Proofread LATITUDE_LONGITUDE_SUBROUTINES.agc (#736)
Co-authored-by: James Harris <wopian@wopian.me>
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@ -29,24 +29,24 @@
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# SUBROUTINE TO CONVERT RAD VECTOR AT GIVEN TIME TO LAT,LONG AND ALT
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#
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# CALLING SEQUENCE
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#
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# L-1 CALL
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# L LAT-LONG
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#
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# SUBROUTINES USED
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# R-TO-RP, ARCTAN, SFTGAMMA, SETRE
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#
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# R-TO-RP,ARCTAN,SETGAMMA,SETRE
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# ERASABLE INIT. REQ.
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# AXO, -AYO, AZO, TEPHEM (SET AT LAUNCH TIME)
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# ALPHAV = POSITION VECTOR METERS B-29
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# MPAC -- TIME (CSECS B-28)
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# ERADFLAG =1, TO COMPUTE EARTH RADIUS, =0 FOR FIXED EARTH RADIUS
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# LUNAFLAG=0 FOR EARTH, 1 FOR MOON
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#
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# AXO,-AYO,AZO,TEPHEM (SET AT LAUNCH TIME)
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# ALPHAV = POSITION VECTOR METERS B-29
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# MPAC-- TIME (CSECS B-28)
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# ERADFLAG =1, TO COMPUTE EARTH RADIUS, =0 FOR FIXED EARTH RADIUS
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# LUNAFLAG=0 FOR EARTH,1 FOR MOON
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# OUTPUT
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#
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# LATITUDE IN LAT (REVS. B-0)
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# LONGITUDE IN LONG (REVS. B-0)
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# ALTITUDE IN ALT METERS B-29
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BANK 30
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SETLOC LATLONG
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BANK
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@ -60,15 +60,15 @@ LAT-LONG STQ SETPD
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ALPHAV
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PUSH ABVAL # 0-5D= R FOR R-TO-RP
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STODL ALPHAM # ABS. VALUE OF R FOR ALT FORMULA BELOW
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ZEROVEC # SET MPAC=0 FOR EARTH, NON-ZERO FOR MOON
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ZEROVEC # SET MPAC=0 FOR EARTH,NON-ZERO FOR MOON
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BOFF COS # USE COS(0) TO GET NON-ZERO IN MPAC
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LUNAFLAG # 0=EARTH, 1=MOON
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LUNAFLAG # 0=EARTH,1=MOON
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CALLRTRP
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CALLRTRP CALL
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R-TO-RP # RP VECTOR CONVERTED FROM R B-29
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UNIT # UNIT RP B-1
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STCALL ALPHAV # U2= 1/2 SINL FOR SETRE SUBR BELOW
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SETGAMMA # SET GAMMA=B2/A2 FOR EARTH, =1 FOR MOON
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SETGAMMA # SET GAMMA=B2/A2 FOR EARTH,=1 FOR MOON
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CALL # SCALED B-1
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SETRE # CALC RE METERS B-29
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DLOAD DSQ
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@ -96,49 +96,48 @@ CALLRTRP CALL
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STCALL ALT # EXIT WITH ALT METERS B-29
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INCORPEX
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# Page 1135
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# SUBROUTINE TO CONVERT LAT,LONG.ALT AT GIVEN TIME TO RADIUS VECTOR
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#
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# SUBROUTINE TO CONVERT LAT,LONG,ALT AT GIVEN TIME TO RADIUS VECTOR
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# CALLING SEQUENCE
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#
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# L-1 CALL
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# L LALOTORV
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#
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# SUBROUTINES USED
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# SETGAMMA, SETRE, RP-TO-R
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#
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# SETGAMMA,SETRE,RP-TO-R
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# ERASABLE INIT. REQ.
