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C %P%
* file tmisc.for v 4.2.1
C$$MJD LAST MODIFICATION: 06SEP89 BY MSS
C
INTEGER*4 FUNCTION MJD( IYR, IMO, IDA )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: MJD
C VERSION: 8908.02
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: CONVERT DATE TO MODIFIED JULIAN DATE
C
C INPUT PARAMETERS FROM THE ARGUEMENT LIST:
C -----------------------------------------
C IYR YEAR
C IMO MONTH
C IDA DAY
C
C OUTPUT PARAMETERS FROM ARGUEMENT LIST:
C --------------------------------------
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE
C
C THIS MODULE CALLS: DINT
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES: DUFFETT-SMITH, PETER 1982, "PRACTICAL
C ASTRONOMY WITH YOUR CALCULATOR", 2ND
C EDITION, CAMBRIDGE UNIVERSITY PRESS,
C NEW YORK, P.9
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C::MJD
C
IMPLICIT REAL*8 (A-H, O-Z)
IMPLICIT INTEGER (I-N)
INTEGER*4 A, B, C, D
CHARACTER*99 SCCSID
COMMON/UNITS/ LUNIT
C SCCSID="$Id: tmisc.for 81724 2014-12-22 16:17:53Z jarir.saleh $ 20$Date: 2007/11/09 11:19:10 $ NGS"
C
C........ 0.0 EXPLICIT INITIALIZATION
C
IYRP= IYR
IF( IYR.LT.1900 ) IYRP= IYR + 1900
IF(IYR.LT.20) IYRP = IYR + 2000
IMOP= IMO
IF( IMO .LT. 3 ) THEN
IYRP= IYRP - 1
IMOP= IMOP + 12
END IF
C
C........ 1.0 CALCULATION
C
A= IYRP * 0.01D0
B= 2 - A + DINT( A*0.25D0 )
C= 365.25D0 * IYRP
D= 30.6001D0 * (IMOP+1)
MJD= B + C + D + IDA - 679006
C
* WRITE(LUNIT,50) IYRP,IMOP,IDA
* 50 FORMAT(' IYRP,IMOP,IDA= ',i4,2x,i2,2x,i2)
* WRITE(LUNIT,55) A,B,C,D,MJD
* 55 FORMAT(' A,B,C,D,MJD= ',i4,2x,i4,2x,i7,2x,i4,2x,i12)
RETURN
END
C$$DECDAY LAST MODIFICATION: 31AUG89 BY MSS
C
REAL*8 FUNCTION DECDAY( IHR, IMI, SEC )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: DECDAY
C VERSION: 8908.02
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: CONVERT TIME TO DECIMAL DAY
C
C INPUT PARAMETERS FROM THE ARGUEMENT LIST:
C -----------------------------------------
C IHR HOUR
C IMI MINUTE
C SEC SECOND
C
C OUTPUT PARAMETERS FROM ARGUEMENT LIST:
C --------------------------------------
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE
C
C THIS MODULE CALLS:
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES:
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C::DECDAY
C
IMPLICIT REAL*8 (A-H, O-Z)
C
DECDAY= ((SEC/60.0D0 + IMI)/60.0D0 + IHR)/24.0D0
C
RETURN
END
CB::LPSEC
C
SUBROUTINE LPSEC( TH, TL, UTCTAI, GPSUTC )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: LPSEC
C VERSION: 8912.27
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: DETERMINE UTC - TAI, AND GPS - UTC FOR A DESIRED EPOCH
C
C INPUT PARAMETERS FROM THE ARGUEMENT LIST:
C -----------------------------------------
C TH DATE [JULIAN OR MODIFIED JULIAN DATE]
C TL UTC TIME [DECIMAL DAYS]
