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Platforms > Space-based Platforms > Earth Observation Satellites > Environmental Science Services Administration (ESSA) > ESSA-9

Preferred term

ESSA-9  

Definition

  • The ESSA-9 satellite replaced ESSA-7 and provided cloud-cover photography to the US's National Meteorological Center for the purpose of preparing operational weather analyses and forecasts. The spacecraft was an 18-sided polygon, 42 inches in diameter, 22 inches high and weighed 320 pounds. The craft was made of aluminum alloy and stainless steel then covered with 10,020 solar cells. The solar cells served to charge the 63 nickel-cadmium batteries. The two cameras were mounted 180-degrees opposite each other along the side of the cylindrical craft. The "cartwheel" configuration of the TIROS-9 was selected as the orbital configuration of the operational series of ESSA satellites. Therefore, a camera could be pointed at some point on Earth every time the satellite rotated along its axis. The spacecraft operating system was the same as on the TIROS-9. The craft was placed in its planned Sun-synchronous 102-degree inclination retrograde orbit. The satellite spin axis was rotated using the magnetic attitude control system into an alignment perpendicular to the orbital plane and tangent to the Earth's surface. The ESSA-7 system transmitted images covering 2000-square mile areas with 2-mile resolution from every location once per day. Two arrays of radiometer sensors were also mounted 180-degrees apart to measure the global distribution of solar radiation reflected by the Earth and the Earth's atmosphere, as well as the long wave emissions from the Earth (a contribution from the NIMBUS program). ESSA-9 stats: Launch Date: February 26, 1969 Operational Period: 1,726 days until deactivated by NASA on November 15, 1972 Launch Vehicle: Three stage, thrust augmented, improved Delta Launch Site: Cape Canaveral, FL Type: Weather Satellite Top of Page | Back to Missions Phase: Past Full Name: Environmental Science Services Administration Satellite Program Launch Date: February 03, 1966 (en)

Broader concept

Entry terms

  • TOS-G (en)

Change note

  • 2018-10-30 11:45:36.0 [sritz] Insert Concept add broader relation (ESSA-9 [1dc828a8-8502-479d-b7c4-d5139c06029a,368211] - ESSA [65cb3e7c-d4d8-46df-a5fc-aec63e58e8df,345109]);
  • 2018-10-30 13:05:27.0 [sritz] insert Definition (id: null text: The ESSA-9 satellite replaced ESSA-7 and provided cloud-cover photography to the US's National Meteorological Center for the purpose of preparing operational weather analyses and forecasts. The spacecraft was an 18-sided polygon, 42 inches in diameter, 22 inches high and weighed 320 pounds. The craft was made of aluminum alloy and stainless steel then covered with 10,020 solar cells. The solar cells served to charge the 63 nickel-cadmium batteries. The two cameras were mounted 180-degrees opposite each other along the side of the cylindrical craft. The "cartwheel" configuration of the TIROS-9 was selected as the orbital configuration of the operational series of ESSA satellites. Therefore, a camera could be pointed at some point on Earth every time the satellite rotated along its axis. The spacecraft operating system was the same as on the TIROS-9. The craft was placed in its planned Sun-synchronous 102-degree inclination retrograde orbit. The satellite spin axis was rotated using the magnetic attitude control system into an alignment perpendicular to the orbital plane and tangent to the Earth's surface. The ESSA-7 system transmitted images covering 2000-square mile areas with 2-mile resolution from every location once per day. Two arrays of radiometer sensors were also mounted 180-degrees apart to measure the global distribution of solar radiation reflected by the Earth and the Earth's atmosphere, as well as the long wave emissions from the Earth (a contribution from the NIMBUS program). ESSA-9 stats: Launch Date: February 26, 1969 Operational Period: 1,726 days until deactivated by NASA on November 15, 1972 Launch Vehicle: Three stage, thrust augmented, improved Delta Launch Site: Cape Canaveral, FL Type: Weather Satellite Top of Page | Back to Missions Phase: Past Full Name: Environmental Science Services Administration Satellite Program Launch Date: February 03, 1966 language code: en);
  • 2018-11-14 10:40:23.0 [sritz] insert AltLabel (id: null category: primary text: Environmental Science Services Administration Satellite 9 language code: en);
  • 2018-11-14 10:40:55.0 [sritz] insert AltLabel (id: null category: null text: TOS-G language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/1dc828a8-8502-479d-b7c4-d5139c06029a

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