On the use of Numerical Weather Models for improving SAR geolocation accuracy

Abstract

In order to ensure sub-pixel accuracy of geocoded SAR products, precise estimation and correction of theAtmospheric Path Delay (APD) is needed, in particular for the new generation of high resolution satellite SARsensors (TerraSAR-X, COSMO-SkyMed). The goal of the present study is to assess the performances ofoperational Numerical Weather Models (NWM) as tools for APD mitigation. The Regional AtmosphericModeling System (RAMS) has been selected for this purpose. In order to guarantee an accurate knowledge ofboth the satellite orbit and the target position, TerraSAR-X data and corner reflectors have been used for theexperiment. Differential GPS measurements confirm that NWM are able to estimate APD with an accuracy offew decimeters. Therefore, NWM can be also exploited as tools for providing preliminary indications on theamount of orbital or timing errors. The analysis has been hence extended to COSMO-SkyMed data.


Tutti gli autori

  • D. O. Nitti; F. Bovenga; R. Nutricato; A. Refice; M. F. Bruno; A. F. Petrillo; M. T. Chiaradia

Titolo volume/Rivista

Non Disponibile


Anno di pubblicazione

2014

ISSN

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ISBN

978-3-8007-3607-2


Numero di citazioni Wos

Nessuna citazione

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Settori ERC

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Codici ASJC

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