|
subroutine igrf_sub(xlat,xlong,year,height, |
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|
& xl,icode,dip,dec) |
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|
c---------------------------------------------------------------- |
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|
c INPUT: |
|
|
c xlat geodatic latitude in degrees |
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|
c xlong geodatic longitude in degrees |
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|
c year decimal year (year+month/12.0-0.5 or year+day-of-year/365 |
|
|
c or 366 if leap year) |
|
|
c height height in km |
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|
c OUTPUT: |
|
|
c xl L value |
|
|
c icode =1 L is correct; =2 L is not correct; |
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|
c =3 an approximation is used |
|
|
c dip geomagnetic inclination in degrees |
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|
c dec geomagnetic declination in degress |
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|
c---------------------------------------------------------------- |
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|
|
|
REAL LATI,LONGI |
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|
COMMON/GENER/ UMR,ERA,AQUAD,BQUAD |
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|
SAVE /GENER/ |
|
1 |
C |
C |
|
CALL INITIZE |
|
|
ibbb=0 |
|
|
ALOG2=ALOG(2.) |
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|
ISTART=1 |
|
|
lati=xlat |
|
|
longi=xlong |
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|
c |
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|
C----------------CALCULATE PROFILES----------------------------------- |
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|
c |
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|
CALL FELDCOF(YEAR,DIMO) |
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|
CALL FELDG(LATI,LONGI,HEIGHT,BNORTH,BEAST,BDOWN,BABS) |
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|
CALL SHELLG(LATI,LONGI,HEIGHT,DIMO,XL,ICODE,BAB1) |
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DIP=ASIN(BDOWN/BABS)/UMR |
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DEC=ASIN(BEAST/SQRT(BEAST*BEAST+BNORTH*BNORTH))/UMR |
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RETURN |
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END |
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|
c |
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c |
|
2 |
C SHELLIG.FOR, Version 2.0, January 1992 |
C SHELLIG.FOR, Version 2.0, January 1992 |
