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DMSP Block 5D
DMSP
DMSP
Credit: USAF
American earth weather satellite. Defense Meteorological Satellite Program. USA satellite built by RCA Astro for Meteorology, USA. Launched 1976 - 1980.

AKA: Defense Meteorological Satellite Program. Status: Operational 1976. First Launch: 1976-09-11. Last Launch: 1980-07-15. Number: 5 . Gross mass: 400 kg (880 lb).


More at: DMSP Block 5D.

Family: Earth, Earth weathersat, Sun synchronous orbit. Country: USA. Launch Vehicles: Thor, Delta, Thor DSV-2U. Projects: DMSP. Launch Sites: Vandenberg, Vandenberg SLC10W. Agency: USAF. Bibliography: 2, 5, 6, 12235.
Photo Gallery

DMSP-5D1 F1DMSP-5D1 F1
Credit: Manufacturer Image


AMS 2AMS 2
Credit: Manufacturer Image



1976 September 11 - . 08:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Thor. Launch Vehicle: Thor DSV-2U.
  • AMS 1 - . Payload: DMSP 5D S-1 / OPS 5721. Mass: 450 kg (990 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5D. USAF Sat Cat: 9415 . COSPAR: 1976-091A. Apogee: 833 km (517 mi). Perigee: 804 km (499 mi). Inclination: 98.5000 deg. Period: 101.30 min. A Thor booster carrying the first DMSP Block 5D satellite was launched from SLC-10, Western Test Range. The launch was successful but the satellite lost stability and began to tumble after attaining orbit. Defense Meteorological Satellite Program..

1977 March 24 - .
  • The first DMSP Block 5D satellite, which had gone into a spin following its launch in September 1976, was successfully de-spun. This action climaxed a three phase recovery effort. - . Spacecraft: DMSP Block 5D.

1977 March 28 - .
  • A software patch was uploaded into the computer of the first DMSP Block 5D satellite. The patch allowed the satellite to function without the services of its roll gyro, which was about to go bad. - . Spacecraft: DMSP Block 5D.

1977 May 17 - .
  • Software modifications were installed in the computer of the first DMSP Block 5D satellite, allowing its attitude control system to function without the pitch and yaw gyros. - . Spacecraft: DMSP Block 5D. Coupled with an earlier modification which had allowed the satellite to function without the roll gyro, this action prevented the spacecraft from being lost due to deterioration of its gyros..

1977 June 5 - . 02:59 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Thor. Launch Vehicle: Thor DSV-2U.
  • AMS 2 - . Payload: DMSP 5D S-2/Star 37S S/N 15003 / OPS 5644. Mass: 450 kg (990 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5D. USAF Sat Cat: 10033 . COSPAR: 1977-044A. Apogee: 849 km (527 mi). Perigee: 788 km (489 mi). Inclination: 99.0000 deg. Period: 101.30 min.

    An LV-2F booster launched the second DMSP Block 5D satellite into orbit from Vandenberg AFB, California. The launch was marred by a series of anomalies which put the satellite in a retrograde orbit and a spinning condition. Defense Meteorological Satellite Program.


1977 June 25 - .
  • An Air Force/contractor team completed recovery of the second DMSP Block 5D satellite, which had gone into a spin following its launch earlier in the month. - . Spacecraft: DMSP Block 5D.

1977 July 1 - .
  • The Aerojet ElectroSystems Company delivered the first flight model of the SSM/T, a microwave temperature sounder that would be flown on DMSP Block 5D satellites. - . Spacecraft: DMSP Block 5D.

1977 Sep - .
  • The Air Force came up with $95,000 to initiate the development of the SSM/I, a microwave imager to be flown on DMSP Block 5D satellites. - . Spacecraft: DMSP Block 5D. Development of the imager had previously been jeopardized when the Director of Defense Research Engineering had withdrawn funding from the project..

1977 October 6 - .
  • The primary sensor failed on DMSP satellite F-33. - . Spacecraft: DMSP Block 5D.

1977 Nov - .
  • HQ USAF directed AFSC to initiate the Lifetime Extension Program for the DMSP Block 5D satellite. - . Spacecraft: DMSP Block 5D.

1978 May 1 - . 03:05 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Thor. Launch Vehicle: Thor DSV-2U.
  • AMS 3 - . Payload: DMSP 5D S-3 / OPS 6182. Mass: 513 kg (1,130 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5D. USAF Sat Cat: 10820 . COSPAR: 1978-042A. Apogee: 799 km (496 mi). Perigee: 786 km (488 mi). Inclination: 98.7000 deg. Period: 100.70 min. A Thor LV-2F was launched from Vandenberg AFB carrying the third DMSP Block 5D-1 satellite. The launch was successful, and the spacecraft and its sensors functioned normally once in orbit. Defense Meteorological Satellite Program..

