Design status of a combined Ka-band altimeter/radiometer

In preparation of the post ENVISAT and Jason-2 altimetry missions, Alcatel has completed a phase A study for CNES on a new class of altimeter. A major objective is to propose a combined altimeter and radiometer at minimum cost, size and power consumption compatible with a micro satellite (

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Main Authors: Caubet, E., Pralippou, L.
Format: Conference Proceeding
Language:English
Subjects:
Altimetry
Bandwidth
Costs
Energy consumption
Frequency
High power amplifiers
Microwave radiometry
Oceans
Sampling methods
Satellite broadcasting
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Pralippou, L.
description In preparation of the post ENVISAT and Jason-2 altimetry missions, Alcatel has completed a phase A study for CNES on a new class of altimeter. A major objective is to propose a combined altimeter and radiometer at minimum cost, size and power consumption compatible with a micro satellite (
doi_str_mv 10.1109/IGARSS.2001.976108
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The proposed architecture for the Ka-band altimeter is based on the classical deramp technique for pulse compression and it takes benefits of Alcatel and CNES experience from the realisations of Poseidon 1 &amp; 2. The radiometer is of the total power type and is based on direct detection. The altimeter and the radiometer share the same antenna. 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The Ka-band (35 GHz) is more interesting than the Ku-band for the altimeter since it improves the link budget and allows larger bandwidth (500 MHz) and pulse repetition frequency (4 kHz). From the scientific point of view, Ka-band altimeter data would give access to a different part of the sea surface roughness spectrum and thus would complement the C+Ku measurements available from other altimeters. The microwave radiometer, used for wet path delay correction, is a dual-frequency instrument (23.8 &amp; 36.8 GHz). The proposed architecture for the Ka-band altimeter is based on the classical deramp technique for pulse compression and it takes benefits of Alcatel and CNES experience from the realisations of Poseidon 1 &amp; 2. The radiometer is of the total power type and is based on direct detection. The altimeter and the radiometer share the same antenna. 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subjects Altimetry
Bandwidth
Costs
Energy consumption
Frequency
High power amplifiers
Microwave radiometry
Oceans
Sampling methods
Satellite broadcasting
title Design status of a combined Ka-band altimeter/radiometer
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