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... > Instruments > Earth Remote Sensing Instruments > Active Remote Sensing > Altimeters > Radar Altimeters > ALT (TOPEX)

Preferred term

ALT (TOPEX)  

Definition

  • TOPEX Altimeter Sensor/Instrument: The TOPEX altimeter is a dual frequency radar instrument which draws upon a long heritage of single-frequency altimeters extending back to Seasat. The primary channel for the altimeter is Ku-band (13.6 GHz), and the secondary channel is C-band (5.3 GHz). Inclusion of the secondary channel allows correction for propagation delays in the ionosphere, reducing a significant error source in the measurement. The ALT was developed and built by the Applied Physics Laboratory of the John Hopkins University (APL/JHU) under contract to the Wallops Flight Facility of NASA's Goddard Space Flight Center (GSFC) on behalf of JPL. Additional information available at "http://podaac.jpl.nasa.gov:2031/SENSOR_DOCS/topex_alt.html" [Summary provided by NASA] (en)

Broader concept

URI

https://gcmd.earthdata.nasa.gov/kms/concept/ab172a97-a1ed-4a5b-ba0b-8b39685b76a5

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