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-----Original Message----- From: [log in to unmask] [mailto:[log in to unmask]] On Behalf Of Schlechte, Gene Sent: 14 February 2008 21:51 To: [log in to unmask] Subject: RE: CGSIC: PRN32 expected to be set Healthy on 19FEB2008 To CGSIC Registered Members email distribution: John Owen kindly corrected my last email concerning the use of PRN32 in his email that follows this one. GPS has used PRN32 once before on an operational satellite. I asked the GPS Operations Center and have been told that PRN32 was used between 1992 and 1993 and then it was changed to a different PRN after it was discovered that some receivers at that time interpreted the PRN as 00. This history is in part why the United States Air Force GPS Wing issued an open memorandum over a year ago (September of 2006) to the GPS community. CGSIC distributed the memorandum to all of our membership at the time and the following link is to a copy of the memorandum. http://www.navcen.uscg.gov/gps/geninfo/50SW_GPSW_letter.pdf The issue was also discussed at the last CGSIC meeting at Fort Worth Texas during September of 2007. My thanks to John Owen for correcting my omission of the use of PRN32 in the 1990s. It gives me the opportunity to stress to the CGSIC membership the importance of advising your associates in the GPS community to report any GPS receiver issues with PRN32 when it is placed operational next week. Roughly 15 years has passed since PRN32 was last broadcast and during that time much effort has been made in providing notification to the GPS manufacturers and users that PRN32 may be used in the future. However, there are probably many users who do not subscribe to NAVSTAR Advisory Notice to Users (NANUs) or participate in CGSIC. As stated in the NANUs, civil GPS users should report GPS outages or problems to the Navigation Center (NAVCEN). The preferred way to make a report is by internet using the "GPS report-a-problem" link located on the following NAVCEN website page: http://www.navcen.uscg.gov/gps/default.htm A report can also be made by calling the Navigation Information Service 24 hour phone number (703-313-5900). Best Regards, CGSIC Executive Secretariat (acting) Gene Schlechte, Systems Management Division, USCG Navigation Center -----Original Message----- From: Sent: Wednesday, February 13, 2008 7:17 AM To: Schlechte, Gene Cc: Rob Linham; Glenn Kingsley Subject: Re: CGSIC: PRN32 expected to be set Healthy on 19FEB2008 Dear Gene Not quite true. Way back in the mid 1990's an operational satellite was set to PRN 32. Unfortunately a problem with Rockwell's software resulted in some unusual receiver behavior!!! The PRN number was changed within days of the SV being set operational. But are not some of these receivers still in use? Regards John Owen Date sent: Tue, 5 Feb 2008 18:39:01 -0500 From: "Schlechte, Gene" <[log in to unmask]> To: <[log in to unmask]> Subject: CGSIC: PRN32 expected to be set Healthy on 19FEB2008 [ Double-click this line for list subscription options ] To CGSIC Registered Members email distribution: Below is the GPS User Advisory issued today announcing that SVN23 (PRN32) can be expected to be set usable on 19 FEB 2008. This will be the first time that PRN32 will be used by an operational GPS satellite. Best Regards, CGSIC Executive Secretariat (acting) Gene Schlechte, Systems Management Division, USCG Navigation Center -----Original Message----- Sent: Tuesday, February 05, 2008 9:18 AM To: NANU list server Subject: NANU 2008016 NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008016 NANU TYPE: GENERAL *** GENERAL MESSAGE TO ALL GPS USERS *** THE GPS COMMUNITY GAINED APPROVAL TO SET SVN23 (PRN32) USABLE. BASED ON CURRENT PLANNING, SVN23 (PRN32) WILL BE SET USABLE ON JDAY 050 (19 FEB 2008). AN ADDITIONAL NANU WILL TRANSMIT NLT 4 DAYS PRIOR TO THE PROJECTED USABLE DATE/TIME. IF NECESSARY, ADDITIONAL NANUS WILL NOTIFY USERS OF ANY CHANGES TO THIS PLAN. ANYONE EXPERIENCING PROBLEMS OR HAVING ANY CURRENT CONCERNS WITH PRN32 SHOULD CONTACT THE APPROPRIATE AGENCY LISTED BELOW. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS OPERATIONS CENTER AT HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541, COMM 719-567-2541, [log in to unmask], HTTP://GPS.AFSPC.AF.MIL/GPS MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-9994, COMM 805-606-9994, [log in to unmask] *** GENERAL MESSAGE TO ALL GPS USERS *** POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS OPERATIONS CENTER at HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541, COMM 719-567-2541, [log in to unmask], HTTP://gps.afspc.af.mil/gps MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-9994, COMM 805-606-9994, [log in to unmask] _______________________________________________ CGSIC one-way mailing list [log in to unmask] Unsubscribe: http://cgls.uscg.mil/mailman/listinfo/cgsic This message has been checked for viruses but the contents of an attachment may still contain software viruses, which could damage your computer system: you are advised to perform your own checks. 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