American Earth-observing satellite launched in 1982 as part of the Landsat program
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.
^McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved June 16, 2013.
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