elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

On-Ground Attitude and Torque Reconstruction tor the Gaia Mission

Samaan, Malak and Theil, Stephan (2008) On-Ground Attitude and Torque Reconstruction tor the Gaia Mission. In: Proceedings of the AAS/AIAA Space Flight Mechanics Winter Meeting 2008. AAS/AIAA Space Flight Mechanics Winter Meeting; 2008, 2008-01-27 - 2008-01-31, Galveston, Texas (USA).

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
1MB

Abstract

The work presented in this paper concerns the accurate On-Ground Attitude (OGA) reconstruction for the astrometry spacecraft Gaia in the presence of disturbance and control torques acting on the spacecraft. The reconstruction of the expected environmental torques which influence the spacecraft dynamics will be also investigated. The telemetry data from the spacecraft will include the on-board real time attitude which is of order of several arcsec. This raw attitude is the starting point for the further attitude reconstruction. The OGA will use the inputs from the field coordinates of known stars (attitude stars) and also the field coordinate differences of objects on the Sky Mapper (SM) and Astrometric Field (AF) payload instruments to improve this raw attitude. The on-board attitude determination uses Kalman Filter (KF) to minimize the attitude errors and produce more accurate attitude estimation than the pure star tracker measurement. Therefore the first approach for the OGA will be an adapted version of KF. Furthermore, we will design a batch least squares algorithm to investigate having more accurate OGA estimation. Finally, a comparison between these different attitude determination techniques in terms of accuracy, robustness, speed and memory required will be evaluated in order to choose the best attitude algorithm for the OGA. The expected resulting accuracy for the OGA determination will be on the order of milli-arcsec.

Document Type:Conference or Workshop Item (Paper)
Title:On-Ground Attitude and Torque Reconstruction tor the Gaia Mission
Authors:
AuthorsInstitution or Email of Authors
Samaan, MalakUNSPECIFIED
Theil, StephanUNSPECIFIED
Date:January 2008
Journal or Publication Title:Proceedings of the AAS/AIAA Space Flight Mechanics Winter Meeting 2008
Refereed publication:No
In ISI Web of Science:No
Status:Published
Keywords:attitude determination, reconstruction, Kalman Filter
Event Title:AAS/AIAA Space Flight Mechanics Winter Meeting; 2008
Event Location:Galveston, Texas (USA)
Event Type:international Conference
Event Dates:2008-01-27 - 2008-01-31
Organizer:AAS/AIAA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignement
DLR - Research area:Space
DLR - Program:W - no assignement
DLR - Research theme (Project):W -- no assignement (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Regelungs- und Datensysteme
Deposited By: Dr.-Ing. Stephan Theil
Deposited On:12 Jan 2009
Last Modified:12 Dec 2013 20:35

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.