STRUCTURE OF NEC CARD IMAGES, ONE CARD = ONE LINE IN IMAGE

NAME		CARD CONTENTS
	I= INTEGER, NO DECIMAL POINT ALLOWED
	F= FLOATING POINT VALUE, DECIMAL POINT REQUIRED

	****   STRUCTURE GEOMETRY CARDS   ****

CM CE   	 COMMENTS
	MAX 78 CHARACTERS PER CARD (LINE)

GA		WIRE ARC
	I1- TAG NO.
	I2- NO. SEGMENTS IN ARC
	F1- ARC RADIUS
	F2- START ANGLE, DEG.
	F3- END ANGLE
	F4- WIRE RADIUS

GE		GEOMETRY END
	I1- O=NO GND, +/-=GND, +BASE CHARGE=0, -BASE CURRENT=0

GH		HELIX/SPIRAL
	I1- TAG NO.
	I2- NO SEGMENTS
	F1- TURN SPACING, 0=SPIRAL
	F2- LENGTH, - FOR LEFT HAND
	F3- X RADIUS AT START
	F4- Y RADIUS AT START
	F5- X RADIUS AT END
	F6- Y RADIUS AT END
	F7- WIRE RADIUS

GF		READ SAVED NGF FILE
	I1- <>0 TO PRINT TABLE OF SEGMENT ENDS

GM		RELOCATE/REORIENT
	I1- TAG INCREMENT FOR NEW STRUCTURE
	I2- NO. NEW STRUCTURES
	F1- ROTATE ABOUT X, DEG., +=RIGHT HAND
	F2- ROTATE ABOUT Y, DEG. (SEPARATE CARDS TO CHANGE ORDER)
	F3- ROTATE ABOUT Z, DEG.
	F4- X TRANSLATE
	F5- Y TRANSLATE
	F6- Z TRANSLATE
	F7- TAG TO MOVE, 0=ALL TAGS

GR		GENERATE CYLINDER, Z>0
	I1- TAG INCREMENT
	I2- NO. FACES APPROXIMATING CYLINDER

GS		SCALE DIMENSIONS
	I1- 0=TIMES F1, 1=FT. TO M., 2=IN TO M.
	I2- BLANK
	F1- SCALING FACTOR (I1=0), OR BLANK

GW		STRAIGHT WIRE, ENDS 1,2
	I1- TAG NO.
	I2- NO. SEGMENTS
	F1- X1
	F2- Y1
	F3- Z1
	F4- X2
	F5- Y2
	F6- Z2
	F7- WIRE RAD., 0=USE GC FOR TAPERED WIRE

GC		TAPERED WIRE CONTINUE
	I1- BLANK
	I2- BLANK
	F1- RATIO OF RADII ADJACENT SEGMENTS
	F2- RADIUS FIRST SEGMENT
	F3- RADIUS LAST SEGMENT

GX		REFLECT IN COORDINATE PLANE
	I1- TAG NO. INCREMENT
	I2- 1XX FOR REFLECT IN X, 0XX= NO REFLECT IN X
	    X1X FOR REFLECT IN Y, X0X= NO REFLECT IN Y
	    XX1 FOR REFLECT IN Z, XX0= NO REFLECT IN Z

SP		SURFACE PATCH, SC FOLLOWS IF NOT ARBITRARY
	I1- BLANK
	I2- SHAPE, 0-ARBIT.,OR 1=RECT., 2=TRIAN., 3=QUADLAT. (SEE SC)
	F1- ARB., CENTER X, ELSE CORNER 1 X
	F2- ARB., CENTER Y, ELSE CORNER 1 Y
	F3- ARB., CENTER Z, ELSE CORNER 1 Z
	F4- ARB., ANGLE ABOVE XY, ELSE CORNER 2 X
	F5- ARB., ANGLE FROM X, ELSE CORNER 2 Y
	F6- ARB., PATCH AREA, ELSE CORNER 2 Z

