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Antennas_CD-ROM_Walnut_Creek_September_1996.iso
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1996-06-30
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2KB
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42 lines
3 CLS
100 PRINT " ***********************************************************"
110 PRINT " * SIGNAL PENETRATIOM *"
120 PRINT " * INTO EARTH *"
130 PRINT " * REFERENCES- ARRL; THE ARRL ANTENNA HANDBOOK, CURRENT ED *"
140 PRINT " * PROGRAM BY R. P. HAVILAND, PE, W4MB *"
150 PRINT " * PROGRAM COPYRIGHT 1990 BY *"
160 PRINT " * MINILAB BOOKS, DAYTONA BEACH, FL 32121-1086 *"
170 PRINT " ***********************************************************"
200 PI=3.141593
500 INPUT " ENTER DIELECTRIC CONSTANT OF EARTH";DIL
510 IF DIL<1 OR DIL>81 THEN PRINT " IMPOSSIBLE VALUE":GOTO 500
600 INPUT " ENTER CONDUCTIVITY OF EARTH, S/M (MHOS/METER)";CON
610 IF CON=<O THEN PRINT " IMPOSSIBLE VALUE":GOTO 600
800 INPUT " ENTER OPERATING FREQUENCY, MHZ";FREQ
1000 X=8.000001E-03*PI*PI*FREQ
1010 B=5.56E-07*DIL*FREQ
1020 FAC1=X*B/2
1030 FAC2=SQR(1+CON*CON*.0001/B/B)-1
1040 P=SQR(FAC1*FAC2)
1500 PRINT
1510 PRINT " SKIN DEPTH=";INT(.1 /P)/10;"METERS"
1520 PRINT " =";INT(.328/P)/10 ;"FEET"
1530 IF P>.0328 THEN PRINT " =";INT(.3936/P);"INCHES"
2000 PRINT
2010 PRINT " ENTER D- CURRENT RATIO AT DEPTH D"
2020 PRINT " F- NEW FREQUENCY"
2030 PRINT " R- RERUN"
2040 PRINT " Q- QUIT"
2050 INPUT T$
2060 PRINT
2100 IF T$="D" THEN 2500
2110 IF T$="F" THEN 800
2120 IF T$="R" THEN 500
2130 IF T$<>"Q" THEN 2100
2200 STOP
2500 INPUT " DEPTH, FT";DEPFT
2510 DEPCM=DEPFT*30.48
2600 CRATIO=EXP(-P*DEPCM)
2610 PRINT " CURRENT RATIO=";CRATIO;"TIMES SURFACE CURRENT DENSITY"
2620 GOTO 2000