Landsat 4

Landsat 4

Artist's rendering of Landsat 5, which is identical to Landsat 4.
Mission type	Earth imaging
Operator	NASA / NOAA
COSPAR ID	1982-072A
SATCAT no.	13367
Spacecraft properties
Bus	Multimission Modular Spacecraft
Manufacturer	GE Astro Space
Launch mass	1,941 kilograms (4,279 lb)
Dry mass	1,407 kilograms (3,102 lb)
Start of mission
Launch date	July 16, 1982 (1982-07-16)
Rocket	Delta 3920
Launch site	Vandenberg AFB SLC-2W
End of mission
Deactivated	June 15, 2001 (2001-06-16)
Orbital parameters
Reference system	Geocentric
Regime	Sun-synchronous
Perigee altitude	700 kilometers (430 mi)
Apogee altitude	704 kilometers (437 mi)
Inclination	98.2 degrees
Period	98.81 minutes
Repeat interval	16 days
Epoch	August 17, 1982[1]

Landsat 4 is the fourth satellite of the Landsat program. It was launched on July 16, 1982, with the primary goal of providing a global archive of satellite imagery. Although the Landsat Program is managed by NASA, data from Landsat 4 was collected and distributed by the U.S. Geological Survey. Landsat 4 science operations ended on December 14, 1993, when the satellite lost its ability to transmit science data, far beyond its designed life expectancy of five years. The satellite housekeeping telemetry and tracking continued to be maintained by NASA until it was decommissioned on June 15, 2001.