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N3SS (Nanosat 3U pour la Surveillance du Spectre) is an in-orbit demonstrator developed to perform planetary surveillance of the civilian radiofrequency spectrum in the L and S bands and to analyze sources of jamming. Its objective is also to provide in-orbit validation of the very small, very low-mass satellite design developed using the “design to cost” approach.

The flight segment is based on a 3U CubeSat with strong heritage from the EyeSat platform. It is equipped with a miniaturized prototype payload instrument. CNES is responsible for the system and satellite development and also in charge of the in-flight operations of the satellite. U-Space is the prime contractor for the platform development and the satellite AIT/AIV.

Nation: France
Type / Application: Technology
Operator: CNES
Contractors: CNES, U-Space
Configuration: CubeSat (3U)
Power: 4 deployable fixed solar arrays, batteries
Lifetime: 1 year
Satellite COSPAR Date LS Launch Vehicle Remarks
N3SS (NESS) 2023-155E 09.10.2023 Ko ELV Vega with THEOS 2, TRITON, PROBA V-CC, CSC 1, 2, MACSAT, ANSER L, F1, F2, ESTCube 2, N3SS, PRETTY


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