How accurately are the UT times determined?
(7/15/91)
GSOC tracks the real spacecraft time in the following manner: A time signal is uplinked, which starts a counter. At the next time signal interrupt, the spacecraft time and the counter total are transmitted to GSOC. This occurs about once a week. The time signal counter is used to correct the error between spacecraft time and UT, usually about 10 msec, to about 1 msec.
Select another question related to data analysis
Select another FAQ topic
Return to the ROSAT GOF
Please use the Feedback link if you have questions on ROSAT.