3 |
C |
C |
4 |
C 11/01/91-DKB- SHELLG: lowest starting point for B0 search is 2 |
C 11/01/91-DKB- SHELLG: lowest starting point for B0 search is 2 |
158 |
SAVE /FIDB0/ |
SAVE /FIDB0/ |
159 |
COMMON/GENER/ UMR,ERA,AQUAD,BQUAD |
COMMON/GENER/ UMR,ERA,AQUAD,BQUAD |
160 |
SAVE /GENER/ |
SAVE /GENER/ |
161 |
|
REAL FLS |
162 |
C |
C |
163 |
C-- RMIN, RMAX ARE BOUNDARIES FOR IDENTIFICATION OF ICODE=2 AND 3 |
C-- RMIN, RMAX ARE BOUNDARIES FOR IDENTIFICATION OF ICODE=2 AND 3 |
164 |
C-- STEP IS STEP SIZE FOR FIELD LINE TRACING |
C-- STEP IS STEP SIZE FOR FIELD LINE TRACING |
166 |
C |
C |
167 |
DATA RMIN,RMAX /0.05,1.01/ |
DATA RMIN,RMAX /0.05,1.01/ |
168 |
DATA STEP,STEQ /0.20,0.03/ |
DATA STEP,STEQ /0.20,0.03/ |
169 |
BEQU=1.E10 |
BEQU=1.E10 |
170 |
|
FLS = FL |
171 |
C*****ENTRY POINT SHELLG TO BE USED WITH GEODETIC CO-ORDINATES |
C*****ENTRY POINT SHELLG TO BE USED WITH GEODETIC CO-ORDINATES |
172 |
RLAT=GLAT*UMR |
RLAT=GLAT*UMR |
173 |
CT=SIN(RLAT) |
CT=SIN(RLAT) |
268 |
HLI=0.5*(((C3*T+C2)*T+C1)*T+C0) |
HLI=0.5*(((C3*T+C2)*T+C1)*T+C0) |
269 |
ZQ=Z*Z |
ZQ=Z*Z |
270 |
R=HLI+SQRT(HLI*HLI+ZQ) |
R=HLI+SQRT(HLI*HLI+ZQ) |
271 |
|
IF(R.NE.R)THEN |
272 |
|
FL = FLS |
273 |
|
RETURN |
274 |
|
ENDIF |
275 |
IF(R.LE.RMIN)GOTO30 |
IF(R.LE.RMIN)GOTO30 |
276 |
RQ=R*R |
RQ=R*R |
277 |
FF=SQRT(1.+3.*ZQ/RQ) |
FF=SQRT(1.+3.*ZQ/RQ) |
548 |
C----------------------------------------------------------------------- |
C----------------------------------------------------------------------- |
549 |
CHARACTER*258 FIL1, FIL2 |
CHARACTER*258 FIL1, FIL2 |
550 |
CHARACTER*258 FILMOD |
CHARACTER*258 FILMOD |
551 |
C ### FILMOD, DTEMOD arrays +1 |
DIMENSION GH1(196),GH2(196),GHA(196),FILMOD(2) |
|
c DIMENSION GH1(144),GH2(120),GHA(144),FILMOD(14),DTEMOD(14) |
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|
DIMENSION GH1(196),GH2(196),GHA(196),FILMOD(3),DTEMOD(3) |
|
552 |
DOUBLE PRECISION X,F0,F |
DOUBLE PRECISION X,F0,F |
553 |
INTEGER L1,L2,L3 |
INTEGER L1,L2,I1 |
554 |
INTEGER NMAX |
INTEGER NMAX |
555 |
REAL TIME |
REAL TIME |
556 |
CHARACTER *258 P1,P2,P3 |
CHARACTER *258 P1,P2 |
557 |
COMMON/PPATH/ L1,L2,L3,P1, P2, P3 |
COMMON/PPATH/ I1,L1,L2,P1,P2 |
558 |
SAVE/PPATH/ |
SAVE/PPATH/ |
559 |
COMMON/MODEL/ GH1,NMAX,TIME,FIL1 |
COMMON/MODEL/ GH1,NMAX,TIME,FIL1 |
560 |
SAVE/MODEL/ |
SAVE/MODEL/ |
561 |
COMMON/GENER/ UMR,ERAD,AQUAD,BQUAD |
COMMON/GENER/ UMR,ERAD,AQUAD,BQUAD |
562 |
SAVE/GENER/ |
SAVE/GENER/ |
|
C ### updated to 2005 |
|
|
C CHARACTER COEFPATH*80, COEF1*80, COEF2*80, COEF3*80 |
|
|
|
|
|
c COEFPATH = 'OrbitalInfo/src/' |
