| definition
| - [Source: National Space Science Data Center, http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1997-012A ]
DMSP 5D-2/F14, also named USA 131, is one of a series of meteorological satellites developed and operated by the Air Force under the Defense Meteorological Satellite Program (DMSP). This program, previously known as DAPP (Data Acquisition and Processing Program), was classified until March 1973. The objective of this program is to provide global visual and infrared cloudcover data and specialized environmental data to support Department of Defense operational weather analysis and forecasting requirements. Operationally, the program consists of two satellites in sun-synchronous polar orbits, with the ascending node of one satellite in early morning and the other at local noon.
The 6.4-m-long spacecraft is separated into four sections: (1) a precision mounting platform for sensors and equipment requiring precise alignment; (2) an equipment support module containing the electronics, reaction wheels, and some meteorological sensors; (3) a reaction control equipment support structure containing the third-stage rocket motor and supporting the ascent phase reaction control equipment; and (4) a 9.29-sq-m solar cell panel. The spacecraft stabilization is controlled by a combination flywheel and magnetic control coil system so that sensors are maintained in the desired earth-looking mode. One feature is the precision-pointing accuracy of the primary imager to 0.01 deg provided by a star sensor and an updated ephemeris navigation system. This allows automatic geographical mapping of the digital imagery to the nearest picture element.
The operational linescan system is the primary data acquisition system and provides real-time or stored, multi-orbit, day-and-night, visual and infrared imagery of clouds. A supplementary sensor package contains: (1) a microwave imager; (2) a microwave temperature sounder; (3) a microwave water vapor profiler; (4) an ion and electron scintillation monitor; (5) a precipitating electron/ion spectrometer; (6) a gamma/X-ray detector; (7) a magnetometer; and (8) a static earth-viewing sensor monitoring electromagnetic radiation.
Additional information concerning the satellite can be found in the report by D. A. Nichols, "The Defense Meteorological Satellite Program," Optical Engineering, v. 14, n. 4, p. 273, July-August 1975.
Group: Platform_Details
Entry_ID: DMSP 5D-2/F14
Group: Platform_Identification
Platform_Category: Earth Observation Satellites
Platform_Series_or_Entity: DMSP (Defense Meteorological Satellite Program)
Short_Name: DMSP 5D-2/F14
Long_Name: Defense Meteorological Satellite Program-F14
End_Group
Group: Synonymous_Platform_Names
Short_Name: DMSP-F14
Short_Name: USA 131
Short_Name: 24753
End_Group
Group: Platform_Associated_Instruments
Short_Name: SSI/ES2
Short_Name: SSM/T
Short_Name: OLS
Short_Name: SSM/T-2
Short_Name: SSJ/4
Short_Name: SSM/I
Short_Name: SSB/X2
Short_Name: SSM
End_Group
Group: Orbit
Orbit_Inclination: 98.9°
Period: 101.8 minutes
Perigee: 843.0 km
Apogee: 854.0 km
Orbit_Type: LEO > Low Earth Orbit > Polar Sun-Synchronous
End_Group
Creation_Date: 2008-10-30
Online_Resource http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1997-012A Online_Resource http://heasarc.gsfc.nasa.gov/docs/heasarc/missions/dmsp.html Online_Resource http://www.ngdc.noaa.gov/dmsp/ Group: Platform_Logistics
Launch_Date: 1997-04-04
Launch_Site: Vandenberg Air Force Base, USA
Primary_Sponsor: Department of Defense-Department of the Air Force (United States)
End_Group
End_Group (en)
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