将日期秒过去J2000历元

date2et - Converts a date to seconds past j2000 epoch The currently used standard epoch is J2000.0, which is January 1, 2000 at 12:00 TT. The prefix "J" indicates that it is a Julian epoch. The previous standard epoch was B1950.0, with the prefix "B" indicating it was a Besselian epoch. v.0.1 August 2006 -Author Robert M. Hovden et2date - Converts seconds past j2000 epoch to a date The date string returned is in the form: YYYY MON DD HR:MN:SC.### (UTC) ::UTC The currently used standard epoch is J2000.0, which is January 1, 2000 at 12:00 TT. The prefix "J" indicates that it is a Julian epoch. The previous standard epoch was B1950.0, with the prefix "B" indicating it was a Besselian epoch. v.0.1 August 2006 -Author Robert M. Hovden

converttime
naif0008.tls.dos
et2date.c
mkprduct.bat
date2et.c