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DLR-TUBSAT was launched on May 26, 1998 on a Indian PSLV-C2 rocket as a secondary payload into a sun synchronous orbit (altitude 726km, inclination 98.38deg) together with KITSAT-3. The primary payload was the IRS-P4 satellite. The development of the DLR-TUBSAT was a joint project of TU Berlin and the German Aerospace Center (DLR). The satellite was designed for interactive earth observation where the target is not identified in advance and a search action is involved or the selected target has to be visually followed.


Earth Observation (Interactive Attitude Control)

Technology Demonstration (ACS wheel/gyros, low cost video imaging)
May 26, 1999 (Indian PSLV)

Last contact 2009 (Battery Failure)
Sun-synchronous, altitude 726km, inclination 98.4
44.8 kg, 32cmx32cmx32cm
4 aluminum compartments
Thermal Control
4 NiH2 battery cells, 12Ah, 10V

4 silicon solar panels (single string of 34 cells, max. 14W)
TTC: VHF (FFSK, 1200baud, 5W), UHF (FFSK, 1200baud, 3.5W)

Payload: S-Band (125kBaud BPL coded or analog video)
Attitude Control
3 wheel/gyros pairs, magnetorquer, sun sensor
Focal length 16mm, pixel resolution 375m (f/0.95, bw video)

Focal length 50mm, pixel resolution 120m (f/1.80, bw video)

Focal length 1000mm, pixel resolution 6m (f/11, bw video)

Flight Results: South Africa

Interactive Attitude Control Experiments in Capetown, South Africa.


Small Satellites: Past, Present, and Future

TUBSAT: The Technical University of Berlin Satellite Program

Matthias Buhl

The Aerospace Press, AIAA, Helvajian & Janson (Editors), 2008 (ISBN: 978-1-884989-22-3)

Interaktive Lageregelung bei Nacht mit dem Mikrosatelliten DLR-TUBSAT

Bleif, Jörn-Hendrik

Dissertation, Fakultat V (Verkehrs- und Maschinensysteme) , Technische Universitat Berlin, 2004

Flight Experiences with DLR-TUBSAT

Stephan Roemer, Udo Renner

Acta Astronautica, Volume 52, Number 9, May 2003, pp. 733-737(5)

Interaktive Lageregelung zur Erdbeobachtung mit Mikrosatelliten am Beispiel DLR-TUBSAT

Stefan Schulz

Dissertation, Fachbereich 10 - Verkehrswesen und Angewandte Mechanik - Technischen Universität Berlin, 2001

DLR-TUBSAT: A Microsatellite for Interactive Earth Observation

Stefan Schulz, Udo Renner

Small Satellite Systems and Services 5th international symposium, La Baule, France 2000

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