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

E/I-Vector Separation for Safe Switching of the GRACE Formation

Montenbruck, Oliver and Kirschner, Michael and D'Amico, Simone and Bettadpur, Srinivas (2006) E/I-Vector Separation for Safe Switching of the GRACE Formation. Aerospace Science and Technology, 10 (7), pp. 628-635. Elsevier. DOI: DOI 10.1016/j.ast.2006.04.001

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/


After more than three years in orbit, a longitude swap maneuver was required to exchange the leading and trailing spacecraft of the GRACE formation. While the two satellites are nominally separated by about 220km in along-track direction, a close encounter took place during the swap sequence. Based on the successful use for co-location of geo-stationary satellites, the concept of eccentricity/inclination vector separation has been suggested for safe proximity operations in this mission phase. Taking care of the natural evolution of the relative orbital elements of GRACE 1 and 2, optimum maneuver dates were identified. By proper timing of the maneuvers a safe limit for the minimum distance during the encounter could be guaranteed even in case of arbitrary thruster performance errors. This allowed the use of a fuel optimal maneuver sequence with individual drift start and stop maneuvers. The paper provides a conceptual outline and mathematical description of the e/i-vector separation for spacecraft formations in low Earth orbit and discusses the GRACE longitude swap maneuvers.

Item URL in elib:https://elib.dlr.de/21477/
Document Type:Article
Title:E/I-Vector Separation for Safe Switching of the GRACE Formation
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bettadpur, SrinivasUT/CSRUNSPECIFIED
Date:14 January 2006
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :DOI 10.1016/j.ast.2006.04.001
Page Range:pp. 628-635
Keywords:Formationsflug, nahe Begegnung, e/i-Vektor Trennung, GRACE, Formation flying, proximity operations, e/i-vector separation, GRACE
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W SY - Technik für Raumfahrtsysteme
DLR - Research area:Space
DLR - Program:W SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):W - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training
Deposited By: Montenbruck, Dr.rer.nat.hab. Oliver
Deposited On:22 Jan 2007
Last Modified:14 Jan 2010 20:46

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.