C
C OUTPUT PARAMETERS FROM ARGUEMENT LIST:
C --------------------------------------
C UTCTAI DIFFERENCE UTC - TAI
C GPSUTC DIFFERENCE GPS - UTC
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C TMPH DATE USED [MJD]
C TMPL TIME USED [DECIMAL DAY]
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE
C
C THIS MODULE CALLS:
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES:
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C::MODIFICATION HISTORY
C::8908.31, MSS, DOC. STD. IMPLIMENTED
C::8912.27, MSS, NEW STD. IMPLIMENTED, TIME->TH&TL, MJD OR JD
C********1*********2*********3*********4*********5*********6*********7**
CE::LPSEC
C
IMPLICIT REAL*8 (A-H, O-Z)
C
INTEGER*4 TH, TMPH
C
C........ 0.0 EXPLICIT INITIALIZATION - VALUES GOOD FROM 01JUL81
C
GPSUTC = 0
UTCTAI =-19.D0
C
IF( TH.GT.2400000 ) THEN
TMPH= TH - 2400000
TMPL= TL - 0.5D0
ELSE
TMPH= TH
TMPL= TL
ENDIF
TMPH= TMPH + DINT(TMPL)
TMPL= TMPL - DINT(TMPL)
IF( TMPL.LT.0 ) THEN
TMPH= TMPH - 1
TMPL= TMPL + 1.D0
ENDIF
C
IF( TMPH.LT.44239 ) THEN
C WRITE( *, 100 ) TH+TL
100 FORMAT( T2, 'LPSEC: ', F15.5, ' BEFORE EARLIEST TIME',
$ ' = 44239 = 01JAN80' )
RETURN
ENDIF
C
C........ 1.0 01JAN82
C
IF( TMPH.LT.44970 ) RETURN
GPSUTC= GPSUTC + 1.D0
UTCTAI= UTCTAI - 1.D0
C
C........ 2.0 01JUL82
C
IF( TMPH.LT.45151 ) RETURN
GPSUTC= GPSUTC + 1.D0
UTCTAI= UTCTAI - 1.D0
C
C........ 3.0 01JUL83
C
IF( TMPH.LT.45516 ) RETURN
GPSUTC= GPSUTC + 1.D0
UTCTAI= UTCTAI - 1.D0
C
C........ 4.0 01JUL85
C
IF( TMPH.LT.46247 ) RETURN
GPSUTC= GPSUTC + 1.D0
UTCTAI= UTCTAI - 1.D0
C
C........ 5.0 01JAN88
C
IF( TMPH.LT.47161 ) RETURN
GPSUTC= GPSUTC + 1.D0
UTCTAI= UTCTAI - 1.D0
C
C........ 6.0 01JAN90
C
IF( TMPH.LT.47892 ) RETURN
GPSUTC= GPSUTC + 1.D0
UTCTAI= UTCTAI - 1.D0
C
RETURN
END
CB::DMY
C
SUBROUTINE DMY( TH, TL, IYR, IMO, IDA, IHR, IMI, SEC )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: DMY
C VERSION: 8912.28
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: CONVERT DATE TO MODIFIED JULIAN DATE
C
C INPUT PARAMETERS FROM THE ARGUEMENT LIST:
C -----------------------------------------
C TH INTEGER (HIGH) PART OF DATE - (MODIFIED) JULIAN DATE
C TL FRACTIONAL (LOW) PART OF DATE - DECIMAL DAY
C
C OUTPUT PARAMETERS FROM ARGUEMENT LIST:
C --------------------------------------
C IYR YEAR
C IMO MONTH
C IDA DAY
C IHR HOUR
C IMI MINUTE
C SEC SECOND
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE
C
C THIS MODULE CALLS:
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES: DUFFETT-SMITH, PETER 1982, "PRACTICAL
C ASTRONOMY WITH YOUR CALCULATOR", 2ND
C EDITION, CAMBRIDGE UNIVERSITY PRESS,
C NEW YORK, P.9
C
C COMMENTS: THIS SUBROUTINE IS LIMITED BY THE SIZE
C OF THE A REAL*8 VARIABLE. ACCURACY OF
C THE FRACTION SECONDS VALUE IS LIMITED
C TO APPROXIMATELY 1 MICROSECOND.
