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Rev | Author | Line No. | Line |
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2 | mjames | 1 | /*** Translated to the C language by N. Kyriazis 20 Aug 2003 *** |
2 | |||
3 | Program NEC(input,tape5=input,output,tape11,tape12,tape13,tape14, |
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4 | tape15,tape16,tape20,tape21) |
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5 | |||
6 | Numerical Electromagnetics Code (NEC2) developed at Lawrence |
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7 | Livermore lab., Livermore, CA. (contact G. Burke at 415-422-8414 |
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8 | for problems with the NEC code. For problems with the vax implem- |
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9 | entation, contact J. Breakall at 415-422-8196 or E. Domning at 415 |
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10 | 422-5936) |
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11 | file created 4/11/80. |
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12 | |||
13 | ***********Notice********** |
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14 | This computer code material was prepared as an account of work |
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15 | sponsored by the United States government. Neither the United |
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16 | States nor the United States Department Of Energy, nor any of |
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17 | their employees, nor any of their contractors, subcontractors, |
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18 | or their employees, makes any warranty, express or implied, or |
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19 | assumes any legal liability or responsibility for the accuracy, |
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20 | completeness or usefulness of any information, apparatus, product |
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21 | or process disclosed, or represents that its use would not infringe |
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22 | privately-owned rights. |
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23 | |||
24 | ******************************************************************/ |
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25 | |||
26 | #include "nec2c.h" |
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27 | |||
28 | /* common /data/ */ |
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29 | extern data_t data; |
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30 | |||
31 | /* common /gnd/ */ |
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32 | extern gnd_t gnd; |
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33 | |||
34 | /* common /crnt/ */ |
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35 | extern crnt_t crnt; |
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36 | |||
37 | /* common /gwav/ */ |
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38 | extern gwav_t gwav; |
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39 | |||
40 | /* common /fpat/ */ |
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41 | extern fpat_t fpat; |
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42 | |||
43 | /* pointers to input/output files */ |
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44 | extern FILE *input_fp, *output_fp, *plot_fp; |
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45 | |||
46 | /* common /save/ */ |
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47 | extern save_t save; |
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48 | |||
49 | /* common /plot/ */ |
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50 | extern plot_t plot; |
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51 | |||
52 | /*-----------------------------------------------------------------------*/ |
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53 | |||
54 | /* ffld calculates the far zone radiated electric fields, */ |
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55 | /* the factor exp(j*k*r)/(r/lamda) not included */ |
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56 | void ffld (double thet, double phi, complex double *eth, complex double *eph) |
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57 | { |
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58 | int k, i, ip, jump; |
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59 | double phx, phy, roz, rozs, thx, thy, thz, rox, roy; |
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60 | double tthet = 0., darg = 0., omega, el, sill, top, bot, a; |
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61 | double too, boo, b, c, d, rr, ri, arg, dr, rfl, rrz; |
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62 | complex double cix = CPLX_00, ciy = CPLX_00, ciz = CPLX_00; |
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63 | complex double exa, ccx = CPLX_00, ccy = CPLX_00, ccz = CPLX_00, cdp; |
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64 | complex double zrsin, rrv = CPLX_00, rrh = CPLX_00, rrv1 = CPLX_00; |
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65 | complex double rrh1 = CPLX_00, rrv2 = CPLX_00, rrh2 = CPLX_00; |
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66 | complex double tix, tiy, tiz, zscrn, ex = CPLX_00, ey = CPLX_00, ez = CPLX_00, gx, gy, |
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67 | gz; |
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68 | |||
69 | phx = -sinl (phi); |
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70 | phy = cosl (phi); |
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71 | roz = cosl (thet); |
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72 | rozs = roz; |
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73 | thx = roz * phy; |
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74 | thy = -roz * phx; |
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75 | thz = -sinl (thet); |
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76 | rox = -thz * phy; |
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77 | roy = thz * phx; |
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78 | |||
79 | jump = FALSE; |
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80 | if (data.n != 0) |
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81 | { |
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82 | /* loop for structure image if any */ |
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83 | /* calculation of reflection coeffecients */ |
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84 | for (k = 0; k < gnd.ksymp; k++) |
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85 | { |
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86 | if (k != 0) |
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87 | { |
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88 | /* for perfect ground */ |
