Space Technology


Project Facts

Project NameS-Band communication network with distributed nano satellites
Project Duration11/2012 – 12/2019
Funding number50 YB 1225

Project Description


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 ObjectivesS-band inter satellite communication with nanosatellites
Satellite number4 (Norad ID: 43186-43189)
Orbit Height580 km SSO
Launch Date2018.02.01 02:07 UTC
Design Lifetime1 year
Mass8.72 kg 


Volume240 x 240 x 240 mm³
CommunicationUHF (TM/TC), S-band (UL/DL/ISL experiment)
Attitude Control3-axis control w. MEMS sensors, magnetorquers and reaction wheels
PayloadS-band transceiver (SLINK) for ISL and up/downlink Laser reflector for high precision measurement

Team Member

At the TU Berlin, the following members of the team are employed on the project:



Short docu about mission TV1:

The mission (image video):

Encapsulation of Fregat upper stage at cosmodrome Vostochny:

Report (successful launch and first contact):

Funding & Acknowledge

  • S-NET was supported by German Aerospace Center (DLR) Space Agency (Raumfahrtmanagement) with funds from the German Federal Ministry of Economic Affairs and Technology (BMWT), Grant No: 50 YB 1225



Peer Reviewed Journals:

Zizung Yoon, Walter Frese, and Enrico Stoll. “In-Orbit Performance of the Narrowband Intersatellite Mission S-NET”. In: 2022 IEEE Space Hardware and Radio Conference (SHaRC) (2022), pp. 1–4. DOI: 10.1109/SHaRC53093.2022.9720032.

Zizung Yoon, Yeerang Lim, Sebastian Grau, Walter Frese, and Manuel A. Garcia. “Orbit deployment and drag control strategy for formation flight while minimizing collision probability and drift”. In: CEAS Space Journal 12 (2020), pp. 397–410. ISSN: 1868-2502. DOI: 10.1007/s12567-020-00308-6.

Zizung Yoon, Walter Frese, and Klaus Briess. “Design and Implementation of a Narrow-Band Intersatellite Network with Limited Onboard Resources for IoT”. In: Sensors 19.19 (Sept. 2019), p. 4212. DOI: 10.3390/s19194212.

Zizung Yoon, Walter Frese, Alexander Bukmaier, and Klaus Briess. “System Design of an S-Band Network of Distributed Nanosatellites”. In: CEAS Space Journal 6.1 (Mar. 2013). DOI: 10.1007/ s12567-013-0058-1.

In Proceedings

Walter Frese, Udo Renner, Klaus Briess, and Zizung Yoon. “Design and On-Orbit Experience of Reaction Wheels for Small Satellites”. In: 33rd AIAA/USU Small satellites. 2019.

Walter Frese, Zizung Yoon, and Klaus Briess. “S-Net first year in orbit: verification of a nanosatellite network in s band”. In: 12th IAA Symposium on small satellites for Earth observation. Ed. By Sandau. Vol. 12. 2019.

Walter Frese, Zizung Yoon, Huu Quan Vu, and Klaus Briess. “TUBiX-10 -Design and Flight Experience of a Nanosatellite Bus for Distributed Missions”. In: 70th International Astronautical Congress. 2019.

Yeerang Lim, Zizung Yoon, and Walter Frese. “in-orbit differential drag control experiment on nanosatellite cluster: analysis and flight results”. In: 12th IAA Symposium on small satellites for Earth observation. Ed. by Sandau. Vol. 12. 2019.

Zizung Yoon, Walter Frese, and Klaus Briess. “novel nanosatellite cluster deployment strategy by precise orbit insertion – design, verification and flight results”. In: 12th IAA Symposium on small satellites for Earth observation. Ed. by Sandau. Vol. 12. 2019.

Walter Frese, Zizung Yoon, and Klaus Briess. “communication network in LEO: in-orbit verification of intersatellite link by nanosatellite cluster S-Net”. In: Proceedings of the International Astronautical Congress (IAC). 2018.

Merlin Barschke, Zizung Yoon, and Klaus Briess. “TUBiX - The TU Berlin Innovative Next Generation Nanosatellite Bus”. In: 64th International Astronautical Congress. Sept. 2013.

Walter Frese, Klaus Briess, and Zizung Yoon. “A Network Architecture for Inter-satellite Communication of Distributed Nano Spacecraft Systems”. In: Deutscher Luft- und Raumfahrtkongress (German Aerospace Congress). Bonn: DGLR e.V., 2011, pp. 1451–1461.