C
C********1*********2*********3*********4*********5*********6*********7**
C::MODIFICATION HISTORY
C::8908.31, MSS, DOC. STD. IMPLIMENTED
C::8912.28, MSS, HANDLES TL<0
C********1*********2*********3*********4*********5*********6*********7**
CE::DMY
C
IMPLICIT REAL*8 (A-H, O-Z)
C
INTEGER*4 A, B, C, D, E, G, I, TH
C
C........ 0.0 EXPLICIT INITIALIZATION
C
I= TH
IF( TH.LT.2400001 ) THEN
I= TH + 2400001
ELSE
I= TH + 1
ENDIF
F= TL
I= I+DINT(TL)
F= F-DINT(TL)
IF( F.LT.0 ) THEN
I= I - 1
F= F + 1.D0
ENDIF
C
C........ 1.0 CONVERT DATE
C
A= I
IF( I .GT. 2299160 ) A = (I-1867216.25D0)/36524.25D0
B= I + 1 + A - DINT( A*0.25D0 )
C= B + 1524
D= (C-122.1D0)/365.25D0
E= 365.25D0*D
G= (C-E)/30.6001D0
C
I= 30.6001D0 * G
IDA= DINT(C - E + F - I)
C
IMO= G - 1.0D0
IF( G .GT. 13.5D0 ) IMO = G - 13.0D0
C
IYR= D - 6615.0D0
IF( IMO .GT. 2.5D0 ) IYR = D - 6616.0D0
C
C........ 2.0 CONVERT TIME
C
TEMP= F * 24.0D0
IHR= TEMP
TEMP= (TEMP-IHR)*60.0D0
IMI= TEMP
SEC= (TEMP-IMI)*60.0D0
C
RETURN
END
C$$IGPSWK
C
INTEGER FUNCTION IGPSWK( TIMEH, TIMEL, SECWK )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: IGPSWK
C VERSION: IGPS03
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: CONVERT MODIFIED JULIAN DATE TO GPS WEEK AND SECONDS-
C OF-WEEK
C
C INPUT PARAMETERS FROM THE ARGUEMENT LIST:
C -----------------------------------------
C TIMEH INTEGRAL (HIGH) PART OF DATE (MODIFIED JULIAN DATE)
C TIMEL FRACTIONAL (LOW) PART OF DATE (DECIMAL DAYS)
C
C OUTPUT PARAMETERS FROM ARGUEMENT LIST:
C --------------------------------------
C SECWK SECONDS INTO THE WEEK
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE
C
C THIS MODULE CALLS: DINT
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES: DUFFETT-SMITH, PETER 1982, "PRACTICAL
C ASTRONOMY WITH YOUR CALCULATOR", 2ND
C EDITION, CAMBRIDGE UNIVERSITY PRESS,
C NEW YORK, P.12
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C::IGPSWK
C
IMPLICIT REAL*8 (A-H, O-Z)
C
INTEGER*4 TIMEH
C
DATA D2S/ 8.64D4 /, W2D/ 7.D0 /, WKOFF/ 349178.D0 /
DATA P_J2M/ 2400002.D0 /
C
IGPSWK= DINT( (TIMEH + P_J2M)/W2D - WKOFF )
SECWK= (TIMEH - ((IGPSWK + WKOFF)*W2D - P_J2M) + TIMEL)*D2S
C
RETURN
END
C$$NORMJD LAST MODIFICATION: 31AUG89 BY MSS
C
SUBROUTINE NORMJD( TIMEH, TIMEL )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: NORMJD
C VERSION: 8908.02
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: NORMALIZE (MODIFIED) JULIAN DATE
C
C INPUT PARAMETERS FROM THE ARGUEMENT LIST:
C -----------------------------------------
C TIMEH INTEGER (HIGH) PORTION OF DATE
C TIMEL FRACTIONAL (LOW) PORTION OF DATE
C
C OUTPUT PARAMETERS FROM ARGUEMENT LIST:
C --------------------------------------
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE
C
C THIS MODULE CALLS: DINT
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES:
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C::NORMJD
C
INTEGER*4 TIMEH
REAL*8 TIMEL
C
TIMEH= TIMEH + DINT(TIMEL)
TIMEL= TIMEL - DINT(TIMEL)
C
RETURN
END
CB::TGT
C
LOGICAL FUNCTION TGT( TH1, TL1, TH2, TL2 )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: TGT
C VERSION: TGTX.01
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: DETERMINE IF TIME 1 IS GREATER THAN TIME 2
C
C INPUT PARAMETERS:
C -----------------
C TH1 HIGH PART OF TIME 1 [MJD] (I*4)
C TL1 LOW PART OF TIME 1 [DECIMAL DAY] (D)
C TH2 HIGH PART OF TIME 2 [MJD] (I*4)
C TL2 LOW PART OF TIME 2 [DECIMAL DAY] (D)
C
C OUTPUT PARAMETERS:
C ------------------
C TGT IF TIME 1 > TIME 2 = .TRUE., ELSE = .FALSE. (L)
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE IN PAGE AND PREP
C
C THIS MODULE CALLS:
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES:
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C MODIFICATION HISTORY:
C::8910.18, MSS, CREATION
C********1*********2*********3*********4*********5*********6*********7**
CE::TGT
C
IMPLICIT DOUBLE PRECISION (A-H, O-Z)
C
DOUBLE PRECISION TL1, TL2
INTEGER*4 TH1, TH2
C
IF( (TH1.GT.TH2) .OR. (TH1.EQ.TH2 .AND. TL1.GT.TL2) ) THEN
TGT= .TRUE.