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89 | if (gnd.iperf == 1) |
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90 | { |
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91 | rrv = -CPLX_10; |
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92 | rrh = -CPLX_10; |
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93 | } |
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94 | else |
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95 | { |
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96 | /* for infinite planar ground */ |
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97 | zrsin = |
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98 | csqrtl (1. - gnd.zrati * gnd.zrati * thz * thz); |
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99 | rrv = -(roz - gnd.zrati * zrsin) / |
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100 | (roz + gnd.zrati * zrsin); |
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101 | rrh = (gnd.zrati * roz - zrsin) / |
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102 | (gnd.zrati * roz + zrsin); |
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103 | |||
104 | } /* if( gnd.iperf == 1) */ |
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105 | |||
106 | /* for the cliff problem, two reflction coefficients calculated |
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107 | */ |
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108 | if (gnd.ifar > 1) |
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109 | { |
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110 | rrv1 = rrv; |
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111 | rrh1 = rrh; |
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112 | tthet = tanl (thet); |
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113 | |||
114 | if (gnd.ifar != 4) |
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115 | { |
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116 | zrsin = csqrtl ( |
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117 | 1. - gnd.zrati2 * gnd.zrati2 * thz * thz); |
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118 | rrv2 = -(roz - gnd.zrati2 * zrsin) / |
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119 | (roz + gnd.zrati2 * zrsin); |
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120 | rrh2 = (gnd.zrati2 * roz - zrsin) / |
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121 | (gnd.zrati2 * roz + zrsin); |
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122 | darg = -TP * 2. * gnd.ch * roz; |
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123 | } |
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124 | } /* if( gnd.ifar > 1) */ |
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125 | |||
126 | roz = -roz; |
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127 | ccx = cix; |
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128 | ccy = ciy; |
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129 | ccz = ciz; |
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130 | |||
131 | } /* if( k != 0 ) */ |
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132 | |||
133 | cix = CPLX_00; |
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134 | ciy = CPLX_00; |
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135 | ciz = CPLX_00; |
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136 | |||
137 | /* loop over structure segments */ |
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138 | for (i = 0; i < data.n; i++) |
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139 | { |
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140 | omega = |
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141 | -(rox * data.cab[i] + roy * data.sab[i] + |
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142 | roz * data.salp[i]); |
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143 | el = PI * data.si[i]; |
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144 | sill = omega * el; |
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145 | top = el + sill; |
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146 | bot = el - sill; |
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147 | |||
148 | if (fabsl (omega) >= 1.0e-7) |
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149 | a = 2. * sinl (sill) / omega; |
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150 | else |
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151 | a = (2. - omega * omega * el * el / 3.) * el; |
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152 | |||
153 | if (fabsl (top) >= 1.0e-7) |
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154 | too = sinl (top) / top; |
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155 | else |
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156 | too = 1. - top * top / 6.; |
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157 | |||
158 | if (fabsl (bot) >= 1.0e-7) |
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159 | boo = sinl (bot) / bot; |
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160 | else |
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161 | boo = 1. - bot * bot / 6.; |
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162 | |||
163 | b = el * (boo - too); |
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164 | c = el * (boo + too); |
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165 | rr = a * crnt.air[i] + b * crnt.bii[i] + c * crnt.cir[i]; |
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166 | ri = a * crnt.aii[i] - b * crnt.bir[i] + c * crnt.cii[i]; |
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167 | arg = |
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168 | TP * (data.x[i] * rox + data.y[i] * roy + data.z[i] * roz); |
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169 | |||
170 | if ((k != 1) || (gnd.ifar < 2)) |
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171 | { |
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172 | /* summation for far field integral */ |
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173 | exa = cmplx (cosl (arg), sinl (arg)) * cmplx (rr, ri); |
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174 | cix = cix + exa * data.cab[i]; |
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175 | ciy = ciy + exa * data.sab[i]; |
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176 | ciz = ciz + exa * data.salp[i]; |
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177 | continue; |
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178 | } |
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179 | |||
180 | /* calculation of image contribution */ |
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181 | /* in cliff and ground screen problems */ |
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182 | |||
183 | /* specular point distance */ |
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184 | dr = data.z[i] * tthet; |
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185 | |||
