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- a3452367-b483-4893-a377-7d1d343424a7 type Concept @default.
- a3452367-b483-4893-a377-7d1d343424a7 broader 92ddaaca-40b2-4936-bc1a-28cc5743e8b8 @default.
- a3452367-b483-4893-a377-7d1d343424a7 definition "Path = ['Radar Altimeters', 'Altimeters', 'Active Remote Sensing', 'Earth Remote Sensing Instruments', 'Instruments'] NRA or Nasa Radar Altimeter (206 kg including redundancy, 237 W), operating at 13.6 GHz (Ku band) and 5.3 GHz (C band) simultaneously is provided by Nasa. It is the fifth generation of altimeter; its design is based on the previous SEASAT and GEOSAT altimeters with significant improvements including the 5.3 GHz channel for the ionospheric measurement. It is the primary sensor for the Topex/Poseidon mission. The measurements made at the two frequencies are combined to obtain the altimeter height of the satellite above the sea (satellite range), the wind speed modulus, the significant wave height and the ionospheric correction." @default.
- a3452367-b483-4893-a377-7d1d343424a7 inScheme concept_scheme @default.
- a3452367-b483-4893-a377-7d1d343424a7 prefLabel "NRA" @default.