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- 2e4252b9-5b53-41bb-8212-1e63a540181f definition "The ESSA-7 satellite replaced ESSA-5 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 9100 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-7 Stats: Launch Date: August 16, 1968 Operational Period: 571 days until deactivated by NASA on March 10, 1970 Launch Vehicle: Two stage long tank Delta Launch Site: Vandenberg Air Force Base, CA Type: Weather Satellite" @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f id "1653153" @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f path_id 3466eed1-2fbb-49bf-ab0b-dc08731d502b @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f path_id 65cb3e7c-d4d8-46df-a5fc-aec63e58e8df @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f path_id b39a69b4-c3b9-4a94-b296-bbbbe5e4c847 @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f path_id f3261de5-34c1-4980-af22-f9d7e7206d12 @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f path_label "Earth Observation Satellites" @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f path_label "Environmental Science Services Administration (ESSA)" @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f path_label "Platforms" @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f path_label "Space-based Platforms" @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f prefLabel "ESSA-7" @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f reference "https://science.nasa.gov/missions/essa" @default.
- 2e4252b9-5b53-41bb-8212-1e63a540181f tag "Platforms" @default.