|
|
c COEF1 = 'dgrf00.dat' |
|
|
c COEF2 = 'igrf05.dat' |
|
|
c COEF3 = 'igrf05s.dat' |
|
|
c COEF1 = COEFPATH(1:16)//COEF1 |
|
|
c COEF2 = COEFPATH(1:16)//COEF2 |
|
|
c COEF3 = COEFPATH(1:16)//COEF3 |
|
|
c FILMOD(1) = COEF1 |
|
|
c FILMOD(2) = COEF2 |
|
|
c FILMOD(3) = COEF3 |
|
563 |
c print *, "qui" |
c print *, "qui" |
564 |
FILMOD(1) = P1(1:L1) |
FILMOD(1) = P1(1:L1) |
565 |
FILMOD(2) = P2(1:L2) |
FILMOD(2) = P2(1:L2) |
|
FILMOD(3) = P3(1:L3) |
|
566 |
c print *, "qua" |
c print *, "qua" |
|
c FILMOD(1) = 'OrbitalInfo/src/dgrf00.dat' |
|
|
c FILMOD(2) = 'OrbitalInfo/src/igrf05.dat' |
|
|
c FILMOD(3) = 'OrbitalInfo/src/igrf05s.dat' |
|
|
c WRITE(*,*) FILMOD(1) |
|
|
c WRITE(*,*) FILMOD(2) |
|
|
c WRITE(*,*) FILMOD(3) |
|
|
c DATA FILMOD / 'dgrf00.dat', 'igrf05.dat', 'igrf05s.dat'/ |
|
|
DATA DTEMOD / 2005., 2010., 2015./ |
|
|
c |
|
|
c DATA FILMOD /'dgrf45.dat', 'dgrf50.dat', |
|
|
c 1 'dgrf55.dat', 'dgrf60.dat', 'dgrf65.dat', |
|
|
c 2 'dgrf70.dat', 'dgrf75.dat', 'dgrf80.dat', |
|
|
c 3 'dgrf85.dat', 'dgrf90.dat', 'dgrf95.dat', |
|
|
c 4 'dgrf00.dat','igrf05.dat','igrf05s.dat'/ |
|
|
c DATA DTEMOD / 1945., 1950., 1955., 1960., 1965., 1970., |
|
|
c 1 1975., 1980., 1985., 1990., 1995., 2000.,2005.,2010./ |
|
|
C |
|
|
C ### numye = numye + 1 ; is number of years represented by IGRF |
|
|
C |
|
|
c NUMYE=13 |
|
|
NUMYE=2 |
|
|
c print *, "quo" |
|
|
|
|
567 |
C |
C |
568 |
C IS=0 FOR SCHMIDT NORMALIZATION IS=1 GAUSS NORMALIZATION |
C IS=0 FOR SCHMIDT NORMALIZATION IS=1 GAUSS NORMALIZATION |
569 |
C IU IS INPUT UNIT NUMBER FOR IGRF COEFFICIENT SETS |
C IU IS INPUT UNIT NUMBER FOR IGRF COEFFICIENT SETS |
573 |
C-- DETERMINE IGRF-YEARS FOR INPUT-YEAR |
C-- DETERMINE IGRF-YEARS FOR INPUT-YEAR |
574 |
TIME = YEAR |
TIME = YEAR |
575 |
IYEA = INT(YEAR/5.)*5 |
IYEA = INT(YEAR/5.)*5 |
576 |
c L = (IYEA - 1945)/5 + 1 |
L = IYEA + 5 |
577 |
L = (IYEA - 2000)/5 + 1 |
C |
578 |
IF(L.LT.1) L=1 |
DTE1 = REAL(IYEA) |
579 |
IF(L.GT.NUMYE) L=NUMYE |
FIL1 = FILMOD(1) |
580 |
DTE1 = DTEMOD(L) |
DTE2 = REAL(L) |
581 |
FIL1 = FILMOD(L) |
FIL2 = FILMOD(2) |
582 |
DTE2 = DTEMOD(L+1) |
c print *,'IYEA ',IYEA,' L ',L |
|
FIL2 = FILMOD(L+1) |
|
583 |
c WRITE(*,*) FIL1 |
c WRITE(*,*) FIL1 |
584 |
c WRITE(*,*) FIL2 |
c WRITE(*,*) FIL2 |
585 |
c print *, "que" |
c print *, "que" |
591 |
IF (IER .NE. 0) STOP |
IF (IER .NE. 0) STOP |
592 |
c print *, "quj" |
c print *, "quj" |
593 |
C-- DETERMINE IGRF COEFFICIENTS FOR YEAR |
C-- DETERMINE IGRF COEFFICIENTS FOR YEAR |
594 |
IF (L .LE. NUMYE-1) THEN |
IF (I1.EQ.0) THEN |
595 |