SC		SM PATCH CONTINUE, NOT ARBITRARY
	I1- BLANK
	I2- BLANK
	F1- CORNER 3 X
	F2- CORNER 3 Y
	F3- CORNER 3 Z
	F4- QUAD ONLY, CORNER 4 X
	F5- QUAD ONLY, CORNER 4 Y
	F6- QUAD ONLY, CORNER 4 Z

SM		PATCHES IN RECTANGULAR AREA, SC MUST FOLLOW
	I1- NUMBER OF PATCHES IN X DIRECTION
	I2- NUMBER OF PATCHES IN Y DIRECTION
	F1- CORNER 1 X
	F2- CORNER 1 Y
	F3- CORNER 1 Z
	F4- CORNER 2 X
	F5- CORNER 2 Y
	F6- CORNER 2 Z


SC		SM PATCH CONTINUE
	I1- BLANK
	I2- BLANK
	F1- CORNER 3 X
	F2- CORNER 3 Y
	F3- CORNER 3 Z

	****   PROGRAM CONTROL CARDS   ****

CP		MAXIMUM SEGMENT COUPLING CALCULATION, 2 1/2 CARDS. MAX
	I1- TAG #1 (EXCITE WITH EX CARD, TYPE I1=0)
	I2- SEGMENT # IN TAG 1 TO BE EXCITED
	I3- TAG #2 (CALCULATE WITH XQ, RP, NE, NH CARD)
	I3- SEGMENT # IN TAG 2

EK		USE EXTENDED THIN-WIRE KERNEL
	I1- BLANK OR 0= USE EXT KERNEL, -1 RESET TO USE NORMAL

EN		INDICATES END OF RUN

EX		EXCITE STRUCTURE, LAST ENCOUNTERED=USED
	I1- 0=E VOLTAGE (A), 1=LINEAR WAVE (B), 2= R CIRC WAVE (B)
	    3=L CIRC WAVE (B), 4= CURRENT (C), 5= VOLTAGE DISC. (A)
	I2- (A) SOURCE TAG#, (B) # TH ANGLS, (C) BLANK
	I3- (A) SOURCE SEG#, (B) # PH ANGLS, (C) BLANK
	I4- (A) XX= ADMIT.,IMPED. PRINT, X=0 NO/1 DO, (BC), 1= ADM. PRINT
	F1- (A) EREAL, (B) TH ANGL, (C) X OF SOURCE
	F2- (A) EIMAG, (B) PH ANGL, (C) Y OF SOURCE
	F3- (A) NORM FOR I4, (B) ET ANGL, Z OF SOURCE
	F4- (A) BLANK, (B) TH INC, (C) ALPHA ANGLE FROM XY
	F5- (A) BLANK, (B) PH INC, (C) BETA ANGLE FROM X
	F6- (A) BLANK, (B) MIN/MAJ AXIS, PRODUCT AMPS X LENGTH

FR		FREQUENCY
	I1- O= LINEAR STEP, 1=MULTIPLICATIVE
	I2- NO. STEPS, BLANK=1
	I3- BLANK
	I4- BLANK
	F1- FREQUENCY OR START FREQUENCY
	F2- FREQ INCREMENT, ADD OR MULTIPLY

GD		FAR GROUND, (NEAR GROUND BY GN), (SET FLAG ON RP)
	I1- BLANK
	I2- BLANK
	I3- BLANK
	I4- BLANK
	F1- DIELECTRIC OF FAR GROUND
	F2- CONDUCTIVITY, FAR GROUND
	F3- DISTANCE TO START OF FAR GROUND
	F4- HEIGHT FAR GROUND, 0=SAME AS NEAR, >0= BELOW NEAR GROUND