ELSE
TGT= .FALSE.
ENDIF
C
RETURN
END
CB::TGE
C
LOGICAL FUNCTION TGE( TH1, TL1, TH2, TL2 )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: TGE
C VERSION: TGEX.01
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: DETERMINE IF TIME 1 IS GREATER THAN OR EQUAL TO TIME 2
C
C INPUT PARAMETERS:
C -----------------
C TH1 HIGH PART OF TIME 1 [MJD] (I*4)
C TL1 LOW PART OF TIME 1 [DECIMAL DAY] (D)
C TH2 HIGH PART OF TIME 2 [MJD] (I*4)
C TL2 LOW PART OF TIME 2 [DECIMAL DAY] (D)
C
C OUTPUT PARAMETERS:
C ------------------
C TGE IF TIME 1 >= TIME 2 = .TRUE., ELSE = .FALSE. (L)
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE IN PAGE AND PREP
C
C THIS MODULE CALLS:
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES:
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C MODIFICATION HISTORY:
C::8910.18, MSS, CREATION
C********1*********2*********3*********4*********5*********6*********7**
CE::TGE
C
IMPLICIT DOUBLE PRECISION (A-H, O-Z)
C
DOUBLE PRECISION TL1, TL2
INTEGER*4 TH1, TH2
C
IF( (TH1.GT.TH2) .OR. (TH1.EQ.TH2 .AND. TL1.GE.TL2) ) THEN
TGE= .TRUE.
ELSE
TGE= .FALSE.
ENDIF
C
RETURN
END
CB::TEQ
C
LOGICAL FUNCTION TEQ( TH1, TL1, TH2, TL2 )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: TEQ
C VERSION: TEQX.01
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: DETERMINE IF TIME 1 IS EQUAL TO TIME 2
C
C INPUT PARAMETERS:
C -----------------
C TH1 HIGH PART OF TIME 1 [MJD] (I*4)
C TL1 LOW PART OF TIME 1 [DECIMAL DAY] (D)
C TH2 HIGH PART OF TIME 2 [MJD] (I*4)
C TL2 LOW PART OF TIME 2 [DECIMAL DAY] (D)
C
C OUTPUT PARAMETERS:
C ------------------
C TEQ IF TIME 1 = TIME 2 = .TRUE., ELSE = .FALSE. (L)
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE IN PAGE AND PREP
C
C THIS MODULE CALLS:
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES:
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C MODIFICATION HISTORY:
C::8910.18, MSS, CREATION
C********1*********2*********3*********4*********5*********6*********7**
CE::TEQ
C
IMPLICIT DOUBLE PRECISION (A-H, O-Z)
C
DOUBLE PRECISION TL1, TL2
INTEGER*4 TH1, TH2
C
IF( (TH1.EQ.TH2) .AND. (TL1.EQ.TL2) ) THEN
TEQ= .TRUE.
ELSE
TEQ= .FALSE.
ENDIF
C
RETURN
END
CB::TNE
C
LOGICAL FUNCTION TNE( TH1, TL1, TH2, TL2 )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: TNE
C VERSION: TNEX.01
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: DETERMINE IF TIME 1 IS EQUAL TO TIME 2
C
C INPUT PARAMETERS:
C -----------------
C TH1 HIGH PART OF TIME 1 [MJD] (I*4)
C TL1 LOW PART OF TIME 1 [DECIMAL DAY] (D)
C TH2 HIGH PART OF TIME 2 [MJD] (I*4)
C TL2 LOW PART OF TIME 2 [DECIMAL DAY] (D)
C
C OUTPUT PARAMETERS:
C ------------------
C TNE IF TIME 1 < TIME 2 OR TIME1 < TIME 2 = .TRUE., (L)
C ELSE = .FALSE.
