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GPS Satellite Outage Information

All information on this page is taken from the GPS Satellite Outage File and SEM almanacs produced by the US Air Force 2nd Space Operations Squadron, who operates the GPS Constellation.

Satellite Outage File (SOF) Details

The current SOF is available from CelesTrak here: 2016_267_002729_v01.sof
The latest check for a SOF was on: 2016 September 30, 17:45:34
The SOF was last retrieved on: 2016 September 30, 09:50:29

GPS Satellite Outage Calendar

Historical outages are colored black, Predicted outages are colored gold, Current outages are colored red

     
AugustSeptember 2016October
SuMoTuWeThFrSa
12
PRN 1
B 03:05
E 07:58
3
45678
PRN 20
B 20:41
9
PRN 20
E 02:31
10
1112131415
PRN 14
B 18:44
16
PRN 14
E 01:11
17
1819202122
PRN 21
B 18:41
E 23:55
2324
252627282930

Current GPS Outages

No Current Outages

Predicted GPS Outages

No Predicted Outages

Historical GPS Outages

A GPS historical outage table can be accessed from the link below. The historical outages table contains all GPS outages since 1998.

Historical Outages

GPS Satellite Health Information

The information below shows the number of healthy GPS satellites, since 1998. The number of satellites in the GPS constellation comes from the SEM almanac for that day. The number of unhealthy satellites for that day comes from the Satellite Outage File. The SOF outages are subtracted from the number of satellites in the constellation to get the number of healthy satellites.

The list of unused PRN numbers come from those PRNs not listed in the SEM almanac.

Number of GPS satellites in the latest almanac: 31
Number of unhealthy GPS satellites in the SOF: 0
Current number of healthy GPS satellites: 31
Unused PRN number(s): 4

Healthy GPS Satellites Graph

This graph plots the number of healthy GPS satellites since 1998 (Full History), or over the last 365 days.

Note that since this is calculated on a daily boundary, this graph will show sequential outages in a single day as concurrent, and may not reflect the more updated statistics above.