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Long-Term System Monitoring of Radiometric Stability – Current Status of TerraSAR-X and TanDEM-X

Schmidt, Kersten and Castellanos Alfonzo, Gabriel and Bachmann, Markus and Polimeni, Maria Donata and Tous Ramon, Núria and Schwerdt, Marco (2015) Long-Term System Monitoring of Radiometric Stability – Current Status of TerraSAR-X and TanDEM-X. CEOS SAR Workshop on Calibration and Validation (CEOS SAR CalVal), 2015-10-27 - 2015-10-29, Noordwijk, The Netherlands.

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Abstract

The TerraSAR-X and the TanDEM-X satellite produce high quality SAR images for a number of scientific and commercial applications. To guarantee the stability of the high accurate SAR products both systems are permanently monitored. The intention of this paper is to present the latest results of Long-Term System Monitoring (LTSM) in order to demonstrate the remarkable performance of both systems since launch. The study extends previous evaluations and updates their results. The evaluations focus on the three major indicators for monitoring the radiometric accuracy and stability of the SAR systems: - the radiometric properties of all T/R modules, i.e. the monitoring of gain and phase which are recorded within the SAR instrument and used for internal calibration, - the antenna pattern stability and deviations to the antenna model obtained from acquisitions over the Amazon rainforest – known as widely, uniformly distributed backscattering area, and - radiometric accuracy and stability of the SAR instrument derived from permanently mounted point targets, including integrated and peak-to-sidelobe ratio. For the latter a monitoring area with four corner reflectors was established and has been operated by the Institute near Neustrelitz since the beginning of TerraSAR-X operational phase in 2008 which will ensure a reliable monitoring of both SAR systems over the entire life time.

Item URL in elib:https://elib.dlr.de/98091/
Document Type:Conference or Workshop Item (Speech)
Title:Long-Term System Monitoring of Radiometric Stability – Current Status of TerraSAR-X and TanDEM-X
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmidt, KerstenUNSPECIFIEDUNSPECIFIED
Castellanos Alfonzo, GabrielUNSPECIFIEDUNSPECIFIED
Bachmann, MarkusUNSPECIFIEDUNSPECIFIED
Polimeni, Maria DonataUNSPECIFIEDUNSPECIFIED
Tous Ramon, NúriaUNSPECIFIEDUNSPECIFIED
Schwerdt, MarcoUNSPECIFIEDUNSPECIFIED
Date:October 2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:TerraSAR-X, Radimetric Calibration, Long-term system monitoring
Event Title:CEOS SAR Workshop on Calibration and Validation (CEOS SAR CalVal)
Event Location:Noordwijk, The Netherlands
Event Type:international Conference, Workshop
Event Dates:2015-10-27 - 2015-10-29
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Schmidt, Dr. Kersten
Deposited On:07 Sep 2015 08:09
Last Modified:20 Jan 2016 09:22

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