SUBROUTINE TCI_MJD2TAI( MJD, TAI ) *+ * Name: * TCI_MJD2TAI * Purpose: * Convert Modified Julian Day (MJD) to International Atomic Time (TAI) * Language: * Starlink Fortran * Invocation: * CALL TCI_MJD2TAI( MJD, TAI ) * Description: * Converts a decimal MJD to international atomic time (TAI). Takes leap * seconds into account. * Arguments: * MJD = DOUBLE PRECISION (given) * The Modified Julian Day * TAI = DOUBLE PRECISION (returned) * The International Atomic Time in days * Examples: * {routine_example_text} * {routine_example_description} * Pitfalls: * {pitfall_description}... * Notes: * {routine_notes}... * Prior Requirements: * {routine_prior_requirements}... * Side Effects: * {routine_side_effects}... * Algorithm: * {algorithm_description}... * Accuracy: * {routine_accuracy} * Timing: * {routine_timing} * External Routines Used: * {name_of_facility_or_package}: * {routine_used}... * Implementation Deficiencies: * {routine_deficiencies}... * References: * TCI Subroutine Guide : http://www.sr.bham.ac.uk/asterix-docs/Programmer/Guides/tci.html * Keywords: * package:tci, usage:public * Copyright: * Copyright (C) University of Birmingham, 1995 * Authors: * DJA: David J. Allan (ROSAT, University of Birmingham) * {enter_new_authors_here} * History: * 24 Jul 1991 (DJA): * Original version. * {enter_changes_here} * Bugs: * {note_any_bugs_here} *- * Type Definitions: IMPLICIT NONE ! No implicit typing * Arguments Given: DOUBLE PRECISION MJD * Arguments Returned: DOUBLE PRECISION TAI * External References: EXTERNAL SLA_DAT DOUBLE PRECISION SLA_DAT ! Leap seconds routine * Local Constants: DOUBLE PRECISION LEAPS_AT_1970 PARAMETER ( LEAPS_AT_1970 = 10.0D0 ) DOUBLE PRECISION MJD_AT_1970 PARAMETER ( MJD_AT_1970 = 41317.0D0 ) DOUBLE PRECISION SECONDS_IN_DAY PARAMETER ( SECONDS_IN_DAY = 86400.0D0 ) *. * Find atomic time TAI = MJD + : ((SLA_DAT(MJD)-LEAPS_AT_1970)/SECONDS_IN_DAY) - : MJD_AT_1970 END