1979 January 17 - .
  • A contract to define a Stored Telemetry Processing System for the DMSP program was awarded to Systems and Applied Sciences, a minority small business. - . Spacecraft: DMSP Block 5D.

1979 March 21 - .
  • SAMSO awarded the Harris Corporation a $10.3 million contract to develop a Satellite Data Handling System for the DMSP program. - . Spacecraft: DMSP Block 5D. The system would be installed at the Air Force Global Weather Central at Offutt AFB, Nebraska, and would allow forecasters to analyze and distribute weather data obtained from DMSP satellites..

1979 April 25 - .
  • SAMSO awarded $200,000 contracts to five companies - RCA, GE, Rockwell International, Lockheed, and Hughes - to do conceptual studies on a DMSP Block 6 satellite. - . Spacecraft: DMSP Block 5D. The studies were finished in September, but by that time there were indications that the White House might disapprove the development of Block Six and order development of a shuttle-compatible Block 5D instead..

1979 Jun - .
  • A DMSP shipboard terminal was installed on the aircraft carrier USS Midway. - . Spacecraft: DMSP Block 5D.

1979 June 6 - . 18:22 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Thor. Launch Vehicle: Thor DSV-2U.
  • AMS 4 - . Payload: DMSP 5D S-5 / OPS 5390. Mass: 513 kg (1,130 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5D. USAF Sat Cat: 11389 . COSPAR: 1979-050A. Apogee: 826 km (513 mi). Perigee: 805 km (500 mi). Inclination: 98.6000 deg. Period: 101.20 min. A Thor LV-2F booster successfully launched the fourth DMSP Block 5D-1 satellite into low earth orbit. The launch site was Space Launch Complex 10, Vandenberg AFB, California. Defense Meteorological Satellite Program..

1979 July 1 - .
  • Installation of Mark IIA terminals for the DMSP Program was completed. The Mark IIA terminals had been created by reconfiguring and improving the Mark I and II transportable terminals. - . Spacecraft: DMSP Block 5D.

1979 July 3 - .
  • SAMSO awarded the Hughes Aircraft Company a $21.3 million contract to develop a microwave imager for the DMSP Block 5D-2 satellite. - . Spacecraft: DMSP Block 5D. The imager would measure the intensity of precipitation over land and water, the temperature of the sea surface, the speed of the wind over the ocean, the thickness and extent of sea ice, and the moisture content of the soil..

1979 July 17 - .
  • The Data Multiplexing System was declared operational. The system had been installed at various DMSP ground sites, and it allowed payload data and telemetry to be transmitted from one site to another. - . Spacecraft: DMSP Block 5D.

    It also opened up a communication link between the Kaena Point Tracking Station, in Hawaii, and the Air Force Global Weather Central in Nebraska, thereby allowing the Global Weather Central to receive stored weather data from Hawaii as well as from Washington and Maine.


1979 September 16 - .
  • DMSP Satellite F-l was declared non-operational after the second of its two computers went off-line due to a failure in the power subsystem. - . Spacecraft: DMSP Block 5D.

1979 September 21 - .
  • SAMSO signed a $24.1 million letter contract for two DMSP spacecraft (F-8 and F-9) and long lead parts for a third (F-10). - . Spacecraft: DMSP Block 5D. The contract incorporated the toughest negative incentives ever inserted into a spacecraft contract up to that time. It was structured in that manner in obedience to new procurement guidelines issued by the AFSC commander, General Slay..

1980 July 15 - . 02:22 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC10W. LV Family: Thor. Launch Vehicle: Thor DSV-2U. FAILURE: Separation problem gutted wiring from spacecraft.. Failed Stage: 2.
  • AMS 5 - . Payload: DMSP 5D S-4. Mass: 513 kg (1,130 lb). Nation: USA. Agency: USAF. Program: DMSP. Class: Earth. Type: Weather satellite. Spacecraft: DMSP Block 5D. Decay Date: 1980-07-14 .

    Defense Meteorological Satellite Program. Although there was a press release immediately after the launch (by the spacecraft SPO) that said the 2nd stage motor exploded, in reality the problem was found to be due to poor design of the electrical connectors between the 2nd and third stages and a separation problem that ripped the wiring out of the spacecraft.



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