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# AXO, AYO, AZO, TEPHEM SET AT LAUNCH TIME
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# LAT -- LATITUDE (REVS B0)
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# LONG -- LONGITUDE (REVS B0)
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# ALT -- ALTITUDE (METERS) B-29
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# MPAC -- TIME (CSECS B-28)
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# ERADFLAG =1 TO COMPUTE EARTH RADIUS, =0 FOR FIXED EARTH RADIUS
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# LUNAFLAG=0 FOR EARTH, 1 FOR MOON
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#
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# AXO,AYO,AZO,TEPHEM SET AT LAUNCH TIME
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# LAT-- LATITUDE (REVS B0)
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# LONG-- LONGITUDE (REVS B0)
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# ALT--ALTITUDE (METERS) B-29
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# MPAC-- TIME (CSECS B-28)
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# ERADFLAG =1 TO COMPUTE EARTH RADIUS, =0 FOR FIXED EARTH RADIUS
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# LUNAFLAG=0 FOR EARTH,1 FOR MOON
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# OUTPUT
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#
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# R-VECTOR IN ALPHAV (METERS B-29)
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LALOTORV STQ SETPD # LAT,LONG,ALT TO R VECTOR
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INCORPEX
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0D
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STCALL 6D # 6-7D= TIME FOR RP-TO-R
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SETGAMMA # GAMMA=B2/A2 FOR EARTH, 1 FOR MOON B-1
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SETGAMMA # GAMMA=B2/A2 FOR EARTH,1 FOR MOON B-1
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DLOAD SIN # COS(LONG)COS(LAT) IN MPAC
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LAT # UNIT RP = SIN(LONG)COS(LAT) 2-3D
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LAT # UNIT RP= SIN(LONG)COS(LAT) 2-3D
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DMPR PDDL # PD 2 GAMMA*SIN(LAT) 0-1D
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GAMRP
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LAT # 0-1D = GAMMA*SIN(LAT) B-2
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COS PDDL # PD4 2-3D = COS(LAT) B-1 TEMPORARILY
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LAT # 0-1D= GAMMA*SIN(LAT) B-2
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COS PDDL # PD4 2-3D=COS(LAT) B-1 TEMPORARILY
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LONG
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SIN DMPR # PD 2
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PDDL COS # PD 4 2-3D = SIN(LONG)COS(LAT) B-2
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PDDL COS # PD 4 2-3D=SIN(LONG)COS(LAT) B-2
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LAT
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PDDL COS # PD 6 4-5D = COS(LAT) B-1 TEMPORARILY
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PDDL COS # PD 6 4-5D=COS(LAT) B-1 TEMPORARILY
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LONG
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DMPR VDEF # PD 4 MPAC = COS(LONG)COS(LAT) B-2
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DMPR VDEF # PD 4 MPAC= COS(LONG)COS(LAT) B-2
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UNIT PUSH # 0-5D= UNIT RP FOR RP-TO-R SUBR.
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STCALL ALPHAV # ALPHAV +4= SINL FOR SETRE SUBR.
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SETRE # RE METERS B-29
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DLOAD BOFF # SET MPAC=0 FOR EARTH, NON-ZERO FOR MOON
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DLOAD BOFF # SET MPAC=0 FOR EARTH,NON-ZERO FOR MOON
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ZEROVEC
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LUNAFLAG
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CALLRPRT
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@ -154,13 +153,14 @@ CALLRPRT CALL
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VSL1 # R METERS B-29
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STCALL ALPHAV # EXIT WITH R IN METERS B-29
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INCORPEX
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# SUBROUTINE TO COMPUTE EARTH RADIUS
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#
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# INPUT
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#
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# 1/2 SIN LAT IN ALPHAV +4
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#
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# OUTPUT
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#
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# EARTH RADIUS IN ERADM AND MPAC (METERS B-29)
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GETERAD DLOAD DSQ
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@ -176,11 +176,10 @@ GETERAD DLOAD DSQ
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STORE ERADM
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RVQ
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# THE FOLLOWING CONSTANTS WERE COMPUTED WITH A=6378166, B=6356784 METERS
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# B2XSC = B**2 SCALED B-51
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# B2/A2 = B**2/A**2 SCALED B-1
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# EE = (1-B**2/A**2) SCALED B-0
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# THE FOLLOWING CONSTANTS WERE COMPUTED WITH A=6378166,B=6356784 METERS
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# B2XSC= B**2 SCALED B-51
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# B2/A2= B**2/A**2 SCALED B-1
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# EE=(1-B**2/A**2) SCALED B-0
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B2XSC 2DEC .0179450689 # B**2 SCALED B-51
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DP1/2 = XUNIT
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B2/A2 2DEC .9933064884 B-1 # GAMMA= B**2/A**2 B-1
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@ -190,6 +189,7 @@ EE 2DEC 6.6935116 E-3 # (1-B**2/A**2) B-0
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# ARCTAN SUBROUTINE
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#
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# CALLING SEQUENCE
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#
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# SIN THETA IN SINTH B-1
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# COS THETA IN COSTH B-1
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# CALL ARCTAN
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@ -234,7 +234,7 @@ ATAN=90 DLOAD SIGN
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2DZERO = DPZERO
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# Page 1138
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# ***** SETGAMMA SUBROUTINE *****
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# ..... SETGAMMA SUBROUTINE .....
