India has just launched the third of its seven Indian Regional Navigation Satellite System (IRNSS) satellites. IRNSS uses its own reference time scale IRNSS Network Timing (IRNWT) which has two centers (I and II) each of which maintain two time scale (A and B).
According to http://www.isro.org/Tender/Istrac/ISTRAC-05-2013-14.pdf section 3.1.14 a. The definition of epoch for IRNWT-II will be similar to GALILEO start of epoch and GPS roll over. b. IRNWT start epoch 00:00:00 (WN= 0, TOW= 0) shall be 1999-08- 21T23:59:47 UTC. The time format is similar to GPS i.e week number and time of week modulo 604800. c. At the start epoch, TAI shall be ahead of IRNWT-II by 32 leap seconds and IRNWT will deviate less than 20 ns from TAI. I'll be modifying my time scales plots to show IRNWT at the same offset as the earlier incarnation of the BeiDou System Time. Welcome to the new member of the time scale club. -- Steve Allen <[email protected]> WGS-84 (GPS) UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m _______________________________________________ LEAPSECS mailing list [email protected] https://pairlist6.pair.net/mailman/listinfo/leapsecs
