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: 2014_100_235605_v01.sof
The latest check for a SOF was on: 2014 April 16, 13:18:52
The SOF was last retrieved on: 2014 April 16, 04:54:23

GPS Satellite Outage Calendar

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

     
MarchApril 2014May
SuMoTuWeThFrSa
1
PRN 32
B 08:27
E 13:48

PRN 30
2
PRN 30
3
PRN 30
4
PRN 30
5
PRN 30
6
PRN 30
7
PRN 30
8
PRN 30
9
PRN 30
10
PRN 20
B 17:41
E 23:33

PRN 30
11
PRN 30
12
PRN 30
13
PRN 30
14
PRN 30
15
PRN 31
B 14:30

PRN 30
16
PRN 31
E 02:30

PRN 30
17
PRN 30
18
PRN 30
19
PRN 30
20
PRN 30
21
PRN 30
22
PRN 30
23
PRN 30
24
PRN 30
25
PRN 30
26
PRN 30
27
PRN 30
28
PRN 30
29
PRN 30
30
PRN 30

Current GPS Outages

Current Outages
PRNSVNOutage TypeReferenceOutage Start Time
3064UNUSUFN20140182/21/2014 1:59:00 AM

Predicted GPS Outages

Predicted Outages
PRNSVNOutage TypeReferenceOutage Start TimeOutage End TimeDuration (hrs)
3152FCSTDV20140354/15/2014 2:30:00 PM4/16/2014 2:30:00 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: 1
Current number of healthy GPS satellites: 30
Unused PRN number(s): 6

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.