GN		NEAR GROUND, GROUND SCREEN, ADDED GROUND
	I1- -1=SET FREE SPACE (A), 0=REFL COEFF, 1=IDEAL (B), 2-SOMMERFIELD
	I2- (A) BLANK), NO WIRES IN GND SCREEN (C), 0= NO WIRES (D)
	I3- BLANK
	I4- BLANK
	F1- (A,B) BLANK, DIELECTRIC OF NEAR GROUND
	F2- (A,B) BLANK, CONDUCTIVITY OF NEAR GROUND
	F3- (A,B) BLANK, (C) RADIUS OF SCREEN, (D) DIELECTRIC 2ND MEDIUM
	F4- (A,B) BLANK, (C) RADII SCREEN WIRES, (D) CONDUCT. 2ND MEDIUM
	F5- (A,B) BLANK, (C) BLANK, (D) DIST TO 2ND MEDIUM, SEE RP
	F6- (A,B) BLANK, (C) BLANK, (D) HEIGHT 2ND MEDIUM (AS IN GD)

KH		INTERACTION AP[PROXIMATION RANGE
	I1- BLANK
	I2- BLANK
	I3- BLANK
	I4- BLANK
	F1- DISTANCE TO START APPROXIMATION, WAVELENGTHS

LD		LOADING
	I1- -1 CANCEL LOADS, 0=SERIES RLC LUMP, 1=PARALLEL RLC LUMP,
	    2=SERIES DIST., 3=PARALLEL DIST. (A), 4=Z (B), 5=WIRE COND. (C)
	I2- TAG# TO BE LOADED, BLANK/0= USE ABSOLUTE #s	
	I3- SEG# OF TAG # TO START LOADS, OR ABSOLUTE SEG#
	I4- SEG# OF TAG# TO END LOADS, OR OR ABSOLUTE SEG#
	F1- RES., OHMS, OR (A) OHMS/UNIT LENGTH, OR (B) RES. OR (C) OHMS/METER
	F2- IND., HENRY, OR (A) HY/LENGTH OR (B) REACT. OR (C) BLANK
	F3- CAP,. FARAD, OR (A,B) BLANK

NE NH		NEAR ELECTRIC, NEAR MAGNETIC FIELD
	I1- O=RECT. COORD. (A), 1=SPHERICAL (B)
	I2- NO. POINTS IN (A) X, (B) R (CHANGES MOST RAPIDLY)
	I3- NO. POINTS IN (A) Y, (B) PHI
	I4- NO. POINTS IN (A) X, (B) TH
	F1- COORDINATE (A) X, (B) R
	F2- COORDINATE (A) Y, (B) PHI
	F3- COORDINATE (A) Z, (B) TH
	F4- INCREMENT (A) X, (B) R
	F5- INCREMENT (A) Y, (B) PHI
	F6- INCREMENT (A) Z, (B) TH

NT		NETWORKS
	I1- PORT 1 TAG #, BLANK/0, USE I2 AS ABSOLUTE
	I2- SEGMENT#, OR ABSOLUTE END 1 SEGMENT, -1=CANCEL NETS/LINES
	I3- AS I1 FOR PORT 2
	I4- AS I2 FOR PORT 2
	F1- REAL OF Y(11), MHOS
	F2- IMAG OF Y(11)
	F3- REAL OF Y(12)
	F4- IMAG OF Y(12)
	F5- REAL OF Y(22)
	F6- IMAG OF Y(22)

NX		NEXT STRUCTURE

PQ		PRINT WIRE CHARGE
	I1- -1 NO CHARGE PRINT (DEFAULT), 0 OR BLANK, PRINT CHARGE
	I2- TAG# TO PRINT, 0=I3/I4 IS ABSOLUTE
	I3- START SEGMENT # OF TAG, OR ABSOLUTE SEGMENT#, 0 OR BLANK, ALL SEGS
	I4- END SEG. # OF TAG, OR ABSOLUTE SEG.#, OR BLANK= I3 ONLY

