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S-NET

Jump to: Mission Objectives, Mission Parameters, Additional Information

Mission Photos:
S-NET satellites

S-NET satellites (Courtesy of Technische Universität Berlin)

S-NET is 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.

Mission Objectives:
  • demonstration of multipoint intersatellite communication
  • verification of communication protocols
  • analysis of nanosatellite formation
  • demonstration of feasibilty of nanosatellite platform for communication purpose
Role of SLR:
  • The laser ranging should support the intersatellite communication experiments by determining the relative distance and correlating with the transceiver signal travel time.
  • Four satellites are deployed with interval of 10s from upper stage with a high precision mechanism. The deployment parameters (distribution of velocity and direction) shall be verified by analyzing SLR data.
  • The orbital drift behaviour of the constellation shall be analyzed in the early orbit insertion phase to propagate the formation drift.
Mission Parameters:
Satellite: SNET-1 SNET-2 SNET-3 SNET-4
Sponsor: Technische Universität Berlin Technische Universität Berlin Technische Universität Berlin Technische Universität Berlin
Expected Life: 1 year 1 year 1 year 1 year
Primary Applications: demonstration and verification demonstration and verification demonstration and verification demonstration and verification
Primary SLR Applications: intersatellite communication experiments intersatellite communication experiments intersatellite communication experiments intersatellite communication experiments
COSPAR ID: 1801410 1801407 1801408 1801409
SIC Code: 6204 6205 6206 6207
NORAD SSC Code: 43189 43186 43187 43188
Launch Date: February 1, 2018 February 1, 2018 February 1, 2018 February 1, 2018
RRA Diameter:        
RRA Shape: Planar Planar Planar Planar
Reflectors:        
Orbit: 600 km 600 km 600 km 600 km
Inclination: 97.6 - 97.9 degrees 97.6 - 97.9 degrees 97.6 - 97.9 degrees 97.6 - 97.9 degrees
Eccentricity: 0 0 0 0
Perigee: 600 km 600 km 600 km 600 km
Period: 96.7 min 96.7 min 96.7 min 96.7 min
Weight:        
Additional Information:

Web sites:

References:

  • Yoon, Zizung; Frese, Walter; Bukmaier, Alexander; Klaus Brieß (2014), "System design of an S-band network of distributed nanosatellites", CEAS Space Journal, 6, pp. 61–71, DOI: https://dx.doi.org/10.1007/s12567-013-0058-1
  • Yoon, Zizung; Lim, Yerrang; Grau, Sebastian; Frese, Walter and Manuel Garcia (2020), "Orbit deployment and drag control strategy for formation flight while minimizing collision probability and drift", CEAS Space Journal, 12, pp. 397–410, DOI: https://doi.org/10.1007/s12567-020-00308-6