TU Berlin

Chair of Space TechnologyS-NET

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S-Net – S-Band Network for Cooperative Nanosatellites
Point of Contact


  • 2019.05.09: More results on IAA SSEO
  • 2019.02.01: One year in orbit. All satellites in best state! Relative distances great!
  • 2018.10.02: Flight results on IAC Bremen.
  • S-Band down- and uplink successful. 
  • Info for radio amateur: Mike Rupprecht
  • 2018.02.22: Intersatellite communication successful.
  • 2018.02.19: SLink has been activated. S-band downlink is next step.
  • 2018.02.07: TLEs: 43186, 43187, 43188, 43189. Relative distance stable.
  • 2018.02.01: Ground contact w. all four S-NET was established. 
  • 2018.02.01: Successful launch of four S-NET satellites with Soyuz/Fregat.

The Mission

The objective of the S-Net mission is to investigate and demonstrate the inter-satellite communication technology within a distributed an autonomously operating nanosatellite network. As space born systems have become an essential element in facing global challenges such as climate change, disaster management and maritime systems monitoring, rapid response and low cost systems are in high demand.

A key technology to increase the operational efficiency of distributed satellite systems via formations or even autonomous swarms is the miniaturizing of intersatellite communication technology. In cooperation with IQ wireless GmbH, TU Berlin developed an S-band transceiver (SLink) with 100 kbps crosslink and 1 Mbps downlink capability suitable for accommodation in nanosatellites.

Mission Objectives
S-band inter satellite communication with nanosatellites
Satellite number
4 (Norad ID: 43186-43189)
Orbit Height
580 km SSO
Launch Date
2018.02.01 02:07 UTC
Design Lifetime
1 year
8.72 kg 
240 x 240 x 240 mm³
UHF (TM/TC), S-band (UL/DL/ISL experiment)
Attitude Control
3-axis control w. MEMS sensors, magnetorquers and reaction wheels
S-band transceiver (SLINK) for ISL and up/downlink Laser reflector for high precision measurement


Short docu about mission TV1:

The mission (image video):

Encapsulation of Fregat upper stage at cosmodrome Vostochny:

Report (successful launch and first contact):


Laser ranging to nano-satellites in LEO orbits: Plans, issues, simulations
Citation key kirchner.2013.IWLR.Laser
Author Kirchner, Georg; Grunwaldt, Ludwig; Neubert, Reinhard; Koidl, Franz; Barschke, Merlin; Yoon, Zizung and Fiedler, Hauke
Title of Book Proceedings of the 18th International Workshop on Laser Ranging
Year 2013
Address Fujiyoshida, Japan
Month November
Abstract Several small satellites in the class of pico- and nano-satellites will be equipped with multiple small corner cubes: OPS-SAT (ESA), S-Net and TechnoSat (8 kg resp. 15 kg; Technical University Berlin). The size of these satellites is in the range of 10x10x30 cm, up to about 40 x 40 x 30 cm; the planned circular orbits are in the 500 - 600 km range. Commercially available 0.5” corner cubes will be used for SLR; a single corner cube of this size will be sufficient for SLR to the planned LEO orbits. Placing several of these corner cubes on each side of the satellites will not only allow for standard SLR and POD, but also for an independent attitude determination with < 1° accuracy, even after the end of the satellites lifetime, or in case of problems or satellite failure.
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Press releases

  • Ingenieurskunst aus Berlin-Charlottenburg im All (01.02.2018) [mehr...]
  • DeSK cooperates with TU Berlin (11.10.2014) [more...]
  • Fast communication in space (15. Okt. 2012) [more...]


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