The DMSP Block 5D-3 spacecraft, built under contract for the U.S. Air Force by Lockheed Martin Missiles & Space, was due to be launched in late October from Vandenberg Air Force Base aboard a Titan II launch vehicle.

The Block 5D-3 series can accommodate larger sensor payloads than earlier generations. They also feature a larger power supply; a more powerful on-board computer with increased memory -- allowing greater spacecraft autonomy -- and increased battery power that will extend the mean mission duration.

When the spacecraft is declared operational, the satellite will be turned over to the National Polar Orbiting Environmental Satellite System (NPOESS) Integrated Program Office (IPO). The IPO Assistant Director of Operations (ADO) will then officially delegate operational responsibility to the NOAA Office of Satellite Operations.

DMSP, operated by NOAA, is used for strategic and tactical weather prediction to aid the U.S. military in planning operations at sea, on land and in the air.

Equipped with a sophisticated sensor suite that can image visible and infrared cloud cover, the satellite collects specialized meteorological, oceanographic, and solar-geophysical information in all weather conditions.

The DMSP constellation comprises two spacecraft in near-polar orbits, and C3 and user segments. The most recent launch of a DMSP spacecraft took place on April 4, 1997 from Vandenberg Air Force Base. That launch marked the last of the Block 5D-2 satellites.

Currently, a backlog of six satellites is maintained at Missiles & Space for storage, functional testing, and upgrading. The spacecraft are shipped to Vandenberg when requested by the Air Force.

Since 1966, more than 30 Lockheed Martin DMSP satellites have been launched by the U.S. Air Force. Now in its fourth decade of service, the DMSP has proven itself to be a valuable tool in scheduling and protecting military operations on land, at sea and in the air.

The Space and Missiles Center at Los Angeles Air Force Base, CA manages the DMSP and Titan programs.

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