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, and made available by the US Coast Guard.

Satellite Outage File (SOF) Details

The current SOF is available from CelesTrak here: 2020_213_190230_v01.sof
The latest check for a SOF was on: 2020 August 3, 14:26:03
The SOF was last retrieved on: 2020 August 3, 12:03:22

GPS Satellite Outage Calendar

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

     
JulyAugust 2020September
SuMoTuWeThFrSa
1
PRN 18

PRN 23

PRN 14

PRN 23
2
PRN 18

PRN 23

PRN 14

PRN 23
3
PRN 18

PRN 23

PRN 14

PRN 23
4
PRN 18

PRN 23

PRN 14

PRN 23
5
PRN 18

PRN 23

PRN 14

PRN 23
6
PRN 18

PRN 23

PRN 14

PRN 16
B 21:00

PRN 23
7
PRN 18

PRN 23

PRN 14

PRN 16
E 09:00

PRN 23
8
PRN 18

PRN 23

PRN 14

PRN 23
9
PRN 18

PRN 23

PRN 14

PRN 23
10
PRN 18

PRN 23

PRN 14

PRN 23
11
PRN 18

PRN 23

PRN 14

PRN 23
12
PRN 18

PRN 23

PRN 14

PRN 23
13
PRN 18

PRN 23

PRN 14

PRN 23
14
PRN 18

PRN 23

PRN 14

PRN 23
15
PRN 18

PRN 23

PRN 14

PRN 23
16
PRN 18

PRN 23

PRN 14

PRN 23
17
PRN 18

PRN 23

PRN 14

PRN 23
18
PRN 18

PRN 23

PRN 14

PRN 23
19
PRN 18

PRN 23

PRN 14

PRN 23
20
PRN 18

PRN 23

PRN 14

PRN 23
21
PRN 18

PRN 23

PRN 14

PRN 23
22
PRN 18

PRN 23

PRN 14

PRN 23
23
PRN 18

PRN 23

PRN 14

PRN 23
24
PRN 18

PRN 23

PRN 14

PRN 23
25
PRN 18

PRN 23

PRN 14

PRN 23
26
PRN 18

PRN 23

PRN 14

PRN 23
27
PRN 18

PRN 23

PRN 14

PRN 23
28
PRN 18

PRN 23

PRN 14

PRN 23
29
PRN 18

PRN 23

PRN 14

PRN 23
30
PRN 18

PRN 23

PRN 14

PRN 23
31
PRN 18

PRN 23

PRN 14

PRN 23

Current GPS Outages

Current Outages
PRNSVNOutage TypeReferenceOutage Start Time
2376UNUSUFN20200336/30/2020 8:10:00 PM

Predicted GPS Outages

Predicted Outages
PRNSVNOutage TypeReferenceOutage Start TimeOutage End TimeDuration (hrs)
1834FCSTUUFN201915610/7/2019 8:00:00 PM  
2360FCSTUUFN20200103/9/2020 3:30:00 PM  
1441FCSTUUFN20200317/9/2020 6:00:00 PM  
1656FCSTDV20200378/6/2020 9:00:00 PM8/7/2020 9:00:00 AM12

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: 4
Current number of healthy GPS satellites: 27
Unused PRN number(s): 14

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.