How do you get GPS status and health information?

http://www.navcen.uscg.gov/?Do=constellationStatus&apos ;">The Coast Guard has a page.

http://www.navcen.uscg.gov/?pageName=listServerForm
https://gps.afspc.af.mil/GPS/

I am willing to bet Paul in PA knows. Years ago some GPS systems would show on the data collector which satellites were "sick".

Coast Guard Site

http://www.navcen.uscg.gov/

Check on the GPS Constellation Status while you are there and sign up for GPS notifications and NANUs.

Following is the email you will get daily, it shows 31 active satellites, and a list of recent/active NANUs.

You will get NANUs on a when issued basis.

GPS OPERATIONAL ADVISORY 319
SUBJ: GPS STATUS 15 NOV 2015
1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : NONE
B. BLOCK II: PRNS 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
PLANE : SLOT D2, D1, E1, E3, D4, A4, C5, F3, E6, D5, B4, F6, F1, F2
CLOCK : RB, RB, RB, RB, RB, RB, CS, RB, 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, B6, D3, E2, F4, A1, B2, B5, C2, B3, C1
CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, RB, RB, RB
BLOCK II: PRNS 30, 31, 32
PLANE : SLOT A3, A2, E5
CLOCK : RB, 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)
2015089 282019Z OCT 2015 04 FCSTUUFN 306/2100-/
B. ADVISORIES:
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)
2015085 191853Z OCT 2015 23 UNUSUFN 292/1800-/
2015086 201437Z OCT 2015 23 UNUSABLE 292/1800-293/1456
2015087 281930Z OCT 2015 04 UNUSUFN 306/2100-/
2015091 032216Z NOV 2015 04 DECOM 306/2222-307/2209
C. GENERAL:
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)
2014038 241350Z APR 2014 GENERAL /-/
2014039 271351Z APR 2014 GENERAL /-/
2015080 081931Z SEP 2015 GENERAL /-/
2015088 282014Z OCT 2015 GENERAL /-/
2015090 311640Z OCT 2015 10 LAUNCH /-/
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 HTTPS://GPS.AFSPC.AF.MIL/GPSOC
http://www.navcen.uscg.gov/?pageName=listserverunsubscribe&srvr=GPSStat

The next thing to do regularly is to have an active receiver and download the daily ephemeris. GPS planning software usually defaults to the newest ephemeris in your computer. The ephemeris will tell where healthy and unhealthy satellites are in the space constellation, yesterday, today and tomorrow. My planner allows me to include an unhealthy satellite in my planning. The NANUs usually tell you when the outage is expected to be over.

Paul in PA

Wendell,

A s̩ance might work also.

Paul in PA

That is a good source and I also get NotAM's from the FAA https://pilotweb.nas.faa.gov/PilotWeb/displaySelectedNotamsAction.do&apos ;"> FAA NotAM to when they military is going to jam the GPS signals. Like today they are jamming over by death valley and doesn't quite reach here but I've been in area that was jammed. Also shows which SATs are down.

Selected NOTAMs
The following NOTAM list was selected by the user from a previous request. This list may not reflect all active NOTAMs for any of the below locations.
Data Current as of: Wed, 18 Nov 2015 14:25:00 UTC
GPS GLOBAL POSITIONING SYSTEM !GPS 10/112 (KNMH A0023/15) GPS NAV PRN 04 OUT OF SERVICE 1511022100-1601312359
ZAB ALBUQUERQUE (ARTCC),NM. !GPS 11/027 (KZAB A0055/15) ZAB NAV (CHLK GPS 15-15) GPS (INCLUDING WAAS, GBAS, AND ADSB)MAY NOT BE AVAILABLE WITHIN A 476NM RADIUS CENTERED AT 360822N1173846W (BTY214059) FL400-UNL DECREASING IN AREA WITH A DECREASE IN ALTITUDE DEFINED AS: 432NM RADIUS AT FL250, 375NM RADIUS AT 10000FT, 340NM RADIUS AT 4000FT AGL, 253NM RADIUS AT 50FT AGL. DLY 2130-2230 1511172130-1511182230

Number of NOTAMs selected: 2 End of Report

Wendell,

Is that what you re looking for or need we dig deeper?

Paul in PA

I think that's it. I searched for myself to see what was out there and thought maybe I was missing something, so I asked here. I figured someone had a really slick website somewhere that had all kinds of data on satellites, health, etc. Thanks!

