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Spatial variations in gravity exert influence on the ocean surface and thereby cause spatial structure in the geoid. The Geosat GM goal was to provide information on the marine gravity field. For generic geosats, see Geosynchronous satellite. Orbital meteorological and remote sensing systems. Retrieved from ” https: An opportunity existed to observe the next order physical process that affects the ocean surface. Payloads deployed from other spacecraft are denoted in brackets.
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Geeosat there are extreme waves and events tsunamis and hurricane surgetypical ocean features would be considered large if the water level change caused by them were 1 m.
When the ERM ended in Januarydue to failure of the two on-board tape recorders, more than three years of ERM data were collected and made available to the scientific community. The Geosat GM goal was to provide information on the marine gravity field.
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This page was last edited on 20 Mayat Orbital meteorological and remote sensing systems. Payloads deployed from geoxat spacecraft are denoted in brackets.
By measuring the position of the water surface above the Earth center, the geoid is observed, and the gravity field can be computed through inverse calculations. Once the GM goal had been reached, the satellite still had a useful life. Currentstides and wind forcing all create changes gfosat water levels.
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The initial phase was an month classified Geodetic Mission GM have a ground-track with a nearday repeat with closure to within 50 kilometers. These data were subsequently widely used to estimate ocean bathymetry along with additional satellite altimeters.
Uncatalogued launch failures are listed in italics. Subsurface features such as seamounts create a gravitational pull, and features such as geksat trenches create lower gravity areas. Navy on 30 June If the ocean surface were at rest, and to forcing such as tides or winds were acting on it, the water gdosat would lie along the geoid.
To first order, the Earth shape is an oblate spheroid. Despite a series of system failures aboard the spacecraft, controllers were able to successfully lower GFO to a disposal orbit and shut it down on November 25, March 13, Manned flights are indicated in bold text. Views Read Edit View history.
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In addition, GFO carried a GPS receiver which was never used operationallyDoppler receivers, and laser retro-reflectors for orbit determination.
From Wikipedia, the free encyclopedia. In this manner, the satellite could observe long term changes at the points along the ground track. Spatial variations in gravity exert influence on the ocean surface and thereby cause spatial structure in the geoid. The satellite would orbit the Earth, and after An opportunity gsosat to observe the next order physical process that affects the ocean surface.
Navy declassified parts of the Geodetic Mission data in that covered a doughnut-shaped area of ocean geisat surrounds Antarctica between 60 and 72 degrees south latitude. The ERM established the satellite in an exact repeat orbit. Artist’s interpretation of the Geosat satellite. Infurther parts of the Geodetic Mission geosa over the oceans south of 30 degrees south were released.
Retrieved from ” https: Archived from the original PDF on