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Impact of TDX-1 Roll Steering on SAR Performance during TDM Science Phase

Kraus, Thomas (2015) Impact of TDX-1 Roll Steering on SAR Performance during TDM Science Phase. Project Report. TD-SEC-TN-4274. Institut für Hochfrequenztechnik und Radarsysteme. 51 S.

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This technical note summarizes the effect of the TanDEM-X Science Phase formations on the roll steering mechanism. The analyses became necessary since unique formations of the free flying TanDEM-X interferometer different from the ones flown up to now for the global DEM acquisition will be employed during the Science Phase. The challenges explicitly arise from a pursuit monostatic formation with a drifting phase of libration and a very large cross track baseline phase in a bistatic configuration. These challenges led to updates in the roll steering tool in order to be able to handle these formations. Additionally, a performance evaluation suite was developed, delivering estimates of the improvements achieved in terms of noise equivalent sigma zero (NESZ) performance by the use of roll steering as well as estimates of the NESZ degradation if roll steering would not be used. The output of the described analyses is a proposal for the attitude steering table update sequence during the TanDEM-X Science Phase based on performance considerations. Practical considerations like a maximum feasible update rate of the space-craft table are also taken into account.

Item URL in elib:https://elib.dlr.de/97673/
Document Type:Monograph (Project Report)
Title:Impact of TDX-1 Roll Steering on SAR Performance during TDM Science Phase
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:13 July 2015
Refereed publication:No
Open Access:No
Number of Pages:51
Keywords:attitude steering, roll steering, satellite attitude, SAR performance, NESZ
Institution:Institut für Hochfrequenztechnik und Radarsysteme
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Projekt TanDEM-X (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Kraus, Thomas
Deposited On:31 Jul 2015 10:00
Last Modified:31 Jul 2015 10:00

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