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  3. earthsciencesensors
  4. _c_8b330764
experimental

Entry: POSEIDON-3

URI: https://terra-vocabulary.org/ncl/FAIR-Incubator/earthsciencesensors/c_8b330764

The Poseidon-3 radar altimeter is the main instrument on the Jason-2 mission. Derived from the Poseidon-1 altimeter on Topex/Poseidon and the Poseidon-2 on Jason-1, it measures sea level, wave heights and wind speed. The Poseidon-3 altimeter emits pulses at two frequencies 13.6 and 5.3 GHz to measure the distance from the satellite to the surface (range). Free electrons in the atmosphere can delay the signal's return, affecting the measurement accuracy. The delay is directly related to the radar frequency, so the difference between the two measurements can be used to determine atmospheric electron content. Poseidon-3 is coupled with Doris/Diode, to improve measurements over coastal areas, inland waters and ice.

Core metadata

is a Concept | Sensor
changed on 1 Dec 2023 10:43:54.329
submitted byViqui Agazzi
accepted on 29 Sep 2022 09:14:26.525

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date accepted 29 Sep 2022 09:14:26.525
date submitted 29 Sep 2022 09:11:14.836
definition
entity POSEIDON-3
source graph graph

item class Sensor | Concept
label POSEIDON-3
modified 1 Dec 2023 10:43:54.329
notation c_8b330764
register earthsciencesensors
status status experimental
submitter
account name victoria.agazzi@teledetection.fr
name Viqui Agazzi

type register item
version info 3
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Definition

broader Radar Altimeters
definition The Poseidon-3 radar altimeter is the main instrument on the Jason-2 mission. Derived from the Poseidon-1 altimeter on Topex/Poseidon and the Poseidon-2 on Jason-1, it measures sea level, wave heights and wind speed. The Poseidon-3 altimeter emits pulses at two frequencies 13.6 and 5.3 GHz to measure the distance from the satellite to the surface (range). Free electrons in the atmosphere can delay the signal's return, affecting the measurement accuracy. The delay is directly related to the radar frequency, so the difference between the two measurements can be used to determine atmospheric electron content. Poseidon-3 is coupled with Doris/Diode, to improve measurements over coastal areas, inland waters and ice.
exact match 842c4fea afe2 4ed1 aade ccce65cfb121
label POSEIDON-3
pref label POSEIDON-3
type Concept | Sensor