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Mission S-NET

S-band Inter-Satellite Communication with Nanosatellites

On February 1st 2018, one of the first nanosatellite networks ever was successfully deployed in space.

TUBiX10 Platform

The platform and its main components were developed by TU Berlin during the S-NET project. Main features of the platform are:

– 10 kg class

– single point of failure tolerance on component level

– 3-axis attitude control

– optimmized for distributed missions

S-Band Radio

The S-band transceiver SLINK was developed in cooperation with the company IQ wireless. The system works on S-band frequencies and uses modern transmission methods, such as adaptive coding and modulation schemes. The protocol enables network communication with several nodes. The following parameters make SLINK ideal for nanosatellite payload:

  • Data rates up to 126 kbps for crosslink
  • Distances up to 800 km
  • RF power of 0.5 W
  • Power consumption of 15 W in TX mode
  • Mass < 0.3 kg with case
  • Downlink (up to 3.4 Mbps) and uplink (up to 252 kbps)

Orbit Deployment

The newly developed deployment system for nanosatellites was produced jointly with the company Astro- und Feinwerktechnik Adlershof. The lifetime of the mission depends highly on the orbit injection accuracy of the nanosatellites from the rocket upper stage. Hence, the system ensures most precise deployment during separation.

Launch

The launch took place on February 1st 2018 from cosmodrome Vostochny (RUS), supported by Exo Launch. 

Formation Flight

The relative distance control was realized via utilizing differential drag between the satellites by changing the attitude w.r.t to flight direction.

The respective TLEs are: 43186, 43187, 43188, 43189.

ISL Experiments

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Publications

  • 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). IN REVIEW, pp. 397–410. ISSN: 1868-2502. DOI: 10.1007/s12567-020-00308-6.
  • 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.
  •  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.
  • 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.
  •  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, 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.
  • Zizung Yoon, Thomas Terzibaschian, and Christian Raschke. “Development and verification of the fault tolerant attitude control system of OOV-TET satellite”. In: 8th. International ESA Conference on Guidance, Navigation & Control Systems. 2011.