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http://www.navcen.uscg.gov/gps/geninfo/NANUabbr.htm
http://celestrak.com/GPS/NANU/2011/
http://celestrak.com/GPS/status/2011/
http://celestrak.com/GPS/NANU/2011/
http://celestrak.com/GPS/status/2011/
> *** GENERAL MESSAGE TO ALL GPS USERS ***
> POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
> MILITARY - GPS OPERATIONS CENTER at HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN
560-2541,
> POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
> MILITARY - GPS OPERATIONS CENTER at HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN
> 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
> GPS OPERATIONAL ADVISORY 201.OA1
> SUBJ: GPS STATUS 20 JUL 2011
> 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
> A. BLOCK I : NONE
> B. BLOCK II: PRNS 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
> PLANE : SLOT B6, D6, D1, C2, D4, E6, C6, A4, A3, A1, E6, D2, B4, F3
> CLOCK : RB, CS, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB
> BLOCK II: PRNS 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27
> PLANE : SLOT F1, F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, B2, F5, A6
> CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, CS
> BLOCK II: PRNS 28, 29, 30, 31, 32
> PLANE : SLOT B3, C1, B5, A2, E5
> CLOCK : RB, 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
> GPS OPERATIONAL ADVISORY 201.OA1
> SUBJ: GPS STATUS 20 JUL 2011
> 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
> A. BLOCK I : NONE
> B. BLOCK II: PRNS 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
> PLANE : SLOT B6, D6, D1, C2, D4, E6, C6, A4, A3, A1, E6, D2, B4, F3
> CLOCK : RB, CS, RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB
> BLOCK II: PRNS 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27
> PLANE : SLOT F1, F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, B2, F5, A6
> CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, CS
> BLOCK II: PRNS 28, 29, 30, 31, 32
> PLANE : SLOT B3, C1, B5, A2, E5
> CLOCK : RB, 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
> B. ADVISORIES:
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
START - STOP)
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
> 2011042 132058Z May 2011 30 UNUSUFN 133/2055-/
> C. GENERAL:
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
START - STOP)
> C. GENERAL:
> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME
> 2011045 222019Z Jun 2011 GENERAL /-/
> 2011046 122307Z Jul 2011 GENERAL /-/
> 2011047 160718Z Jul 2011 01 LAUNCH /-/
> 2011048 210140Z Jul 2011 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 719-567-2541 24 HOURS DAILY AND INTERNET
> HTTPS://WWW.NAVCEN.USCG.GOV
> C. MILITARY SUPPORT WEBPAGES CAN BE FOUND AT THE FOLLOWING
> HTTPS://gps.afspc.af.mil/GPS OR HTTPS://gps.afspc.af.mil/GPSOC
> 2011046 122307Z Jul 2011 GENERAL /-/
> 2011047 160718Z Jul 2011 01 LAUNCH /-/
> 2011048 210140Z Jul 2011 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 719-567-2541 24 HOURS DAILY AND INTERNET
> HTTPS://WWW.NAVCEN.USCG.GOV
> C. MILITARY SUPPORT WEBPAGES CAN BE FOUND AT THE FOLLOWING
> HTTPS://gps.afspc.af.mil/GPS OR HTTPS://gps.afspc.af.mil/GPSOC
PS/NANU/2011/http://celestrak.com/GPS/status/2011/
ICE.
This marks the retirement of the last IIA bird on the most demanding
orbital plane, the B plane.
It's the most demanding due to thermal and power cycles caused by
solar eclipses (that was the explanation for IIF-1 not performing much
better than IIR-M birds, correct me if appropriate).
There are healthy IIA birds operational on all other orbits A-3, C-2,
D-2, E-2, F-1, not counting the residuals.
The next oldest bird on the B plane is IIR-5 (SVN44), that completed
11 years since launch last week. Hence it's close to 4 years past its
expected (let's call it minimum) service life. In 5 months the oldest
operational bird IIA-10 (SVN23) will complete 21 years, to this date
it's ephemeris and clock performance is excellent considering it's
almost years too old :-)
Take that GAO and your pessimistic views... GAO, the "problem" with
the GPS constellation isn't that satellites will die out of a
sudden... It's that they are living a long geriatric life (both great
and bad), which will slow L2C and L5 signals becoming operational by
10+ years each. Certainly not the alarmist chaos scenario that you've
been making a big deal out of.
But that certainly is causing the GPS constellation to perform way
better than specs. If GPS birds were dying within a few years of their
projected service life, we might be stuck with 24 or so operational
satellites, instead of the current 30/31 operational, without 32
operational just because of control segment limitations...
Marcelo Pacheco
> > NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2011048 NANU TYPE: GENERAL
> > *** GENERAL MESSAGE TO ALL GPS USERS ***
> > GPS SATELLITE SVN30 (PRN30) WAS DECOMMISSIONED FROM ACTIVE SERVICE ON J=
DAY 201 (20 JUL 2011). =A0PRN30 WILL BE AVAILABLE FOR FUTURE SATELLITE SERV=
> > *** GENERAL MESSAGE TO ALL GPS USERS ***
> > GPS SATELLITE SVN30 (PRN30) WAS DECOMMISSIONED FROM ACTIVE SERVICE ON J=
ICE.
> > *** GENERAL MESSAGE TO ALL GPS USERS ***
> > =A0 =A0POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.=
GOV
> > =A0 =A0POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.=
> > =A0 =A0MILITARY - GPS OPERATIONS CENTER at HTTP://GPS.AFSPC.AF.MIL/GPSO=
C, DSN 560-2541,
> > =A0 =A0COMM 719-567-2541, gps_supp...@schriever.af.mil, HTTPS://gps.afs=
pc.af.mil
> > =A0 =A0MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN =A0 =A02=
76-3514,
> > =A0 =A0COMM 805-606-3514, JSPOCCOMBAT...@VANDENBERG.AF.MIL
> > GPS OPERATIONAL ADVISORY =A0 =A0 =A0 =A0201.OA1
> > SUBJ: GPS STATUS 20 JUL 2011
> > 1. SATELLITES, PLANES, AND CLOCKS (CS=3DCESIUM RB=3DRUBIDIUM):
> > A. BLOCK I : NONE
> > B. BLOCK II: PRNS =A01, =A01, =A02, =A03, =A04, =A05, =A06, =A07, =A08,=
=A09, 10, 11, 12, 13
> > GPS OPERATIONAL ADVISORY =A0 =A0 =A0 =A0201.OA1
> > SUBJ: GPS STATUS 20 JUL 2011
> > 1. SATELLITES, PLANES, AND CLOCKS (CS=3DCESIUM RB=3DRUBIDIUM):
> > A. BLOCK I : NONE
> > B. BLOCK II: PRNS =A01, =A01, =A02, =A03, =A04, =A05, =A06, =A07, =A08,=
> > =A0 =A0PLANE =A0 : SLOT B6, D6, D1, C2, D4, E6, C6, A4, A3, A1, E6, D2,=
B4, F3
> > =A0 =A0CLOCK =A0 : =A0 =A0 =A0RB, CS, RB, CS, RB, RB, RB, RB, CS, CS, C=
S, RB, RB, RB
> > =A0 =A0BLOCK II: PRNS 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 2=
6, 27
> > =A0 =A0PLANE =A0 : SLOT F1, F2, B1, C4, E4, C3, E1, D3, E2, F4, D5, B2,=
F5, A6
> > =A0 =A0CLOCK =A0 : =A0 =A0 =A0RB, RB, RB, RB, RB, RB, RB, RB, RB, RB, C=
S, RB, RB, CS
> > =A0 =A0BLOCK II: PRNS 28, 29, 30, 31, 32
> > =A0 =A0PLANE =A0 : SLOT B3, C1, B5, A2, E5
> > =A0 =A0CLOCK =A0 : =A0 =A0 =A0RB, RB, CS, RB, RB
> > 2. CURRENT ADVISORIES AND FORECASTS :
> > A. FORECASTS: =A0 =A0 =A0 =A0 =A0 FOR SEVEN DAYS AFTER EVENT CONCLUDES.
> > NANU =A0 =A0 =A0 =A0 =A0MSG DATE/TIME =A0 =A0 =A0 PRN =A0TYPE =A0 =A0 =
=A0 =A0 SUMMARY (JDAY/ZULU TIME START - STOP)
> > =A0 =A0PLANE =A0 : SLOT B3, C1, B5, A2, E5
> > =A0 =A0CLOCK =A0 : =A0 =A0 =A0RB, RB, CS, RB, RB
> > 2. CURRENT ADVISORIES AND FORECASTS :
> > A. FORECASTS: =A0 =A0 =A0 =A0 =A0 FOR SEVEN DAYS AFTER EVENT CONCLUDES.
> > NANU =A0 =A0 =A0 =A0 =A0MSG DATE/TIME =A0 =A0 =A0 PRN =A0TYPE =A0 =A0 =
> > B. ADVISORIES:
> > NANU =A0 =A0 =A0 =A0 =A0MSG DATE/TIME =A0 =A0 =A0 PRN =A0TYPE =A0 =A0 =
=A0 =A0 SUMMARY (JDAY/ZULU TIME START - STOP)
> > NANU =A0 =A0 =A0 =A0 =A0MSG DATE/TIME =A0 =A0 =A0 PRN =A0TYPE =A0 =A0 =
> > 2011042 =A0 =A0 =A0 132058Z May 2011 =A0 =A030 =A0 UNUSUFN =A0 =A0 =A01=
33/2055-/
> > C. GENERAL:
> > NANU =A0 =A0 =A0 =A0 =A0MSG DATE/TIME =A0 =A0 =A0 PRN =A0TYPE =A0 =A0 =
=A0 =A0 SUMMARY (JDAY/ZULU TIME START - STOP)
> > NANU =A0 =A0 =A0 =A0 =A0MSG DATE/TIME =A0 =A0 =A0 PRN =A0TYPE =A0 =A0 =
> > 2011045 =A0 =A0 =A0 222019Z Jun 2011 =A0 =A0 =A0 =A0 GENERAL =A0 =A0 =
=A0/-/
> > 2011046 =A0 =A0 =A0 122307Z Jul 2011 =A0 =A0 =A0 =A0 GENERAL =A0 =A0 =
=A0/-/
> > 2011047 =A0 =A0 =A0 160718Z Jul 2011 =A0 =A001 =A0 LAUNCH =A0 =A0 =A0 /=
-/
> > 2011048 =A0 =A0 =A0 210140Z Jul 2011 =A0 =A0 =A0 =A0 GENERAL =A0 =A0 =
=A0/-/
> > 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: =A0FOR INFORMATION, CONTACT US COAST GUARD NAVCEN AT
> > COMMERCIAL 719-567-2541 24 HOURS DAILY AND INTERNET
> > HTTPS://WWW.NAVCEN.USCG.GOV
> > C. MILITARY SUPPORT WEBPAGES CAN BE FOUND AT THE FOLLOWING
> > HTTPS://gps.afspc.af.mil/GPS OR HTTPS://gps.afspc.af.mil/GPSOC
> > 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: =A0FOR INFORMATION, CONTACT US COAST GUARD NAVCEN AT
> > COMMERCIAL 719-567-2541 24 HOURS DAILY AND INTERNET
> > HTTPS://WWW.NAVCEN.USCG.GOV
> > C. MILITARY SUPPORT WEBPAGES CAN BE FOUND AT THE FOLLOWING
> > HTTPS://gps.afspc.af.mil/GPS OR HTTPS://gps.afspc.af.mil/GPSOC
This marks the retirement of the last IIA bird on the most demanding
orbital plane, the B plane.
It's the most demanding due to thermal and power cycles caused by
solar eclipses (that was the explanation for IIF-1 not performing much
better than IIR-M birds, correct me if appropriate).
There are healthy IIA birds operational on all other orbits A-3, C-2,
D-2, E-2, F-1, not counting the residuals.
The next oldest bird on the B plane is IIR-5 (SVN44), that completed
11 years since launch last week. Hence it's close to 4 years past its
expected (let's call it minimum) service life. In 5 months the oldest
operational bird IIA-10 (SVN23) will complete 21 years, to this date
it's ephemeris and clock performance is excellent considering it's
almost years too old :-)
Take that GAO and your pessimistic views... GAO, the "problem" with
the GPS constellation isn't that satellites will die out of a
sudden... It's that they are living a long geriatric life (both great
and bad), which will slow L2C and L5 signals becoming operational by
10+ years each. Certainly not the alarmist chaos scenario that you've
been making a big deal out of.
But that certainly is causing the GPS constellation to perform way
better than specs. If GPS birds were dying within a few years of their
projected service life, we might be stuck with 24 or so operational
satellites, instead of the current 30/31 operational, without 32
operational just because of control segment limitations...
Marcelo Pacheco
> *** GENERAL MESSAGE TO ALL GPS USERS ***
> GPS SATELLITE SVN30 (PRN30) WAS DECOMMISSIONED FROM ACTIVE SERVICE ON JDAY 201