186 | d = dr * phy + data.x[i]; |
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187 | if (gnd.ifar == 2) |
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188 | { |
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189 | if ((gnd.cl - d) > 0.) |
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190 | { |
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191 | rrv = rrv1; |
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192 | rrh = rrh1; |
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193 | } |
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194 | else |
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195 | { |
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196 | rrv = rrv2; |
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197 | rrh = rrh2; |
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198 | arg = arg + darg; |
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199 | } |
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200 | } /* if( gnd.ifar == 2) */ |
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201 | else |
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202 | { |
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203 | d = sqrtl ( |
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204 | d * d + |
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205 | (data.y[i] - dr * phx) * (data.y[i] - dr * phx)); |
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206 | if (gnd.ifar == 3) |
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207 | { |
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208 | if ((gnd.cl - d) > 0.) |
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209 | { |
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210 | rrv = rrv1; |
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211 | rrh = rrh1; |
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212 | } |
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213 | else |
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214 | { |
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215 | rrv = rrv2; |
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216 | rrh = rrh2; |
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217 | arg = arg + darg; |
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218 | } |
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219 | } /* if( gnd.ifar == 3) */ |
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220 | else |
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221 | { |
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222 | if ((gnd.scrwl - d) >= 0.) |
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223 | { |
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224 | /* radial wire ground screen reflection |
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225 | * coefficient */ |
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226 | d = d + gnd.t2; |
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227 | zscrn = gnd.t1 * d * logl (d / gnd.t2); |
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228 | zscrn = (zscrn * gnd.zrati) / |
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229 | (ETA * gnd.zrati + zscrn); |
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230 | zrsin = csqrtl ( |
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231 | 1. - zscrn * zscrn * thz * thz); |
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232 | rrv = (roz + zscrn * zrsin) / |
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233 | (-roz + zscrn * zrsin); |
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234 | rrh = (zscrn * roz + zrsin) / |
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235 | (zscrn * roz - zrsin); |
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236 | } /* if(( gnd.scrwl- d) < 0.) */ |
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237 | else |
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238 | { |
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239 | if (gnd.ifar == 4) |
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240 | { |
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241 | rrv = rrv1; |
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242 | rrh = rrh1; |
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243 | } /* if( gnd.ifar == 4) */ |
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244 | else |
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245 | { |
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246 | if (gnd.ifar == 5) |
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247 | d = dr * phy + |
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248 | data.x[i]; |
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249 | |||
250 | if ((gnd.cl - d) > 0.) |
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251 | { |
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252 | rrv = rrv1; |
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253 | rrh = rrh1; |
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254 | } |
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255 | else |
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256 | { |
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257 | rrv = rrv2; |
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258 | rrh = rrh2; |
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259 | arg = arg + darg; |
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260 | } /* if(( gnd.cl- d) > 0.) */ |
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261 | |||
262 | } /* if( gnd.ifar == 4) */ |
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263 | |||
264 | } /* if(( gnd.scrwl- d) < 0.) */ |
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265 | |||
266 | } /* if( gnd.ifar == 3) */ |
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267 | |||
268 | } /* if( gnd.ifar == 2) */ |
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269 | |||
270 | /* contribution of each image segment modified by */ |
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271 | /* reflection coef, for cliff and ground screen problems */ |
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272 | exa = cmplx (cosl (arg), sinl (arg)) * cmplx (rr, ri); |
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273 | tix = exa * data.cab[i]; |
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274 | tiy = exa * data.sab[i]; |
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275 | tiz = exa * data.salp[i]; |
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276 | cdp = (tix * phx + tiy * phy) * (rrh - rrv); |
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277 | cix = cix + tix * rrv + cdp * phx; |
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278 | ciy = ciy + tiy * rrv + cdp * phy; |
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279 | ciz = ciz - tiz * rrv; |
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280 | |||
281 | } /* for( i = 0; i < n; i++ ) */ |
