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- 01-19-2010
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GPS Satellite SVN24 Begins 12-Month Move
January 14, 2010
http://www.gpsworld.com/gnss-system/gps-modernization/news/gps-satellite-svn24-begins-12-month-move-9391?print=1
GPS satellite SVN24 began moving into a new orbital slot today as
scheduled. The U.S. Air Force Global Positioning Systems Wing and the
50th Space Wing on January 11 announced a reconfiguration of GPS
constellation to 24+3 or “Expandable 24.”
Moving three existing GPS satellites to new orbit locations is expected
to have a profound effect on GPS capabilities for all civil, commercial,
and military users worldwide. The plan will significantly alter the
current configuration, which consists of indeed 30 GPS satellites in MEO
or medium earth orbit that are used globally. However, many of the
additional satellites are currently flown in tandem, side by side, with
considerably older satellites and effectively limit the constellation
geometry to that of 24 satellites.
"We started implementation of the Expandable 24 today with a successful
Delta-V of SVN24. The reposition time is 12 months," said Col. David T.
Buckman, U.S. Air Force in a notification e-mail. For more on the
reconfiguration, read Don Jewell's Defense PNT editorial.
> COMM 719-567-2541, gps_support@schriever.af.mil, HTTPS://gps.afspc.af.mil
> MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3514,
> COMM 805-606-3514, JSPOCCOMBATOPS@VANDENBERG.AF.MIL
> UNCLASSIFIED
> GPS OPERATIONAL ADVISORY 013.OA1
> SUBJ: GPS STATUS 13 JAN 2010
> 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
> A. BLOCK I : NONE
> B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
> PLANE : SLOT B6, D1, C2, D4, E6, C6, A4, A3, A1, E3, D2, B4, F3, F1
> CLOCK : RB, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB, RB
> BLOCK II: PRNS 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28
> PLANE : SLOT F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, A5, F5, A6, B3
> CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, CS, RB
> BLOCK II: PRNS 29, 30, 31, 32
> PLANE : SLOT C1, B2, A2, E5
> CLOCK : RB, CS, RB, RB
> 2. CURRENT ADVISORIES AND FORECASTS :
> A. FORECASTS: FOR SEVEN DAYS AFTER EVENT CONCLUDES.
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
START - STOP)
> MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3514,
> COMM 805-606-3514, JSPOCCOMBATOPS@VANDENBERG.AF.MIL
> UNCLASSIFIED
> GPS OPERATIONAL ADVISORY 013.OA1
> SUBJ: GPS STATUS 13 JAN 2010
> 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
> A. BLOCK I : NONE
> B. BLOCK II: PRNS 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
> PLANE : SLOT B6, D1, C2, D4, E6, C6, A4, A3, A1, E3, D2, B4, F3, F1
> CLOCK : RB, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB, RB
> BLOCK II: PRNS 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28
> PLANE : SLOT F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, A5, F5, A6, B3
> CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, CS, RB
> BLOCK II: PRNS 29, 30, 31, 32
> PLANE : SLOT C1, B2, A2, E5
> CLOCK : RB, CS, RB, RB
> 2. CURRENT ADVISORIES AND FORECASTS :
> A. FORECASTS: FOR SEVEN DAYS AFTER EVENT CONCLUDES.
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
> 2010001 071958Z JAN 2010 29 FCSTDV 014/1830-015/0630
> 2010003 082005Z JAN 2010 24 FCSTDV 013/1630-014/1630
> 2010004 140038Z JAN 2010 24 FCSTSUMM 013/1652-014/0036
> B. ADVISORIES:
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
START - STOP)
> 2010003 082005Z JAN 2010 24 FCSTDV 013/1630-014/1630
> 2010004 140038Z JAN 2010 24 FCSTSUMM 013/1652-014/0036
> B. ADVISORIES:
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
> C. GENERAL:
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
START - STOP)
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
> 2009025 061455Z APR 2009 GENERAL /-/
> 2010002 080157Z JAN 2010 GENERAL /-/
> 3. REMARKS:
> A. THE POINT OF CONTACT FOR GPS MILITARY OPERATIONAL SUPPORT IS THE GPS
> OPERATIONS CENTER AT (719)567-2541 OR DSN 560-2541.
> B. CIVILIAN: FOR INFORMATION, CONTACT US COAST GUARD NAVCEN AT
> COMMERCIAL (703)313-5900 24 HOURS DAILY AND INTERNET
> HTTP://WWW.NAVCEN.USCG.GOV
> C. MILITARY SUPPORT WEBPAGES CAN BE FOUND AT THE FOLLOWING
> HTTPS://GPS.AFSPC.AF.MIL/GPS OR HTTP://GPS.AFSPC.AF.MIL/GPSOC
> 2010002 080157Z JAN 2010 GENERAL /-/
> 3. REMARKS:
> A. THE POINT OF CONTACT FOR GPS MILITARY OPERATIONAL SUPPORT IS THE GPS
> OPERATIONS CENTER AT (719)567-2541 OR DSN 560-2541.
> B. CIVILIAN: FOR INFORMATION, CONTACT US COAST GUARD NAVCEN AT
> COMMERCIAL (703)313-5900 24 HOURS DAILY AND INTERNET
> HTTP://WWW.NAVCEN.USCG.GOV
> C. MILITARY SUPPORT WEBPAGES CAN BE FOUND AT THE FOLLOWING
> HTTPS://GPS.AFSPC.AF.MIL/GPS OR HTTP://GPS.AFSPC.AF.MIL/GPSOC
> http://gps.afspc.af.mil/gps/Current/current.nnu
> http://www.navcen.uscg.gov/gps/geninfo/NANUabbr.htm
> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2010004
> SUBJ: SVN24 (PRN24) FORECAST OUTAGE SUMMARY JDAY 013/1652 - JDAY 014/0036
> 1. NANU TYPE: FCSTSUMM
> NANU NUMBER: 2010004
> NANU DTG: 140038Z JAN 2010
> REFERENCE NANU: 2010003
> REF NANU DTG: 082005Z JAN 2010
> SVN: 24
> PRN: 24
> START JDAY: 013
> START TIME ZULU: 1652
> START CALENDAR DATE: 13 JAN 2010
> STOP JDAY: 014
> STOP TIME ZULU: 0036
> STOP CALENDAR DATE: 14 JAN 2010
> 2. CONDITION: GPS SATELLITE SVN24 (PRN24) WAS UNUSABLE ON JDAY 013
> (13 JAN 2010) BEGINNING 1652 ZULU UNTIL JDAY 014 (14 JAN 2010)
> ENDING 0036 ZULU.
> 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
> MILITARY - GPS OPERATIONS CENTER at HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN