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Posted by Sam Wormley on March 20, 2008, 6:15 pm


s_anode@comcast.net wrote:
>> Dan Fletcher wrote:
>>> Sam,
>>> Hence, my confusion, especially in light of this where it was set unusable.
>>> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008030 NANU TYPE: GENERAL
>>> *** GENERAL MESSAGE TO ALL GPS USERS *** GPS SATELLITE SVN32 (PRN01) WAS SET
>>> UNUSABLE ON JDAY 077 (17 MAR 2008) AT 1953Z. SVN32 (PRN01) WAS
>>> DECOMMISSIONED
>>> FROM ACTIVE SERVICE ON JDAY 077 (17 MAR 2008) AT 2200Z. PRN01 WILL BE
>>> AVAILABLE FOR FUTURE SATELLITE SERVICE.
>>> So, not trying to be difficult! Just wondering why, if the bird is unusable,
>>> I'm still using it for positioning. If I'm missing something, just help me
>>> understand it; I'm trying to learn!
>>> Thanks.
>>>> Dan Fletcher wrote:
>>>>> Fired up three different GPS units today when PRN01 was in range, and all
>>>>> three locked onto it and were using is for positioning. Decommissioned? I
>>>>> think not!
>>>>> What is everyone else seeing?
>>>> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008028 NANU TYPE: GENERAL
>>>> *** GENERAL MESSAGE TO ALL GPS USERS ***
>>>> SVN32 (PRN01) FORECAST OUTAGE JDAY 077/1930Z UNTIL FURTHER NOTICE.
>>>> GPS SATELLITE SVN32 (PRN01) WILL BE UNUSABLE NO EARLIER THAN JDAY 077 (17
>>>> MAR 2008) BEGINNING 1930Z UNTIL FURTHER NOTICE.
>>>> *** 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, gps_supp...@schriever.af.mil,
>>>> HTTP://gps.afspc.af.mil/gps
>>>> MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-9994,
>>>> COMM 805-606-9994, JSPOCCOMBAT...@VANDENBERG.AF.MIL
>>>> UNCLASSIFIED
>>>> GPS OPERATIONAL ADVISORY 079.OA1
>>>> SUBJ: GPS STATUS 19 MAR 2008
>>>> 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
>>>> A. BLOCK I : NONE
>>>> B. BLOCK II: PRNS 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
>>>> PLANE : SLOT D1, C2, D4, B5, C1, A4, A3, A1, E3, D2, B4, F3, F1, F2
>>>> CLOCK : RB, CS, RB, RB, RB, RB, CS, CS, RB, RB, RB, RB, RB, RB
>>>> BLOCK II: PRNS 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
>>>> PLANE : SLOT B1, C4, E4, C3, E1, D3, E2, F4, D5, A5, F5, A6, B3, C6
>>>> CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, CS, RB, RB
>>>> BLOCK II: PRNS 30, 31, 32
>>>> PLANE : SLOT B2, A2, E5
>>>> CLOCK : 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)
>>>> 2008025 010001Z MAR 2008 10 FCSTMX 065/1300-066/0100
>>>> 2008026 051812Z MAR 2008 10 FCSTSUMM 065/1517-065/1812
>>>> 2008027 122215Z MAR 2008 25 FCSTMX 077/2200-078/1000
>>>> 2008031 180233Z MAR 2008 25 FCSTSUMM 077/2226-078/0219
>>>> B. ADVISORIES:
>>>> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU
>>>> TIME START - STOP)
>>>> C. GENERAL:
>>>> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU
>>>> TIME START - STOP)
>>>> 2008024 261809Z FEB 2008 GENERAL /-/
>>>> 2008028 131929Z MAR 2008 GENERAL /-/
>>>> 2008029 160248Z MAR 2008 07 LAUNCH /-/
>>>> 2008030 172219Z MAR 2008 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
>>>> HTTP://GPS.AFSPC.AF.MIL/GPS OR HTTP://GPS.AFSPC.AF.MIL/GPSOC
>> Off the top of my head, I don't know more... but will keep my ears
>> open.
>> - Sam- Hide quoted text -
>> - Show quoted text -
>
>
> The following is the first and last ephemeris updates for PRN-1 from
> yesterday 3/19/08 from
> the CORS global navigation files:
> (see http://geodesy.noaa.gov/CORS/download2/ )
>
> 2 NAVIGATION DATA RINEX
> VERSION / TYPE
> CCRINEXN V1.6.0 UX CDDIS 20-MAR-08 02:52 PGM / RUN
> BY / DATE
> IGS BROADCAST EPHEMERIS FILE
> COMMENT
> 0.1118E-07 0.7451E-08 -0.5960E-07 -0.5960E-07 ION
> ALPHA
> 0.9011E+05 0.0000E+00 -0.1966E+06 -0.6554E+05 ION
> BETA
> -0.465661287308E-08-0.106581410364E-13 405504 1471 DELTA-UTC:
> A0,A1,T,W
> 14 LEAP
> SECONDS
> END OF
> HEADER
> 1 08 3 19 0 0 0.0 0.193218700588E-03 0.261479726760E-11
> 0.000000000000E+00
> 0.136000000000E+03 0.893437500000E+02
> 0.371658338204E-08-0.308460744326E+01
> 0.471994280815E-05 0.701391987968E-02 0.111348927021E-04
> 0.515361769486E+04
> 0.259200000000E+06 0.189989805222E-06-0.304143918845E
> +01-0.894069671631E-07
> 0.991567696923E+00 0.177468750000E+03-0.178219041623E
> +01-0.756245786387E-08
> 0.205008539429E-09 0.100000000000E+01 0.147100000000E+04
> 0.000000000000E+00
> 0.570000000000E+01 0.630000000000E+02-0.372529029846E-08
> 0.136000000000E+03
> 0.252018000000E+06 0.400000000000E+01 0.000000000000E+00
> 0.000000000000E+00
>
> 1 08 3 19 22 0 0.0 0.193433836102E-03 0.261479726760E-11
> 0.000000000000E+00
> 0.770000000000E+02 0.486250000000E+02 0.363872299599E-08
> 0.218482882961E+01
> 0.244751572609E-05 0.701174722053E-02 0.120941549540E-04
> 0.515361517716E+04
> 0.338400000000E+06 0.540167093277E-07-0.304203948664E
> +01-0.137835741043E-06
> 0.991584723827E+00 0.159250000000E+03-0.178251724383E
> +01-0.743566686823E-08
> 0.628597612185E-10 0.100000000000E+01 0.147100000000E+04
> 0.000000000000E+00
> 0.400000000000E+01 0.630000000000E+02-0.372529029846E-08
> 0.770000000000E+02
> 0.333198000000E+06 0.400000000000E+01 0.000000000000E+00
> 0.000000000000E+00
>
> The fact that there is data means PRN-1 was broadcasting, the "63" in
> the 2nd col, 2nd to last
> row is the health indication of Unhealthy. Your receiver might track
> but it should not use it.
>
>
>

Thanks!

Posted by Jon on March 21, 2008, 10:46 am


On Mar 20, 5:55 pm, s_an...@comcast.net wrote:
> > Dan Fletcher wrote:
> > > Sam,
> > > Hence, my confusion, especially in light of this where it was set unusable.
> > > NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008030 NANU TYPE: GENERAL
> > > *** GENERAL MESSAGE TO ALL GPS USERS *** GPS SATELLITE SVN32 (PRN01) WAS
SET
> > > UNUSABLE ON JDAY 077 (17 MAR 2008) AT 1953Z. SVN32 (PRN01) WAS
> > > DECOMMISSIONED
> > > FROM ACTIVE SERVICE ON JDAY 077 (17 MAR 2008) AT 2200Z. PRN01 WILL BE
> > > AVAILABLE FOR FUTURE SATELLITE SERVICE.
> > > So, not trying to be difficult! Just wondering why, if the bird is
unusable,
> > > I'm still using it for positioning. If I'm missing something, just help me
> > > understand it; I'm trying to learn!
> > > Thanks.
> > >> Dan Fletcher wrote:
> > >>> Fired up three different GPS units today when PRN01 was in range, and all
> > >>> three locked onto it and were using is for positioning. Decommissioned? I
> > >>> think not!
> > >>> What is everyone else seeing?
> > >> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008028 NANU TYPE: GENERAL
> > >> *** GENERAL MESSAGE TO ALL GPS USERS ***
> > >> SVN32 (PRN01) FORECAST OUTAGE JDAY 077/1930Z UNTIL FURTHER NOTICE.
> > >> GPS SATELLITE SVN32 (PRN01) WILL BE UNUSABLE NO EARLIER THAN JDAY 077 (17
> > >> MAR 2008) BEGINNING 1930Z UNTIL FURTHER NOTICE.
> > >> *** 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, gps_supp...@schriever.af.mil,
> > >> HTTP://gps.afspc.af.mil/gps
> > >> MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-9994,
> > >> COMM 805-606-9994, JSPOCCOMBAT...@VANDENBERG.AF.MIL
> > >> UNCLASSIFIED
> > >> GPS OPERATIONAL ADVISORY 079.OA1
> > >> SUBJ: GPS STATUS 19 MAR 2008
> > >> 1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
> > >> A. BLOCK I : NONE
> > >> B. BLOCK II: PRNS 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
> > >> PLANE : SLOT D1, C2, D4, B5, C1, A4, A3, A1, E3, D2, B4, F3, F1, F2
> > >> CLOCK : RB, CS, RB, RB, RB, RB, CS, CS, RB, RB, RB, RB, RB, RB
> > >> BLOCK II: PRNS 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
> > >> PLANE : SLOT B1, C4, E4, C3, E1, D3, E2, F4, D5, A5, F5, A6, B3, C6
> > >> CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, CS, RB, RB
> > >> BLOCK II: PRNS 30, 31, 32
> > >> PLANE : SLOT B2, A2, E5
> > >> CLOCK : 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)
> > >> 2008025 010001Z MAR 2008 10 FCSTMX 065/1300-066/0100
> > >> 2008026 051812Z MAR 2008 10 FCSTSUMM 065/1517-065/1812
> > >> 2008027 122215Z MAR 2008 25 FCSTMX 077/2200-078/1000
> > >> 2008031 180233Z MAR 2008 25 FCSTSUMM 077/2226-078/0219
> > >> B. ADVISORIES:
> > >> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU
> > >> TIME START - STOP)
> > >> C. GENERAL:
> > >> NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU
> > >> TIME START - STOP)
> > >> 2008024 261809Z FEB 2008 GENERAL /-/
> > >> 2008028 131929Z MAR 2008 GENERAL /-/
> > >> 2008029 160248Z MAR 2008 07 LAUNCH /-/
> > >> 2008030 172219Z MAR 2008 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
> > >> HTTP://GPS.AFSPC.AF.MIL/GPS OR HTTP://GPS.AFSPC.AF.MIL/GPSOC
> > Off the top of my head, I don't know more... but will keep my ears
> > open.
> > - Sam- Hide quoted text -
> > - Show quoted text -
> The following is the first and last ephemeris updates for PRN-1 from
> yesterday 3/19/08 from
> the CORS global navigation files:
> (seehttp://geodesy.noaa.gov/CORS/download2/ )
> 2 NAVIGATION DATA RINEX
> VERSION / TYPE
> CCRINEXN V1.6.0 UX CDDIS 20-MAR-08 02:52 PGM / RUN
> BY / DATE
> IGS BROADCAST EPHEMERIS FILE
> COMMENT
> 0.1118E-07 0.7451E-08 -0.5960E-07 -0.5960E-07 ION
> ALPHA
> 0.9011E+05 0.0000E+00 -0.1966E+06 -0.6554E+05 ION
> BETA
> -0.465661287308E-08-0.106581410364E-13 405504 1471 DELTA-UTC:
> A0,A1,T,W
> 14 LEAP
> SECONDS
> END OF
> HEADER
> 1 08 3 19 0 0 0.0 0.193218700588E-03 0.261479726760E-11
> 0.000000000000E+00
> 0.136000000000E+03 0.893437500000E+02
> 0.371658338204E-08-0.308460744326E+01
> 0.471994280815E-05 0.701391987968E-02 0.111348927021E-04
> 0.515361769486E+04
> 0.259200000000E+06 0.189989805222E-06-0.304143918845E
> +01-0.894069671631E-07
> 0.991567696923E+00 0.177468750000E+03-0.178219041623E
> +01-0.756245786387E-08
> 0.205008539429E-09 0.100000000000E+01 0.147100000000E+04
> 0.000000000000E+00
> 0.570000000000E+01 0.630000000000E+02-0.372529029846E-08
> 0.136000000000E+03
> 0.252018000000E+06 0.400000000000E+01 0.000000000000E+00
> 0.000000000000E+00
> 1 08 3 19 22 0 0.0 0.193433836102E-03 0.261479726760E-11
> 0.000000000000E+00
> 0.770000000000E+02 0.486250000000E+02 0.363872299599E-08
> 0.218482882961E+01
> 0.244751572609E-05 0.701174722053E-02 0.120941549540E-04
> 0.515361517716E+04
> 0.338400000000E+06 0.540167093277E-07-0.304203948664E
> +01-0.137835741043E-06
> 0.991584723827E+00 0.159250000000E+03-0.178251724383E
> +01-0.743566686823E-08
> 0.628597612185E-10 0.100000000000E+01 0.147100000000E+04
> 0.000000000000E+00
> 0.400000000000E+01 0.630000000000E+02-0.372529029846E-08
> 0.770000000000E+02
> 0.333198000000E+06 0.400000000000E+01 0.000000000000E+00
> 0.000000000000E+00
> The fact that there is data means PRN-1 was broadcasting, the "63" in
> the 2nd col, 2nd to last
> row is the health indication of Unhealthy. Your receiver might track
> but it should not use it.

Hi Tom,

As of today, it's no longer showing up in the Yuma and SEM format
almanacs.

The Trimble receivers we have (SV6, SV8) both indicate "63" for PRN
1's health and are being excluded.

2SOPS will typically set the bird unhealthy *before* issuing the NANU.
In the case of a bird returning to service, the reverse is also true
(set healthy prior to canceling the NANU).

Decommissioning is a special case, hence the "GENERAL" Nanu Type.


Regards,
Jon

Posted by Sam Wormley on March 21, 2008, 10:59 am


Dan Fletcher wrote:
> Fired up three different GPS units today when PRN01 was in range, and all
> three locked onto it and were using is for positioning. Decommissioned? I
> think not!
>
> What is everyone else seeing?
>
>


2008030------------------------
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2008030 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
GPS SATELLITE SVN32 (PRN01) WAS SET UNUSABLE ON JDAY 077 (17 MAR 2008) AT 1953Z.
SVN32 (PRN01) WAS DECOMMISSIONED FROM
ACTIVE SERVICE ON JDAY 077 (17 MAR 2008) AT 2200Z. PRN01 WILL BE AVAILABLE FOR
FUTURE SATELLITE SERVICE.
*** 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, gps_support@schriever.af.mil,
HTTP://gps.afspc.af.mil/gps
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-9994,
COMM 805-606-9994, JSPOCCOMBATOPS@VANDENBERG.AF.MIL

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