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282 | |||
283 | if (k == 0) |
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284 | continue; |
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285 | |||
286 | /* calculation of contribution of structure image for infinite ground |
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287 | */ |
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288 | if (gnd.ifar < 2) |
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289 | { |
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290 | cdp = (cix * phx + ciy * phy) * (rrh - rrv); |
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291 | cix = ccx + cix * rrv + cdp * phx; |
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292 | ciy = ccy + ciy * rrv + cdp * phy; |
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293 | ciz = ccz - ciz * rrv; |
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294 | } |
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295 | else |
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296 | { |
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297 | cix = cix + ccx; |
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298 | ciy = ciy + ccy; |
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299 | ciz = ciz + ccz; |
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300 | } |
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301 | |||
302 | } /* for( k=0; k < gnd.ksymp; k++ ) */ |
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303 | |||
304 | if (data.m > 0) |
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305 | jump = TRUE; |
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306 | else |
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307 | { |
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308 | *eth = (cix * thx + ciy * thy + ciz * thz) * CONST3; |
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309 | *eph = (cix * phx + ciy * phy) * CONST3; |
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310 | return; |
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311 | } |
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312 | |||
313 | } /* if( n != 0) */ |
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314 | |||
315 | if (!jump) |
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316 | { |
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317 | cix = CPLX_00; |
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318 | ciy = CPLX_00; |
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319 | ciz = CPLX_00; |
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320 | } |
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321 | |||
322 | /* electric field components */ |
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323 | roz = rozs; |
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324 | rfl = -1.; |
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325 | for (ip = 0; ip < gnd.ksymp; ip++) |
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326 | { |
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327 | rfl = -rfl; |
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328 | rrz = roz * rfl; |
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329 | fflds (rox, roy, rrz, &crnt.cur[data.n], &gx, &gy, &gz); |
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330 | |||
331 | if (ip != 1) |
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332 | { |
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333 | ex = gx; |
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334 | ey = gy; |
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335 | ez = gz; |
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336 | continue; |
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337 | } |
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338 | |||
339 | if (gnd.iperf == 1) |
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340 | { |
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341 | gx = -gx; |
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342 | gy = -gy; |
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343 | gz = -gz; |
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344 | } |
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345 | else |
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346 | { |
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347 | rrv = csqrtl (1. - gnd.zrati * gnd.zrati * thz * thz); |
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348 | rrh = gnd.zrati * roz; |
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349 | rrh = (rrh - rrv) / (rrh + rrv); |
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350 | rrv = gnd.zrati * rrv; |
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351 | rrv = -(roz - rrv) / (roz + rrv); |
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352 | *eth = (gx * phx + gy * phy) * (rrh - rrv); |
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353 | gx = gx * rrv + *eth * phx; |
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354 | gy = gy * rrv + *eth * phy; |
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355 | gz = gz * rrv; |
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356 | |||
357 | } /* if( gnd.iperf == 1) */ |
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358 | |||
359 | ex = ex + gx; |
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360 | ey = ey + gy; |
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361 | ez = ez - gz; |
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362 | |||
363 | } /* for( ip = 0; ip < gnd.ksymp; ip++ ) */ |
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364 | |||
365 | ex = ex + cix * CONST3; |
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366 | ey = ey + ciy * CONST3; |
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367 | ez = ez + ciz * CONST3; |
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368 | *eth = ex * thx + ey * thy + ez * thz; |
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369 | *eph = ex * phx + ey * phy; |
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370 | |||
371 | return; |
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372 | } |
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373 | |||
374 | /*-----------------------------------------------------------------------*/ |
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375 | |||
376 | /* calculates the xyz components of the electric */ |
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377 | /* field due to surface currents */ |
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378 | void fflds ( |
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379 | double rox, |
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380 | double roy, |
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381 | double roz, |
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382 | complex double *scur, |
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383 | complex double *ex, |
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384 | complex double *ey, |
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385 | complex double *ez) |
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386 | { |
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387 | double *xs, *ys, *zs, *s; |
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388 | int j, i, k; |
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389 | double arg; |
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390 | complex double ct; |
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391 | |||
392 | xs = data.px; |
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393 | ys = data.py; |
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394 | zs = data.pz; |
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395 | s = data.pbi; |
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396 | |||
397 | *ex = CPLX_00; |
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398 | *ey = CPLX_00; |
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399 | *ez = CPLX_00; |
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400 | |||
401 | i = -1; |
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402 | for (j = 0; j < data.m; j++) |
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403 | { |
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404 | i++; |
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405 | arg = TP * (rox * xs[i] + roy * ys[i] + roz * zs[i]); |
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406 | ct = cmplx (cosl (arg) * s[i], sinl (arg) * s[i]); |
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407 | k = 3 * j; |
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408 | *ex += scur[k] * ct; |
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409 | *ey += scur[k + 1] * ct; |
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410 | *ez += scur[k + 2] * ct; |
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411 | } |
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412 | |||
413 | ct = rox * *ex + roy * *ey + roz * *ez; |
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414 | *ex = CONST4 * (ct * rox - *ex); |
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415 | *ey = CONST4 * (ct * roy - *ey); |
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416 | *ez = CONST4 * (ct * roz - *ez); |
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417 | |||
418 | return; |
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419 | } |
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420 | |||
421 | /*-----------------------------------------------------------------------*/ |
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422 | |||
423 | /* gfld computes the radiated field including ground wave. */ |
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424 | void gfld ( |
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425 | double rho, |
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426 | double phi, |
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427 | double rz, |
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428 | complex double *eth, |
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429 | complex double *epi, |
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430 | complex double *erd, |
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431 | complex double ux, |
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432 | int ksymp) |
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433 | { |
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434 | int i, k; |
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435 | double b, r, thet, arg, phx, phy, rx, ry, dx, dy, dz, rix, riy, rhs, rhp; |
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436 | double rhx, rhy, calp, cbet, sbet, cph, sph, el, rfl, riz, thx, thy, thz; |
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437 | double rxyz, rnx, rny, rnz, omega, sill, top, bot, a, too, boo, c, rr, ri; |
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438 | complex double cix, ciy, ciz, exa, erv; |
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439 | complex double ezv, erh, eph, ezh, ex, ey; |
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440 | |||
441 | r = sqrtl (rho * rho + rz * rz); |
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442 | if ((ksymp == 1) || (cabs (ux) > .5) || (r > 1.e5)) |
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443 | { |
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444 | /* computation of space wave only */ |
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445 | if (rz >= 1.0e-20) |
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446 | thet = atanl (rho / rz); |
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447 | else |
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448 | thet = PI * .5; |
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449 | |||
450 | ffld (thet, phi, eth, epi); |
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451 | arg = -TP * r; |
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452 | exa = cmplx (cosl (arg), sinl (arg)) / r; |
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453 | *eth = *eth * exa; |
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454 | *epi = *epi * exa; |
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455 | *erd = CPLX_00; |
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456 | return; |
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457 | } /* if( (ksymp == 1) && (cabs(ux) > .5) && (r > 1.e5) ) */ |
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458 | |||
459 | /* computation of space and ground waves. */ |
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460 | gwav.u = ux; |
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461 | gwav.u2 = gwav.u * gwav.u; |
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462 | phx = -sinl (phi); |
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463 | phy = cosl (phi); |
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464 | rx = rho * phy; |
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465 | ry = -rho * phx; |
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466 | cix = CPLX_00; |
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467 | ciy = CPLX_00; |
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468 | ciz = CPLX_00; |
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469 | |||
470 | /* summation of field from individual segments */ |
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471 | for (i = 0; i < data.n; i++) |
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472 | { |
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473 | dx = data.cab[i]; |
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474 | dy = data.sab[i]; |
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475 | dz = data.salp[i]; |
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476 | rix = rx - data.x[i]; |
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477 | riy = ry - data.y[i]; |
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478 | rhs = rix * rix + riy * riy; |
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479 | rhp = sqrtl (rhs); |
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480 | |||
481 | if (rhp >= 1.0e-6) |
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482 | { |
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483 | rhx = rix / rhp; |
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484 | rhy = riy / rhp; |
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485 | } |
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486 | else |
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487 | { |
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488 | rhx = 1.; |
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489 | rhy = 0.; |
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490 | } |
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491 | |||
492 | calp = 1. - dz * dz; |
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493 | if (calp >= 1.0e-6) |
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494 | { |
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495 | calp = sqrtl (calp); |
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496 | cbet = dx / calp; |
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497 | sbet = dy / calp; |
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498 | cph = rhx * cbet + rhy * sbet; |
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499 | sph = rhy * cbet - rhx * sbet; |
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500 | } |
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501 | else |
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502 | { |
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503 | cph = rhx; |
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504 | sph = rhy; |
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505 | } |
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506 | |||
507 | el = PI * data.si[i]; |
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508 | rfl = -1.; |
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509 | |||
510 | /* integration of (current)*(phase factor) over segment and image for */ |
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511 | /* constant, sine, and cosine current distributions */ |
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512 | for (k = 0; k < 2; k++) |
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513 | { |
||
514 | rfl = -rfl; |
||
515 | riz = rz - data.z[i] * rfl; |
||
516 | rxyz = sqrtl (rix * rix + riy * riy + riz * riz); |
||
517 | rnx = rix / rxyz; |
||
518 | rny = riy / rxyz; |
||
519 | rnz = riz / rxyz; |
||
520 | omega = -(rnx * dx + rny * dy + rnz * dz * rfl); |
||
521 | sill = omega * el; |
||
522 | top = el + sill; |
||
523 | bot = el - sill; |
||
524 | |||
525 | if (fabsl (omega) >= 1.0e-7) |
||
526 | a = 2. * sinl (sill) / omega; |
||
527 | else |
||
528 | a = (2. - omega * omega * el * el / 3.) * el; |
||
529 | |||
530 | if (fabsl (top) >= 1.0e-7) |
||
531 | too = sinl (top) / top; |
||
532 | else |
||
533 | too = 1. - top * top / 6.; |
||
534 | |||
535 | if (fabsl (bot) >= 1.0e-7) |
||
536 | boo = sinl (bot) / bot; |
||
537 | else |
||
538 | boo = 1. - bot * bot / 6.; |
||
539 | |||
540 | b = el * (boo - too); |
||
541 | c = el * (boo + too); |
||
542 | rr = a * crnt.air[i] + b * crnt.bii[i] + c * crnt.cir[i]; |
||
543 | ri = a * crnt.aii[i] - b * crnt.bir[i] + c * crnt.cii[i]; |
||
544 | arg = TP * (data.x[i] * rnx + data.y[i] * rny + data.z[i] * rnz * rfl); |
||
545 | exa = cmplx (cosl (arg), sinl (arg)) * cmplx (rr, ri) / TP; |
||
546 | |||
547 | if (k != 1) |
||
548 | { |
||
549 | gwav.xx1 = exa; |
||
550 | gwav.r1 = rxyz; |
||
551 | gwav.zmh = riz; |
||
552 | continue; |
||
553 | } |
||
554 | |||
555 | gwav.xx2 = exa; |
||
556 | gwav.r2 = rxyz; |
||
557 | gwav.zph = riz; |
||
558 | |||
559 | } /* for( k = 0; k < 2; k++ ) */ |
||
560 | |||
561 | /* call subroutine to compute the field */ |
||
562 | /* of segment including ground wave. */ |
||
563 | gwave (&erv, &ezv, &erh, &ezh, &eph); |
||
564 | erh = erh * cph * calp + erv * dz; |
||
565 | eph = eph * sph * calp; |
||
566 | ezh = ezh * cph * calp + ezv * dz; |
||
567 | ex = erh * rhx - eph * rhy; |
||
568 | ey = erh * rhy + eph * rhx; |
||
569 | cix = cix + ex; |
||
570 | ciy = ciy + ey; |
||
571 | ciz = ciz + ezh; |
||
572 | |||
573 | } /* for( i = 0; i < n; i++ ) */ |
||
574 | |||
575 | arg = -TP * r; |
||
576 | exa = cmplx (cosl (arg), sinl (arg)); |
||
577 | cix = cix * exa; |
||
578 | ciy = ciy * exa; |
||
579 | ciz = ciz * exa; |
||
580 | rnx = rx / r; |
||
581 | rny = ry / r; |
||
582 | rnz = rz / r; |
||
583 | thx = rnz * phy; |
||
584 | thy = -rnz * phx; |
||
585 | thz = -rho / r; |
||
586 | *eth = cix * thx + ciy * thy + ciz * thz; |
||
587 | *epi = cix * phx + ciy * phy; |
||
588 | *erd = cix * rnx + ciy * rny + ciz * rnz; |
||
589 | |||
590 | return; |
||
591 | } |
||
592 | |||
593 | /*-----------------------------------------------------------------------*/ |
||
594 | |||
595 | /* compute radiation pattern, gain, normalized gain */ |
||
596 | void rdpat (void) |
||
597 | { |
||
598 | char *hpol[3] = {"LINEAR", "RIGHT ", "LEFT "}; |
||
599 | char *igtp[2] = {"- POWER GAINS -", "- DIRECTIVE GAINS -"}; |
||
600 | char *igax[4] = {" MAJOR", " MINOR", "VERT. ", "HOR. "}; |
||
601 | char *igntp[5] = { |
||
602 | " MAJOR AXIS", " MINOR AXIS", " VERTICAL", " HORIZONTAL", " TOTAL "}; |
||
603 | |||
604 | char *hclif = NULL, *isens; |
||
605 | int i, j, jump, itmp1, itmp2, kth, kph, itmp3, itmp4; |
||
606 | double exrm = 0., exra = 0., prad, gcon, gcop, gmax, pint, tmp1, tmp2; |
||
607 | double phi, pha, thet, tha, erdm = 0., erda = 0., ethm2, ethm, *gain = NULL; |
||
608 | double etha, ephm2, ephm, epha, tilta, emajr2, eminr2, axrat; |
||
609 | double dfaz, dfaz2, cdfaz, tstor1 = 0., tstor2, stilta, gnmj; |
||
610 | double gnmn, gnv, gnh, gtot, tmp3, tmp4, da, tmp5, tmp6; |
||
611 | complex double eth, eph, erd; |
||
612 | |||
613 | /* Allocate memory to gain buffer */ |
||
614 | if (fpat.inor > 0) |
||
615 | mem_alloc ((void *) &gain, fpat.nth * fpat.nph * sizeof (double)); |
||
616 | |||
617 | if (gnd.ifar > 1) |
||
618 | { |
||
619 | fprintf ( |
||
620 | output_fp, |
||
621 | "\n\n\n\n" |
||
622 | " " |
||
623 | "- - - FAR FIELD GROUND PARAMETERS - - -\n"); |
||
624 | |||
625 | jump = FALSE; |
||
626 | if (gnd.ifar > 3) |
||
627 | { |
||
628 | fprintf ( |
||
629 | output_fp, |
||
630 | "\n" |
||
631 | " " |
||
632 | "--- RADIAL WIRE GROUND SCREEN ---\n" |
||
633 | " " |
||
634 | "NUM OF WIRES= %d\n" |
||
635 | " " |
||
636 | "WIRE LENGTH= %8.2f METERS\n" |
||
637 | " " |
||
638 | "WIRE RADIUS= %10.3E METERS", |
||
639 | gnd.nradl, |
||
640 | save.scrwlt, |
||
641 | save.scrwrt); |
||
642 | |||
643 | if (gnd.ifar == 4) |
||
644 | jump = TRUE; |
||
645 | |||
646 | } /* if( gnd.ifar > 3) */ |
||
647 | |||
648 | if (!jump) |
||
