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Data Collection System

NSSDCA ID: 1972-058A-03

Mission Name: Landsat 1
Principal Investigator:Mr. J. Earle Painter


The purpose of the Landsat 1 Data Collection System (DCS) was to obtain data from remote, automatic data collection platforms (DCP), which were equipped by specific investigators, and relay the data to ground stations whenever the Landsat spacecraft could mutually view any platform and any one of the ground stations. The DCS provided a continual flow of information to be used for management of wildlife, marine, agriculture, water, and forestry resources. These data could also lead to improved weather forecasts, pollution control, and earthquake prediction and warning. The environmental sensors mounted on a DCP were selected by individual investigators to satisfy their particular requirements. Up to eight individual sensors could be connected to a single DCP. From a nominal orbital altitude of approximately 900 km, the spacecraft was capable of acquiring data from DCPs within a radius of approximately 3100 km from the subsatellite point, thus allowing data to be obtained from any remote platform at least once every 12 h. The DCPs transmitter frequency was 1.55 MHz. The DCS equipment, essentially a receiver, received and retransmitted data (at 2287.5) to selected ground receiving stations. There was no signal multiplexing or data processing on the satellite. The Landsat DCS could accommodate up to 1000 DCPs deployed throughout the continental U.S. The DCS initially consisted of a pilot group of only six DCPs, with user agencies procuring, instrumenting, and developing additional platforms according to their needs. Data from this experiment were handled and distributed to the various platform investigators by the NASA Data Processing Facility, GSFC, Greenbelt, Md. This experiment was successful until January 6, 1978, when the spacecraft was turned off.

Alternate Names

  • DCS
  • Landsat1/DCS

Funding Agency

  • Unknown (United States)


  • Engineering: None assigned
  • Earth Science: None assigned

Additional Information

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



NameRoleOriginal AffiliationE-mail
Mr. J. Earle PainterPrincipal InvestigatorNASA Goddard Space Flight Center
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