So I just got my first email from the NavCen mailing list. When I was still practicing surveying on a daily basis, I never got into this stuff. I was mostly handed the GPS data after being processed by someone that knew how to do it. I focused on the more traditional surveying methods.

That said, I don't really know what I'm looking at. I'm hoping some of you fine folks can provide some guidance. I don't need to know what everything means, so maybe it's best that I explain why I need to know.... I'm trying to build a web application that will grab this information as it becomes available and display it on a page in an organized way. Something that you folks might be interested in viewing from time to time. So I don't really need to know all the ins and outs of the data, just how to display it properly.

Maybe it's a dumb question and I just need to display it exactly as the email shows it, but pretty it up a bit. 🙂

Any help is greatly appreciated.

GPS OPERATIONAL ADVISORY		325
SUBJ: GPS STATUS	  21 NOV 2015
 
1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : NONE
B. BLOCK II: PRNS  1,  2,  3,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15
   PLANE   : SLOT D2, D1, E1, E3, D4, A4, C5, F3, E6, D5, B4, F6, F1, F2
   CLOCK   :	  RB, RB, RB, RB, RB, RB, CS, RB, 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, B6, D3, E2, F4, A1, B2, B5, C2, B3, C1
   CLOCK   :	  RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, RB, RB, RB
   BLOCK II: PRNS 30, 31, 32
   PLANE   : SLOT A3, A2, E5
   CLOCK   :	  RB, 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)
 
2015089	   282019Z OCT 2015	04   FCSTUUFN	 306/2100-/
 
B. ADVISORIES:
NANU		  MSG DATE/TIME	   PRN  TYPE		 SUMMARY (JDAY/ZULU TIME START - STOP)
 
2015085	   191853Z OCT 2015	23   UNUSUFN	  292/1800-/
2015086	   201437Z OCT 2015	23   UNUSABLE	 292/1800-293/1456
2015087	   281930Z OCT 2015	04   UNUSUFN	  306/2100-/
2015091	   032216Z NOV 2015	04   DECOM		306/2222-307/2209
 
C. GENERAL:
NANU		  MSG DATE/TIME	   PRN  TYPE		 SUMMARY (JDAY/ZULU TIME START - STOP)
 
2014038	   241350Z APR 2014		 GENERAL	  /-/
2014039	   271351Z APR 2014		 GENERAL	  /-/
2015080	   081931Z SEP 2015		 GENERAL	  /-/
2015088	   282014Z OCT 2015		 GENERAL	  /-/
2015090	   311640Z OCT 2015	10   LAUNCH	   /-/

The space weather report might be a good addition to that app.
http://www.swpc.noaa.gov/products/satellite-environment

Wendell,

Per your posting:

1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : NONE -
No longer relevant. I like to see all PRNs in a row. In 2017 we will see BLOCK III, more confusing.

B. BLOCK II: PRNS 1, 2, 3, *, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
PLANE : SLOT D2, D1, E1, **, E3, D4, A4, C5, F3, E6, D5, B4, F6, F1, F2
CLOCK : RB, RB, RB, RB,***,RB, RB, CS, RB, RB, RB, RB, RB, RB, RB

* - PRN 4, is not in active constellation, see NANUs in 2, B, below.
** - Plane and Slot are sometimes useful information.
*** - The type of clock in use does not affect our use of GPS.

2. CURRENT ADVISORIES AND FORECASTS :

A. FORECASTS: FOR SEVEN DAYS AFTER EVENT CONCLUDES.
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START

FCSTUUFN, or Forecast Unusable Until Further Notice - Scheduled outage of indefinite duration not necessarily related to Delta-V or maintenance activities.

B. ADVISORIES:
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START -
NANU # 2015087 = 87th notice of 2015

2015087 281930Z OCT 2015 04 UNUSUFN 306/2100-/
UNUSUFN = UNUSeable Until Further Notice, See next NANU

2015091 032216Z NOV 2015 04 DECOM 306/2222-307/2209
DECOM = DECOMissioned, this was the futher notice.

Go to the following sites for Tutorials:

http://www.navcen.uscg.gov/?pageName=gpsStatusExplained

http://www.navcen.uscg.gov/?pageName=nanuAbbreviations

Have a good day.

Paul in PA