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DMSP 5B/F5

NSSDCA/COSPAR ID: 1974-015A

Description

DMSP (74-015A), also known as DMSP 8531, was one of a series of meteorological satellites developed and operated by the Air Force under the Defense Meteorological Satellite Program. This program, previously known as Data Acquisition and Processing Program (DAPP), was classified until March 1973. The objective of this program was to provide global visual and infrared (IR) cloudcover data and specialized environmental data to support Department of Defense requirements. Operationally, the program consisted of two satellites in 830 km sun-synchronous polar orbits, with the ascending node of one satellite near the sunrise terminator and the other near local noon. The satellite, shaped like the frustum of a polyhedron, consisted of four subassemblies -- (1) a solar array hat, (2) a base-plate assembly, (3) a sensor AVE (Aerospace Vehicle Electronics) package (SAP), and (4) a data processing system. The primary sensor (SAP) was a four channel scanning radiometer. Secondary sensors included a vertical temperature profile radiometer (supplementary sensor E - SSE), an electron spectrograph (supplementary sensor J/2 - SSJ/2), and a lightning detector (supplementary sensor L - SSL), which were mounted, along with the primary sensor, on the base-plate assembly. Spacecraft stabilization was controlled by a combination flywheel and magnetic coil system so that the sensors were maintained in the desired earth-looking mode. The data processing system included three tape recorders capable of storing a total of 440 min of data, which allowed full global coverage twice daily. Either recorded or real-time data were transmitted to ground receiving sites via an s-band transmitter. Recorded data were read out to tracking sites located at Fairchild AFB, WA, and Loring AFB, ME, and relayed to Air Force Global Weather Central, Offutt AFB, NE. Real-time data were read out at mobile tactical sites located around the world.

Alternate Names

  • DMSP 8531
  • 07218

Facts in Brief

Launch Date: 1974-03-16
Launch Vehicle: Thor
Launch Site: Vandenberg AFB, United States
Mass: 195.0 kg

Funding Agency

  • Department of Defense-Department of the Air Force (United States)

Disciplines

  • Earth Science
  • Space Physics

Additional Information

Questions or comments about this spacecraft can be directed to: Dr. Dieter K. Bilitza.

 

Personnel

NameRoleOriginal AffiliationE-mail
Project ManagerUS Air Force Space Division 
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