649 | { |
||
650 | if ((gnd.ifar == 2) || (gnd.ifar == 5)) |
||
651 | hclif = "LINEAR"; |
||
652 | if ((gnd.ifar == 3) || (gnd.ifar == 6)) |
||
653 | hclif = "CIRCULAR"; |
||
654 | |||
655 | gnd.cl = fpat.clt / data.wlam; |
||
656 | gnd.ch = fpat.cht / data.wlam; |
||
657 | gnd.zrati2 = |
||
658 | csqrtl (1. / cmplx (fpat.epsr2, -fpat.sig2 * data.wlam * 59.96)); |
||
659 | |||
660 | fprintf ( |
||
661 | output_fp, |
||
662 | "\n" |
||
663 | " " |
||
664 | "- - %s CLIFF - -\n" |
||
665 | " " |
||
666 | "EDGE DISTANCE= %9.2f METERS\n" |
||
667 | " " |
||
668 | " HEIGHT= %9.2f METERS\n" |
||
669 | " " |
||
670 | "--- SECOND MEDIUM ---\n" |
||
671 | " " |
||
672 | "RELATIVE DIELECTRIC CONST= %10.3f\n" |
||
673 | " " |
||
674 | " GROUND CONDUCTIVITY= %10.3f MHOS", |
||
675 | hclif, |
||
676 | fpat.clt, |
||
677 | fpat.cht, |
||
678 | fpat.epsr2, |
||
679 | fpat.sig2); |
||
680 | |||
681 | } /* if( ! jump ) */ |
||
682 | |||
683 | } /* if( gnd.ifar > 1) */ |
||
684 | |||
685 | if (gnd.ifar == 1) |
||
686 | { |
||
687 | fprintf ( |
||
688 | output_fp, |
||
689 | "\n\n\n" |
||
690 | " " |
||
691 | "------- RADIATED FIELDS NEAR GROUND --------\n\n" |
||
692 | " ------- LOCATION ------- --- E(THETA) --- " |
||
693 | " ---- E(PHI) ---- --- E(RADIAL) ---\n" |
||
694 | " RHO PHI Z MAG PHASE " |
||
695 | " MAG PHASE MAG PHASE \n" |
||
696 | " METERS DEG. METERS VOLTS/M DEGREES " |
||
697 | " VOLTS/M DEG. VOLTS/M DEG. "); |
||
698 | } |
||
699 | else |
||
700 | { |
||
701 | itmp1 = 2 * fpat.iax; |
||
702 | itmp2 = itmp1 + 1; |
||
703 | |||
704 | fprintf ( |
||
705 | output_fp, |
||
706 | "\n\n\n\n" |
||
707 | " " |
||
708 | "- - - RADIATION PATTERNS - - -\n"); |
||
709 | |||
710 | if (fpat.rfld >= 1.0e-20) |
||
711 | { |
||
712 | exrm = 1. / fpat.rfld; |
||
713 | exra = fpat.rfld / data.wlam; |
||
714 | exra = -360. * (exra - floorl (exra)); |
||
715 | |||
716 | fprintf ( |
||
717 | output_fp, |
||
718 | "\n" |
||
719 | " " |
||
720 | "RANGE: %13.6E METERS\n" |
||
721 | " " |
||
722 | "EXP(-JKR)/R: %12.5E AT PHASE: %7.2f DEGREES\n", |
||
723 | fpat.rfld, |
||
724 | exrm, |
||
725 | exra); |
||
726 | } |
||
727 | |||
728 | fprintf ( |
||
729 | output_fp, |
||
730 | "\n" |
||
731 | " - - ANGLES - - %23s - - - POLARIZATION - - - " |
||
732 | " - - - E(THETA) - - - - - - E(PHI) - - -\n" |
||
733 | " THETA PHI %6s %6s TOTAL AXIAL TILT " |
||
734 | " SENSE MAGNITUDE PHASE MAGNITUDE PHASE \n" |
||
735 | " DEGREES DEGREES DB DB DB RATIO " |
||
736 | "DEG. VOLTS/M DEGREES VOLTS/M DEGREES", |
||
737 | igtp[fpat.ipd], |
||
738 | igax[itmp1], |
||
739 | igax[itmp2]); |
||
740 | |||
741 | } /* if( gnd.ifar == 1) */ |
||
742 | |||
743 | if ((fpat.ixtyp == 0) || (fpat.ixtyp == 5)) |
||
744 | { |
||
745 | gcop = data.wlam * data.wlam * 2. * PI / (376.73 * fpat.pinr); |
||
746 | prad = fpat.pinr - fpat.ploss - fpat.pnlr; |
||
747 | gcon = gcop; |
||
748 | if (fpat.ipd != 0) |
||
749 | gcon = gcon * fpat.pinr / prad; |
||
750 | } |
||
751 | else if (fpat.ixtyp == 4) |
||
752 | { |
||
753 | fpat.pinr = 394.51 * fpat.xpr6 * fpat.xpr6 * data.wlam * data.wlam; |
||
754 | gcop = data.wlam * data.wlam * 2. * PI / (376.73 * fpat.pinr); |
||
755 | prad = fpat.pinr - fpat.ploss - fpat.pnlr; |
||
756 | gcon = gcop; |
||
757 | if (fpat.ipd != 0) |
||
758 | gcon = gcon * fpat.pinr / prad; |
||
759 | } |
||
760 | else |
||
761 | { |
||
762 | prad = 0.; |
||
763 | gcon = 4. * PI / (1. + fpat.xpr6 * fpat.xpr6); |
||
764 | gcop = gcon; |
||
765 | } |
||
766 | |||
767 | i = 0; |
||
768 | gmax = -1.e+10; |
||
769 | pint = 0.; |
||
770 | tmp1 = fpat.dph * TA; |
||
771 | tmp2 = .5 * fpat.dth * TA; |
||
772 | phi = fpat.phis - fpat.dph; |
||
773 | |||
774 | for (kph = 1; kph <= fpat.nph; kph++) |
||
775 | { |
||
776 | phi += fpat.dph; |
||
777 | pha = phi * TA; |
||
778 | thet = fpat.thets - fpat.dth; |
||
779 | |||
780 | for (kth = 1; kth <= fpat.nth; kth++) |
||
781 | { |
||
782 | thet += fpat.dth; |
||
783 | if ((gnd.ksymp == 2) && (thet > 90.01) && (gnd.ifar != 1)) |
||
784 | continue; |
||
785 | |||
786 | tha = thet * TA; |
||
787 | if (gnd.ifar != 1) |
||
788 | ffld (tha, pha, ð, &eph); |
||
789 | else |
||
790 | { |
||
791 | gfld ( |
||
792 | fpat.rfld / data.wlam, |
||
793 | pha, |
||
794 | thet / data.wlam, |
||
795 | ð, |
||
796 | &eph, |
||
797 | &erd, |
||
798 | gnd.zrati, |
||
799 | gnd.ksymp); |
||
800 | erdm = cabs (erd); |
||
801 | erda = cang (erd); |
||
802 | } |
||
803 | |||
804 | ethm2 = creal (eth * conjl (eth)); |
||
805 | ethm = sqrtl (ethm2); |
||
806 | etha = cang (eth); |
||
807 | ephm2 = creal (eph * conjl (eph)); |
||
808 | ephm = sqrtl (ephm2); |
||
809 | epha = cang (eph); |
||
810 | |||
811 | /* elliptical polarization calc. */ |
||
812 | if (gnd.ifar != 1) |
||
813 | { |
||
814 | if ((ethm2 <= 1.0e-20) && (ephm2 <= 1.0e-20)) |
||
815 | { |
||
816 | tilta = 0.; |
||
817 | emajr2 = 0.; |
||
818 | eminr2 = 0.; |
||
819 | axrat = 0.; |
||
820 | isens = " "; |
||
821 | } |
||
822 | else |
||
823 | { |
||
824 | dfaz = epha - etha; |
||
825 | if (epha >= 0.) |
||
826 | dfaz2 = dfaz - 360.; |
||
827 | else |
||
828 | dfaz2 = dfaz + 360.; |
||
829 | |||
830 | if (fabsl (dfaz) > fabsl (dfaz2)) |
||
831 | dfaz = dfaz2; |
||
832 | |||
833 | cdfaz = cosl (dfaz * TA); |
||
834 | tstor1 = ethm2 - ephm2; |
||
835 | tstor2 = 2. * ephm * ethm * cdfaz; |
||
836 | tilta = .5 * atan2l (tstor2, tstor1); |
||
837 | stilta = sinl (tilta); |
||
838 | tstor1 = tstor1 * stilta * stilta; |
||
839 | tstor2 = tstor2 * stilta * cosl (tilta); |
||
840 | emajr2 = -tstor1 + tstor2 + ethm2; |
||
841 | eminr2 = tstor1 - tstor2 + ephm2; |
||
842 | if (eminr2 < 0.) |
||
843 | eminr2 = 0.; |
||
844 | |||
845 | axrat = sqrtl (eminr2 / emajr2); |
||
846 | tilta = tilta * TD; |
||
847 | if (axrat <= 1.0e-5) |
||
848 | isens = hpol[0]; |
||
849 | else if (dfaz <= 0.) |
||
850 | isens = hpol[1]; |
||
851 | else |
||
852 | isens = hpol[2]; |
||
853 | |||
854 | } /* if( (ethm2 <= 1.0e-20) && (ephm2 <= 1.0e-20) ) */ |
||
855 | |||
856 | gnmj = db10 (gcon * emajr2); |
||
857 | gnmn = db10 (gcon * eminr2); |
||
858 | gnv = db10 (gcon * ethm2); |
||
859 | gnh = db10 (gcon * ephm2); |
||
860 | gtot = db10 (gcon * (ethm2 + ephm2)); |
||
861 | |||
862 | if (fpat.inor > 0) |
||
863 | { |
||
864 | i++; |
||
865 | switch (fpat.inor) |
||
866 | { |
||
867 | case 1: |
||
868 | tstor1 = gnmj; |
||
869 | break; |
||
870 | |||
871 | case 2: |
||
872 | tstor1 = gnmn; |
||
873 | break; |
||
874 | |||
875 | case 3: |
||
876 | tstor1 = gnv; |
||
877 | break; |
||
878 | |||
879 | case 4: |
||
880 | tstor1 = gnh; |
||
881 | break; |
||
882 | |||
883 | case 5: |
||
884 | tstor1 = gtot; |
||
885 | } |
||
886 | |||
887 | gain[i - 1] = tstor1; |
||
888 | if (tstor1 > gmax) |
||
889 | gmax = tstor1; |
||
890 | |||
891 | } /* if( fpat.inor > 0) */ |
||
892 | |||
893 | if (fpat.iavp != 0) |
||
894 | { |
||
895 | tstor1 = gcop * (ethm2 + ephm2); |
||
896 | tmp3 = tha - tmp2; |
||
897 | tmp4 = tha + tmp2; |
||
898 | |||
899 | if (kth == 1) |
||
900 | tmp3 = tha; |
||
901 | else if (kth == fpat.nth) |
||
902 | tmp4 = tha; |
||
903 | |||
