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Landsat 2

NSSDCA/COSPAR ID: 1975-004A

Description

LANDSAT 2 was the second of a series of modified Nimbus satellites. The near-polar orbiting spacecraft served as a stabilized, earth-oriented platform for obtaining information on agricultural and forestry resources, geology and mineral resources, hydrology and water resources, geography, cartography, environmental pollution, oceanography and marine resources, and meteorological phenomena. To accomplish these objectives, the spacecraft was equipped with a three-camera return beam vidicon (RBV) and a four-channel multispectral scanner (MSS) to obtain visible and near IR photographic and radiometric images of the earth. A data collection system (DCS) was also used to collect information from remote individually equipped ground stations and to relay the data to central acquisition stations. LANDSAT 2 carried two wide-band video tape recorders (WBVTR), capable of storing up to 30 min of scanner or camera data. An advanced attitude control system, consisting of horizon scanners, sun sensors, and a command antenna combined with a freon gas propulsion system, permitted the spacecraft's orientation to be controlled to within plus or minus 0.7 deg in all three axes. Spacecraft communications included a command subsystem operating at 154.2 and 2106.4 MHz and a PCM narrow-band telemetry subsystem, operating at 2287.5 and 137.86 MHz, for spacecraft housekeeping, attitude, and sensor performance data. Video data from the three-camera RBV system were transmitted in both real time and from WBVTR at 2276.5 MHz, while information from the MSS was constrained to a 20-MHz rf bandwidth at 2229.5 MHz.

Alternate Names

  • Earth Res. Tech. Sat.-B
  • PL-733D
  • ERTS-B
  • 07615
  • Landsat2

Facts in Brief

Launch Date: 1975-01-22
Launch Vehicle: Delta
Launch Site: Vandenberg AFB, United States
Mass: 816 kg

Funding Agency

  • NASA-Office of Space Science Applications (United States)

Disciplines

  • Engineering
  • Earth Science

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. James C. WelchProgram ManagerNASA Headquarters
Mr. Charles M. MacKenzieProject ManagerNASA Goddard Space Flight Center
Dr. Stanley C. FredenProject ScientistNASA Goddard Space Flight Center
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