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The Operations Concept for Tandem-L – From Mission Goals to Spacecraft Requirements

Schulze, Daniel and Wecklich, Christopher and Bachmann, Markus and Kahle, Ralph and Wermuth, Martin (2019) The Operations Concept for Tandem-L – From Mission Goals to Spacecraft Requirements. 70th International Astronautical Congress (IAC), 21.-25. Okt. 2019, Washington D.C., USA.

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Abstract

Tandem-L is a highly innovative L-band SAR mission for the global observation of dynamic processes on the Earth’s surface with unprecedented quality and resolution. Two identical satellites of ~3000 kg will fly in a variable formation with separations between 500 meters and 20 kilometers. Thanks to a Large Deployable Reflector and digital beam forming techniques Tandem-L will support the science community with unique data in the areas of the biosphere, geosphere, cryosphere, and hydrosphere. The mission was proposed by the DLR Microwaves and Radar Institute and is currently in the requirements definition phase. The German Space Operations Center (GSOC) has participated since the early phase of the project during the development of the mission operations concept and by reviewing the studies from industrial partners. As DLR is responsible for contracting the space segment supplier, the recent goal has been to derive satellite system requirements from the mission requirements as well as from operational strategies. New technical opportunities and standards were analyzed and considered in the operations approach. Simultaneously, a working group was established to collect lessons learnt from previous missions operated at GSOC. This paper presents the mission operations concept and the new challenges compared to the precursor missions TerraSAR-X and TanDEM-X. Drivers are amongst others the volume of generated mission data of more than 8 terabytes per day, the highly variable formation, and the effects of the radar reflector on the orbit determination accuracy. Additionally, the derived satellite system requirements are discussed with a focus on the propulsion system, mutual radar illumination, the AOCS safe-mode, GNSS performance, the Ka-band downlink, and the on-board schedule.

Item URL in elib:https://elib.dlr.de/131661/
Document Type:Conference or Workshop Item (Speech)
Additional Information:IAC-19-B6.2.8
Title:The Operations Concept for Tandem-L – From Mission Goals to Spacecraft Requirements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schulze, DanielD.Schulze (at) dlr.deUNSPECIFIED
Wecklich, ChristopherChristopher.Wecklich (at) dlr.dehttps://orcid.org/0000-0001-5994-3298
Bachmann, MarkusMarkus.Bachmann (at) dlr.dehttps://orcid.org/0000-0002-6028-4303
Kahle, Ralphralph.kahle (at) dlr.deUNSPECIFIED
Wermuth, MartinMartin.Wermuth (at) dlr.deUNSPECIFIED
Date:21 October 2019
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Tandem-L, Operations Concept, Requirements
Event Title:70th International Astronautical Congress (IAC)
Event Location:Washington D.C., USA
Event Type:international Conference
Event Dates:21.-25. Okt. 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Tandem-L Vorstudien
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training
Deposited By: Schulze, Daniel
Deposited On:02 Dec 2019 17:07
Last Modified:02 Dec 2019 17:07

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