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S-Net

S-Net – S-Band Network for Cooperative Nanosatellites
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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. TU Berlin developed an S band transceiver (SLink) with 100 kbps crosslink and 1 Mbps downlink capability suitable for accommodation in nanosatellites.

Currently TU Berlin is developing a mission of four nanosatellites to verify the SLink payload and demonstrate intersatellite communication on a sophisticated level. An increasing numbers of communication entities participating in the network relates to a larger test bed for algorithm and verification. However for a nanosatellite based demonstration mission, four satellites present the best cost-benefit-ratio. Four entities enable six independent communication links while three satellites only make three links possible. Furthermore a multi-hop communication can only be realized with a number of at least four nodes.

S-NET
Parameter
Value
Mission Objectives
S-band inter satellite communication with nanosatellites
Number of Satellites
4
Orbit Height
< 650 km circular
Launch Date
Q4 2017 (tbc)
Design Lifetime
1 year
Mass
< 8.5 kg
Volume
240 x 240 x 240 mm³
Communication
UHF (satellite bus)
S-band (payload)
Attitude Control
Thre axis stabilization using MEMS sensors and magnetic torquers (momentum wheel optional)
Payload
S-band transceiver (SLINK) for ISL and up/downlink Laser reflector for high precision measurement Optical camera

Different network topologies are to be simulated in an orbital experiment with four nanosatellites. Therefore all satellites are placed in the same orbital plane. Despite the fact that the orbital configuration of S-Net cannot be changed after launch, the network topologies can be reproduced, albeit to a limited extent, by the software. The main network parameters such as data throughput and system load will be measured and logged by the S-Net payload data handling system and analyzed on ground.

Publications

Binder, Matthias; Yoon, Zizung; Briess, Klaus (2017). Attitude Determination with Failure Tolerant Sensor Arrays Suitable for Nanosatellites. 11th IAA Symposium on Small Satellites for Earth Observation


Frese, Walter; Briess, Klaus; Yoon, Zizung; Voigt, Siegfried (2017). Inter-satellite Communication with Nanosatellites using Adaptive Coding and Modulation. 5. Nationale Konferenz "Satellitenkommunikation in Deutschland"


Kirchner, Georg; Grunwaldt, Ludwig; Neubert, Reinhard; Koidl, Franz; Barschke, Merlin; Yoon, Zizung and Fiedler, Hauke (2013). Laser Ranging to Nano-Satellites in LEO Orbits: Plans, Issues, Simulations. presented at the 18th International Workshop on Laser Ranging


Barschke, Merlin F.; Yoon, Zizung and Brieß, Klaus (2013). TUBiX - The TU Berlin Innovative Next Generation Nanosatellite Bus. presented at the 64th International Astronautical Congress


Yoon, Zizung; Frese, Walter; Bukmaier, Alexander; Briess, Klaus (2013). System Design of an S-Band Network of Distributed Nanosatellites. CEAS Space Journal. Springer.


Barschke, Merlin F.; Yoon, Zizung; Baumann, Frank; Roemer, Stephan and Brieß, Klaus (2013). Nanosatellite activities at TU Berlin. Proceedings of the 2nd IAA Conference on University Satellites Missions, 69-76.


Yoon, Zizung; Frese, Walter; Bukmaier, Alexander; Briess, Klaus (2013). Mission Design of a S-Band Network of Cooperative Nanosatellites. International Workshop on Spacecraft Constellation and Formation Flight


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Press releases

  • DeSK cooperates with TU Berlin (11.10.2014) [more...]
  • Fast communication in space (15. Okt. 2012) [more...]

Zusatzinformationen / Extras

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Fachgebietsleitung

Prof. Dr.-Ing. Klaus Brieß
Tel. +49 30 314-21339
Room F 515

Grant No.:

50 YB 1225