904 | da = fabsl (tmp1 * (cosl (tmp3) - cosl (tmp4))); |
||
905 | if ((kph == 1) || (kph == fpat.nph)) |
||
906 | da *= .5; |
||
907 | pint += tstor1 * da; |
||
908 | |||
909 | if (fpat.iavp == 2) |
||
910 | continue; |
||
911 | } |
||
912 | |||
913 | if (fpat.iax != 1) |
||
914 | { |
||
915 | tmp5 = gnmj; |
||
916 | tmp6 = gnmn; |
||
917 | } |
||
918 | else |
||
919 | { |
||
920 | tmp5 = gnv; |
||
921 | tmp6 = gnh; |
||
922 | } |
||
923 | |||
924 | ethm = ethm * data.wlam; |
||
925 | ephm = ephm * data.wlam; |
||
926 | |||
927 | if (fpat.rfld >= 1.0e-20) |
||
928 | { |
||
929 | ethm = ethm * exrm; |
||
930 | etha = etha + exra; |
||
931 | ephm = ephm * exrm; |
||
932 | epha = epha + exra; |
||
933 | } |
||
934 | |||
935 | fprintf ( |
||
936 | output_fp, |
||
937 | "\n" |
||
938 | "%8.2f%9.2f %8.2f%8.2f%8.2f%11.5f" |
||
939 | " %8.2f %5s %11.5E%9.2f %11.5E%9.2f", |
||
940 | thet, |
||
941 | phi, |
||
942 | tmp5, |
||
943 | tmp6, |
||
944 | gtot, |
||
945 | axrat, |
||
946 | tilta, |
||
947 | isens, |
||
948 | ethm, |
||
949 | etha, |
||
950 | ephm, |
||
951 | epha); |
||
952 | |||
953 | if (plot.iplp1 != 3) |
||
954 | continue; |
||
955 | |||
956 | if (plot.iplp3 != 0) |
||
957 | { |
||
958 | if (plot.iplp2 == 1) |
||
959 | { |
||
960 | if (plot.iplp3 == 1) |
||
961 | fprintf ( |
||
962 | plot_fp, |
||
963 | "%12.5E %12.5E %12.5E\n", |
||
964 | (float) thet, |
||
965 | (float) ethm, |
||
966 | (float) etha); |
||
967 | else if (plot.iplp3 == 2) |
||
968 | fprintf ( |
||
969 | plot_fp, |
||
970 | "%12.5E %12.5E %12.5E\n", |
||
971 | (float) thet, |
||
972 | (float) ephm, |
||
973 | (float) epha); |
||
974 | } |
||
975 | |||
976 | if (plot.iplp2 == 2) |
||
977 | { |
||
978 | if (plot.iplp3 == 1) |
||
979 | fprintf ( |
||
980 | plot_fp, |
||
981 | "%12.4E %12.4E %12.4E\n", |
||
982 | phi, |
||
983 | ethm, |
||
984 | etha); |
||
985 | else if (plot.iplp3 == 2) |
||
986 | fprintf ( |
||
987 | plot_fp, |
||
988 | "%12.4E %12.4E %12.4E\n", |
||
989 | phi, |
||
990 | ephm, |
||
991 | epha); |
||
992 | } |
||
993 | } |
||
994 | |||
995 | if (plot.iplp4 == 0) |
||
996 | continue; |
||
997 | |||
998 | if (plot.iplp2 == 1) |
||
999 | { |
||
1000 | switch (plot.iplp4) |
||
1001 | { |
||
1002 | case 1: |
||
1003 | fprintf ( |
||
1004 | plot_fp, "%12.4E %12.4E\n", thet, tmp5); |
||
1005 | break; |
||
1006 | case 2: |
||
1007 | fprintf ( |
||
1008 | plot_fp, "%12.4E %12.4E\n", thet, tmp6); |
||
1009 | break; |
||
1010 | case 3: |
||
1011 | fprintf ( |
||
1012 | plot_fp, "%12.4E %12.4E\n", thet, gtot); |
||
1013 | } |
||
1014 | } |
||
1015 | |||
1016 | if (plot.iplp2 == 2) |
||
1017 | { |
||
1018 | switch (plot.iplp4) |
||
1019 | { |
||
1020 | case 1: |
||
1021 | fprintf ( |
||
1022 | plot_fp, "%12.4E %12.4E\n", phi, tmp5); |
||
1023 | break; |
||
1024 | case 2: |
||
1025 | fprintf ( |
||
1026 | plot_fp, "%12.4E %12.4E\n", phi, tmp6); |
||
1027 | break; |
||
1028 | case 3: |
||
1029 | fprintf ( |
||
1030 | plot_fp, "%12.4E %12.4E\n", phi, gtot); |
||
1031 | } |
||
1032 | } |
||
1033 | |||
1034 | continue; |
||
1035 | } /* if( gnd.ifar != 1) */ |
||
1036 | |||
1037 | fprintf ( |
||
1038 | output_fp, |
||
1039 | "\n" |
||
1040 | " %9.2f %7.2f %9.2f %11.4E %7.2f %11.4E %7.2f %11.4E %7.2f", |
||
1041 | fpat.rfld, |
||
1042 | phi, |
||
1043 | thet, |
||
1044 | ethm, |
||
1045 | etha, |
||
1046 | ephm, |
||
1047 | epha, |
||
1048 | erdm, |
||
1049 | erda); |
||
1050 | |||
1051 | } /* for( kth = 1; kth <= fpat.nth; kth++ ) */ |
||
1052 | |||
1053 | } /* for( kph = 1; kph <= fpat.nph; kph++ ) */ |
||
1054 | |||
1055 | if (fpat.iavp != 0) |
||
1056 | { |
||
1057 | tmp3 = fpat.thets * TA; |
||
1058 | tmp4 = tmp3 + fpat.dth * TA * (double) (fpat.nth - 1); |
||
1059 | tmp3 = fabsl ( |
||
1060 | fpat.dph * TA * (double) (fpat.nph - 1) * (cosl (tmp3) - cosl (tmp4))); |
||
1061 | pint /= tmp3; |
||
1062 | tmp3 /= PI; |
||
1063 | |||
1064 | fprintf ( |
||
1065 | output_fp, |
||
1066 | "\n\n\n" |
||
1067 | " AVERAGE POWER GAIN= %11.5E SOLID ANGLE" |
||
1068 | " USED IN AVERAGING=( %6.4f)*PI STERADIANS.\n", |
||
1069 | pint, |
||
1070 | tmp3); |
||
1071 | } |
||
1072 | |||
1073 | if (fpat.inor == 0) |
||
1074 | return; |
||
1075 | |||
1076 | if (fabsl (fpat.gnor) > 1.0e-20) |
||
1077 | gmax = fpat.gnor; |
||
1078 | itmp1 = (fpat.inor - 1); |
||
1079 | |||
1080 | fprintf ( |
||
1081 | output_fp, |
||
1082 | "\n\n\n" |
||
1083 | " " |
||
1084 | " ---------- NORMALIZED GAIN ----------\n" |
||
1085 | " %6s GAIN\n" |
||
1086 | " " |
||
1087 | " NORMALIZATION FACTOR: %.2lf db\n\n" |
||
1088 | " ---- ANGLES ---- ---- ANGLES ----" |
||
1089 | " ---- ANGLES ----\n" |
||
1090 | " THETA PHI GAIN THETA PHI " |
||
1091 | " GAIN THETA PHI GAIN\n" |
||
1092 | " DEGREES DEGREES DB DEGREES DEGREES " |
||
1093 | " DB DEGREES DEGREES DB", |
||
1094 | igntp[itmp1], |
||
1095 | gmax); |
||
1096 | |||
1097 | itmp2 = fpat.nph * fpat.nth; |
||
1098 | itmp1 = (itmp2 + 2) / 3; |
||
1099 | itmp2 = itmp1 * 3 - itmp2; |
||
1100 | itmp3 = itmp1; |
||
1101 | itmp4 = 2 * itmp1; |
||
1102 | |||
1103 | if (itmp2 == 2) |
||
1104 | itmp4--; |
||
1105 | |||
1106 | for (i = 0; i < itmp1; i++) |
||
1107 | { |
||
1108 | itmp3++; |
||
1109 | itmp4++; |
||
1110 | j = i / fpat.nth; |
||
1111 | tmp1 = fpat.thets + (double) (i - j * fpat.nth) * fpat.dth; |
||
1112 | tmp2 = fpat.phis + (double) (j) *fpat.dph; |
||
1113 | j = (itmp3 - 1) / fpat.nth; |
||
1114 | tmp3 = fpat.thets + (double) (itmp3 - j * fpat.nth - 1) * fpat.dth; |
||
1115 | tmp4 = fpat.phis + (double) (j) *fpat.dph; |
||
1116 | j = (itmp4 - 1) / fpat.nth; |
||
1117 | tmp5 = fpat.thets + (double) (itmp4 - j * fpat.nth - 1) * fpat.dth; |
||
1118 | tmp6 = fpat.phis + (double) (j) *fpat.dph; |
||
1119 | tstor1 = gain[i] - gmax; |
||
1120 | |||
1121 | if (((i + 1) == itmp1) && (itmp2 != 0)) |
||
1122 | { |
||
1123 | if (itmp2 != 2) |
||
1124 | { |
||
1125 | tstor2 = gain[itmp3 - 1] - gmax; |
||
1126 | fprintf ( |
||
1127 | output_fp, |
||
1128 | "\n" |
||
1129 | " %9.2f %9.2f %9.2f %9.2f %9.2f %9.2f ", |
||
1130 | tmp1, |
||
1131 | tmp2, |
||
1132 | tstor1, |
||
1133 | tmp3, |
||
1134 | tmp4, |
||
1135 | tstor2); |
||
1136 | return; |
||
1137 | } |
||
1138 | |||
1139 | fprintf ( |
||
1140 | output_fp, |
||
1141 | "\n" |
||
1142 | " %9.2f %9.2f %9.2f ", |
||
1143 | tmp1, |
||
1144 | tmp2, |
||
1145 | tstor1); |
||
1146 | return; |
||
1147 | |||
1148 | } /* if( ((i+1) == itmp1) && (itmp2 != 0) ) */ |
||
1149 | |||
1150 | tstor2 = gain[itmp3 - 1] - gmax; |
||
1151 | pint = gain[itmp4 - 1] - gmax; |
||
1152 | |||
1153 | fprintf ( |
||
1154 | output_fp, |
||
1155 | "\n" |
||
1156 | " %9.2f %9.2f %9.2f %9.2f %9.2f %9.2f %9.2f %9.2f %9.2f", |
||
1157 | tmp1, |
||
1158 | tmp2, |
||
1159 | tstor1, |
||
1160 | tmp3, |
||
1161 | tmp4, |
||
1162 | tstor2, |
||
1163 | tmp5, |
||
1164 | tmp6, |
||
1165 | pint); |
||
1166 | |||
1167 | } /* for( i = 0; i < itmp1; i++ ) */ |
||
1168 | |||
1169 | free_ptr ((void *) &gain); |
||
1170 | |||
1171 | return; |
||
1172 | } |
||
1173 | |||
1174 | /*-----------------------------------------------------------------------*/ |