THIS SUBROUTINE COMPUTES THE TERRESTRIAL TIME (TT) JULIAN DATE CORRESPONDING TO A BARYCENTRIC DYNAMICAL TIME (TDB) JULIAN DATE. THE EXPRESSION USED IN THIS VERSION IS A TRUNCATED FORM OF A LONGER AND MORE PRECISE SERIES GIVEN BY FAIRHEAD & BRETAGNON (1990) A&A 229, 240. THE RESULT IS GOOD TO ABOUT 10 MICROSECONDS.
TDBJD = TDB JULIAN DATE (IN)
TTJD = TT JULIAN DATE (OUT)
SECDIF = DIFFERENCE TDBJD-TTJD, IN SECONDS (OUT)
Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
real(kind=wp) | :: | tdbjd | ||||
real(kind=wp) | :: | ttjd | ||||
real(kind=wp) | :: | secdif |