[IGSMAIL-4404]: PRN27 clock
Jim Ray (NGS 301-713-2850 x112)
jimr at ngs.noaa.gov
Wed May 28 05:03:26 PDT 2003
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IGS Electronic Mail 28 May 05:04:11 PDT 2003 Message Number 4404
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Author: Jim Ray
Users may have noticed that the PRN27 developed very severe clock problems
on 26 May. This can be seen in the IGS postscript plot at
<http://timescales.nrl.navy.mil/IGRT/1220/G27.timeplot.ps>.
The following NANU was subsequently issued:
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2003054
SUBJ: SVN27 (PRN27) UNUSABLE JDAY 146/1733 - UNTIL FURTHER NOTICE
1. NANU TYPE: UNUSUFN
NANU NUMBER: 2003054
NANU DTG: 261735Z MAY 2003
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 27
PRN: 27
START JDAY: 146
START TIME ZULU: 1733
START CALENDAR DATE: 26 MAY 2003
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A
2. CONDITION: GPS SATELLITE SVN27 (PRN27) WILL BE UNUSABLE ON JDAY 146
(26 MAY 2003) BEGINNING 1733 ZULU UNTIL FURTHER NOTICE.
3. POC: CIVILIAN - NAVCEN AT (703)313-5900, HTTP://WWW.NAVCEN.USCG.GOV
MILITARY - GPS Support Center, DSN 560-2541,
COMM 719-567-2493, GPS at SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS
--Jim
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