Success
Navstar 4
Navigation
United States Air Force(USAF)Government
Atlas F/SVS
MEOorbit
First generation GPS satellite
Monday, December 11, 1978 at 3:59 AM
Mission details
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites.
Feb 22, 1978 — ongoing
Orbital Attempt
#2,161
USAF Mission
#734
Pad Launch
#20
Location Launch
#469
Designator
1978-112
Launch Window
NET
Dec 11, 1978, 3:59 AM
Schedule Changes
1 update
Space Launch Complex 3E
SLC-3E is a launch pad at Vandenberg Space Force Base. It was originally built for the MIDAS program and later used for various other missions. After a period of inactivity, it was refurbished in the early 2000s to launch Atlas V rockets. The pad is now being upgraded to accommodate the new Vulcan Centaur rocket. The last Atlas V launch from SLC-3E happened in November 2022, with the first Vulcan launch expected in 2025.
Total Launches
48
Orbital Attempts
45
Fastest Turnaround
1mo 2d
Atlas F/SVS Specs
The Atlas E/F (or SB-1A) was an American expendable launch system and sounding rocket built using parts of decommissioned SM-65 Atlas missiles. It was a member of the Atlas family of rockets.
Reusable
No
Maiden Flight
1977
Fastest Turnaround
2mo 5d
Total Launches
7
Successful
7
Failed
0
Consecutive Success
7
Maiden flight: Jun 23, 1977
United States Air Force
The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established as a separate branch of the United States Armed Forces in 1947 with the enactment of the National Security Act of 1947.
Founded
1947
Administrator
Commander-in-Chief: President of the US
Total Launches
1,078
Successful
972
Failed
106
Pending
0
Consecutive Success
68
Vandenberg SFB, CA, USA
Vandenberg Space Force Base is a United States Space Force Base in Santa Barbara County, California. Established in 1941, Vandenberg Space Force Base is a space launch base, launching spacecraft from the Western Range, and also performs missile testing. The United States Space Force's Space Launch Delta 30 serves as the host delta for the base, equivalent to an Air Force air base wing. In addition to its military space launch mission, Vandenberg Space Force Base also hosts space launches for civil and commercial space entities, such as NASA and SpaceX.
Timezone
America/Los_Angeles
Local Launch Time
Dec 10, 1978, 7:59 PM
Total Launches
885
Total Landings
34
Coordinates
34.7513, -120.5202