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S-Net

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

News

  • 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.

S-NET
Parameter
Value
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
Mass
8.72 kg 
Volume
240 x 240 x 240 mm³
Communication
UHF (TM/TC), S-band (UL/DL/ISL experiment)
Attitude Control
3-axis control w. MEMS sensors, magnetorquers and reaction wheels
Payload
S-band transceiver (SLINK) for ISL and up/downlink Laser reflector for high precision measurement

Videos

Short docu about mission TV1:

The mission (image video):

Encapsulation of Fregat upper stage at cosmodrome Vostochny:

Report (successful launch and first contact):

Publications

System Design of an S-Band Network of Distributed Nanosatellites
Citation key Yoon.2013.DLRK.SNET
Author Yoon, Zizung; Frese, Walter; Bukmaier, Alexander; Briess, Klaus
Year 2013
ISSN 1868-2502
DOI 10.1007/s12567-013-0058-1
Journal CEAS Space Journal
Volume 6
Number 1
Month March
Publisher Springer
Abstract The paper presents the mission and system design of the S-Net mission, which consists of four nanosatellites to demonstrate intersatellite communication in S-band. The goal is to demonstrate multipoint to multipoint communication with high data rates and optimized communication protocols to push further the technological boundary of nanosatellites. To overcome the cross-communication limitations of a nanosatellite, the Technical University of Berlin developed an S-band (2.0-2.3 GHz) transceiver with 100 kbps crosslink and 1 Mbps downlink capability suitable for nanosatellites. Modern transmission techniques such as Adaptive Modulation and Coding (AMC) with Turbo and convolutional coding and up to APSK8 were implemented and tested on ground. The transceiver accommodates the physical layer and data link layer while the satellite controller is responsible for the network layer. Each nanosatellite will be equipped with the above mentioned S-band transceiver. Hence a mission analysis as well as the design overview of the space segment and ground segment will be described. Different network architecture and corresponding routing algorithm will be demonstrated and verified within the mission.
Link to original publication Download Bibtex entry

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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...]

Zusatzinformationen / Extras

Quick Access:

Schnellnavigation zur Seite über Nummerneingabe

Auxiliary Functions

Fachgebietsleitung

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

Grant No.:

50 YB 1225