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE IN PAGE AND PREP
C
C THIS MODULE CALLS:
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES:
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C MODIFICATION HISTORY:
C::8910.18, MSS, CREATION
C********1*********2*********3*********4*********5*********6*********7**
CE::TNE
C
IMPLICIT DOUBLE PRECISION (A-H, O-Z)
C
DOUBLE PRECISION TL1, TL2
INTEGER*4 TH1, TH2
C
IF( (TH1.NE.TH2) .OR. (TL1.NE.TL2) ) THEN
TNE= .TRUE.
ELSE
TNE= .FALSE.
ENDIF
C
RETURN
END
CB::TLE
C
LOGICAL FUNCTION TLE( TH1, TL1, TH2, TL2 )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: TLE
C VERSION: TLEX.01
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: DETERMINE IF TIME 1 IS LESS THAN OR EQUAL TO TIME 2
C
C INPUT PARAMETERS:
C -----------------
C TH1 HIGH PART OF TIME 1 [MJD] (I*4)
C TL1 LOW PART OF TIME 1 [DECIMAL DAY] (D)
C TH2 HIGH PART OF TIME 2 [MJD] (I*4)
C TL2 LOW PART OF TIME 2 [DECIMAL DAY] (D)
C
C OUTPUT PARAMETERS:
C ------------------
C TLE IF TIME 1 >= TIME 2 = .TRUE., ELSE = .FALSE (L)
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE IN PAGE AND PREP
C
C THIS MODULE CALLS:
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES:
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C MODIFICATION HISTORY:
C::8910.18, MSS, CREATION
C********1*********2*********3*********4*********5*********6*********7**
CE::TLE
C
IMPLICIT DOUBLE PRECISION (A-H, O-Z)
C
DOUBLE PRECISION TL1, TL2
INTEGER*4 TH1, TH2
C
IF( (TH1.LT.TH2) .OR. (TH1.EQ.TH2 .AND. TL1.LE.TL2) ) THEN
TLE= .TRUE.
ELSE
TLE= .FALSE.
ENDIF
C
RETURN
END
CB::TLT
C
LOGICAL FUNCTION TLT( TH1, TL1, TH2, TL2 )
C
C********1*********2*********3*********4*********5*********6*********7**
C
C NAME: TLT
C VERSION: TLTX.01
C WRITTEN BY: M. SCHENEWERK
C PURPOSE: DETERMINE IF TIME 1 IS LESS THAN TIME 2
C
C INPUT PARAMETERS:
C -----------------
C TH1 HIGH PART OF TIME 1 [MJD] (I*4)
C TL1 LOW PART OF TIME 1 [DECIMAL DAY] (D)
C TH2 HIGH PART OF TIME 2 [MJD] (I*4)
C TL2 LOW PART OF TIME 2 [DECIMAL DAY] (D)
C
C OUTPUT PARAMETERS:
C ------------------
C TLT IF TIME 1 > TIME 2 = .TRUE., ELSE = .FALSE (L)
C
C
C LOCAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C GLOBAL VARIABLES AND CONSTANTS:
C ------------------------------
C
C
C THIS MODULE CALLED BY: GENERAL USE IN PAGE AND PREP
C
C THIS MODULE CALLS:
C
C INCLUDE FILES USED:
C
C COMMON BLOCKS USED:
C
C REFERENCES:
C
C COMMENTS:
C
C********1*********2*********3*********4*********5*********6*********7**
C MODIFICATION HISTORY:
C::8910.18, MSS, CREATION
C********1*********2*********3*********4*********5*********6*********7**
CE::TLT
C
IMPLICIT DOUBLE PRECISION (A-H, O-Z)
C
DOUBLE PRECISION TL1, TL2
INTEGER*4 TH1, TH2
C
IF( (TH1.LT.TH2) .OR. (TH1.EQ.TH2 .AND. TL1.LT.TL2) ) THEN
TLT= .TRUE.
ELSE
TLT= .FALSE.
ENDIF
C
RETURN
END