CALL INTERSHC (YEAR, DTE1, NMAX1, GH1, DTE2, |
CALL INTERSHC (YEAR, DTE1, NMAX1, GH1, DTE2, |
596 |
1 NMAX2, GH2, NMAX, GHA) |
1 NMAX2, GH2, NMAX, GHA) |
597 |
ELSE |
ELSE |
605 |
F = GHA(J) * 1.D-5 |
F = GHA(J) * 1.D-5 |
606 |
F0 = F0 + F * F |
F0 = F0 + F * F |
607 |
1234 CONTINUE |
1234 CONTINUE |
608 |
DIMO = DSQRT(F0) |
DIMO = REAL(DSQRT(F0)) |
609 |
|
|
610 |
GH1(1) = 0.0 |
GH1(1) = 0.0 |
611 |
I=2 |
I=2 |
621 |
IF(IS.EQ.0) F0 = F0 * (2.D0 * X - 1.D0) / X |
IF(IS.EQ.0) F0 = F0 * (2.D0 * X - 1.D0) / X |
622 |
F = F0 * 0.5D0 |
F = F0 * 0.5D0 |
623 |
IF(IS.EQ.0) F = F * SQRT2 |
IF(IS.EQ.0) F = F * SQRT2 |
624 |
GH1(I) = GHA(I-1) * F0 |
GH1(I) = GHA(I-1) * REAL(F0) |
625 |
I = I+1 |
I = I+1 |
626 |
DO 9 M=1,N |
DO 9 M=1,N |
627 |
F = F * (X + M) / (X - M + 1.D0) |
F = F * (X + M) / (X - M + 1.D0) |
628 |
IF(IS.EQ.0) F = F * DSQRT((X - M + 1.D0) / (X + M)) |
IF(IS.EQ.0) F = F * DSQRT((X - M + 1.D0) / (X + M)) |
629 |
GH1(I) = GHA(I-1) * F |
GH1(I) = GHA(I-1) * REAL(F) |
630 |
GH1(I+1) = GHA(I) * F |
GH1(I+1) = GHA(I) * REAL(F) |
631 |
I=I+2 |
I=I+2 |
632 |
9 CONTINUE |
9 CONTINUE |
633 |
RETURN |
RETURN |
859 |
END |
END |
860 |
C |
C |
861 |
C |
C |
862 |
SUBROUTINE INITIZE(TP1,TL1,TP2,TL2,TP3,TL3) |
SUBROUTINE INITIZE(ISSEC,TP1,TL1,TP2,TL2) |
863 |
C---------------------------------------------------------------- |
C---------------------------------------------------------------- |
864 |
C Initializes the parameters in COMMON/GENER/ |
C Initializes the parameters in COMMON/GENER/ |
865 |
C |
C |
874 |
C ERA, EREQU and ERPOL as recommended by the INTERNATIONAL |
C ERA, EREQU and ERPOL as recommended by the INTERNATIONAL |
875 |
C ASTRONOMICAL UNION . |
C ASTRONOMICAL UNION . |
876 |
C----------------------------------------------------------------- |
C----------------------------------------------------------------- |
877 |
INTEGER TL1,TL2,TL3 |
INTEGER TL1,TL2,ISSEC |
878 |
CHARACTER (len=258) TP1,TP2,TP3 |
CHARACTER (len=*) :: TP1,TP2 |
879 |
INTEGER L1,L2,L3 |
INTEGER L1,L2 |
880 |
CHARACTER *258 P1,P2,P3 |
CHARACTER *258 P1,P2 |
881 |
COMMON/PPATH/ L1,L2,L3,P1, P2, P3 |
COMMON/PPATH/ I1,L1,L2,P1,P2 |
882 |
SAVE/PPATH/ |
SAVE/PPATH/ |
883 |
|
|
884 |
COMMON/GENER/UMR,ERA,AQUAD,BQUAD |
COMMON/GENER/UMR,ERA,AQUAD,BQUAD |
885 |
SAVE/GENER/ |
SAVE/GENER/ |
886 |
|
|
887 |
|
I1 = ISSEC |
888 |
L1 = TL1 |
L1 = TL1 |
889 |
L2 = TL2 |
L2 = TL2 |
890 |
L3 = TL3 |
|
891 |
P1 = TP1(1:L1) |
P1 = TP1(1:L1) |
892 |
P2 = TP2(1:L2) |
P2 = TP2(1:L2) |
|
P3 = TP3(1:L3) |
|
893 |
|
|
894 |
ERA=6371.2 |
ERA=6371.2 |
895 |
EREQU=6378.16 |
EREQU=6378.16 |