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# SUBROUTINE TO SET GAMMA FOR THE LAT-LONG AND LALOTORV SUBROUTINES
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#
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# GAMMA = B**2/A**2 FOR EARTH (B-1)
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@ -245,7 +245,7 @@ ATAN=90 DLOAD SIGN
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# L+1 SETGAMMA
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#
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# INPUT
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# LUNAFLAG=0 FOR EARTH, =1 FOR MOON
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# LUNAFLAG=0 FOR EARTH,=1 FOR MOON
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#
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# OUTPUT
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# GAMMA IN GAMRP (B-1)
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@ -261,11 +261,11 @@ SETGMEX STORE GAMRP
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GAMRP = 8D
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# Page 1139
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# ***** SETRE SUBROUTINE *****
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# .....SETRE SUBROUTINE .....
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# SUBROUTINE TO SET RE (EARTH OR MOON RADIUS)
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#
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# RE = RM FOR MOON
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# RE = RREF FOR FIXED EARTH RADIUS OR COMPUTED RF FOR FISCHER ELLIPSOID
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# RE= RM FOR MOON
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# RE= RREF FOR FIXED EARTH RADIUS OR COMPUTED RF FOR FISCHER ELLIPSOID
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#
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# CALLING SEQUENCE
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# L CALL
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@ -275,13 +275,13 @@ GAMRP = 8D
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# GETERAD
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#
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# INPUT
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# ERADFLAG = 0 FOR FIXED RE, 1 FOR COMPUTED RE
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# ALPHAV +4 = 1/2 SINL IF GETERAD IS CALLED
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# LUNAFLAG = 0 FOR EARTH, =1 FOR MOON
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# ERADFLAG=0 FOR FIXED RE, 1 FOR COMPUTED RE
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# ALPHAV +4= 1/2 SINL IF GETERAD IS CALLED
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# LUNAFLAG=0 FOR EARTH,=1 FOR MOON
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#
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# OUTPUT
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# ERADM = 504RM FOR MOON (METERS B-29)
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# ERADM = ERAD OR COMPUTED RE FOR EARTH (METERS B-29)
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# ERADM= 504RM FOR MOON (METERS B-29)
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# ERADM= ERAD OR COMPUTED RE FOR EARTH (METERS B-29)
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SETRE STQ DLOAD
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SETREX
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@ -290,13 +290,13 @@ SETRE STQ DLOAD
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LUNAFLAG
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TSTRLSRM
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ERAD
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BOFF CALL # ERADFLAG=0 FOR FIXED RE, 1 FOR COMPUTED
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BOFF CALL # ERADFLAG=0 FOR FIXED RE,1 FOR COMPUTED
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ERADFLAG
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SETRXX
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GETERAD
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SETRXX STCALL ERADM # EXIT WITH RE OR RM METERS B-29
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SETREX
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TSTRLSRM BON VLOAD # ERADFLAG=0, SET R0=RLS
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TSTRLSRM BON VLOAD # ERADFLAG=0,SET R0=RLS
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ERADFLAG # =1 R0=RM
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SETRXX
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RLS
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@ -304,5 +304,3 @@ TSTRLSRM BON VLOAD # ERADFLAG=0, SET R0=RLS
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GOTO
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SETRXX
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SETREX = S2
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