PL		PLOT DATA STORAGE
	I1- 0=NO STORE, 1=CURRENTS, 2=NEAR FIELD, 3=PATTERNS
	I2(1,2)- 0=NO, 1=REAL,IMAG, 3=MAG, PHASE
	I2(3)- 1=TH, 2=PHI, 3=RHO ANGLES
	I3(1)- 0=N0, 1=IX, 2=IY, 3=IZ, 4=IX IY IZ
	I3(2)- 0-N0, 1=X, 2=Y, 3=Z, 4=X Y Z, 5=TOTAL  COMPONENT
	I3(3)- 0=NO, 1=TH, 2=PHI, 3=RHO E-FIELD COMPOMENT
 	I4(1)- BLANK
	I4(2)- 1=X, 2=Y, 3=Z CORDINATE VALUES
	I4(3)- 1=V, 2=H, 3=TOTAL, 4=V H T     GAINS DB

PT		CURRENT PRINT CONTROL
	I1- -2=ALL, -1=SUPR. PRNT., 0=SEGS BELOW, 1=REC. FMT., 2=NORMAL(1)
	I2- TAG# OF SEGMENT, 0=ABSOLUTE LOCATION
	I3- START SEG OR ABS SEG
	I4- END SEG OR ABS SEG
		(1,1,1,1=SUPPRESS CURRENT PRINT)

RP		RADIATION PATTERN SET
	I1- SEE GN; 0=SPACE WAVE, 1=SPACE+GND WAVE, 2=LIN CLIFF, 3=CIR CLIFF,
	     4=GND SCREEN, 5=SCRN+LIN CLIFF, 6=SCRN+CIR CLIFF
	I2- # VALUES OF TH, BLANK=1
	I3- # VALUES OF PHI, BLANK=1
	I4- BLANK IF I1=1, ELSE abcd
	 a- 0=MAJ0R, MINOR, TOT, 1=V, H, TOT   AXIS GAIN
	 b- 0=NONE, 1=MAJ, 2=MIN, 3=V, 4=H, 5=T NORMALIZED AXIX GAIN
	 c- 0=POWER GAIN, 1=DIRECTIVE GAIN
	 d- 0= NO AVERAGE, 1=AVERAGE, 2= AVERAGE SOME SUPPRESSED
	F1- INITIAL TH, OR I1=1, INITIAL Z
	F2- INITIAL PHI
	F3- INCREMENT TH OR I1=1, INCREMENT Z
	F4- INCREMENT PHI
	F5- RADIAL DIST. OF FIELD POINT OR 0=OMIT EXP, 1- CYLIND. CORD.
	F6- NORMALIZE FACTOR FOR I4, BLANK/0= TO MAX GAIN.
NOTE: A BLANK RP CAN BE USED TO SEPARATE DATA BLOCKS

TL		TRANSMISSION LINE 
	I1- PORT 1 TAG #, BLANK/0, USE I2 AS ABSOLUTE
	I2- SEGMENT#, OR ABSOLUTE END 1 SEGMENT, -1=CANCEL NETS/LINES
	I3- AS I1 FOR PORT 2
	I4- AS I2 FOR PORT 2
	F1- LINE Zo, -=CROSSED LINE
	F2- LINE LENGTH METERS, BLANK=STRAIGHT LINE P1 TO P2
	F3- REAL SHUNT ADM., END 1 MHOS
	F4- IMAG SHUNT ADM., END 1
	F5- REAL SHUNT ADM., END 2
	F6- IMAG SHUNT ADM., END 2

WG		WRITE NUMERICAL GREENS FUNCTION FOR LATER USE

XQ		EXECUTE ACCUMULATED CARD DECK
	I1- 0=NO PATTERN, 1=XY PATTERN, 2= YZ PATTERN, 3=BOTH
	   (DO NOT USE FOR RADIAL GND SCREEN OR 2ND GND MEDIUM)

NOTES: FOR A SINGLE FREQUENCY, XQ, NE, NH, RP CAUSE IMMEDIATE EXECUTION
       FOR MULTIPLE FREQS, ONLY XQ, RP CAUSE EXECUTION