18.1ET.04 - NANOSAT X-BAND TT&C TRANSPONDER EM

Publication Date: 15-MAY-18

Program ref.: GSTP Element 1 Dev
Tender Type: C
Tender Status: INTENDED
Price Range: > 500 KEURO
Budget Ref.: E/0904-611 - GSTP Element 1 Dev
Proc. Prop.: DIPC
Establishment: ESTEC
Responsible: Ginesi, Alberto
Products: Satellites & Probes / RF / Microwave Communication (Platform and Payloads) / Transmitters / X-band, S-Band, Ka band, ¿ / Near Earth application, Deep space application, ... / Platform vs Payload
Techology Domains: RF Systems, Payloads and Technologies / TT&C and Payload Data Modulator (PDM) Systems/Subsystems / Deep-Space Transponders RF Systems, Payloads and Technologies / TT&C and Payload Data Modulator (PDM) Systems/Subsystems / Near-Earth Transponders
Industrial Policy Measure: N/A - Not apply

Historically for TTC functions most of the cubesats relied on amateur bands (generally VHF/UHF). This is often the case but for LEO missions the transition to ITU S-Band for space research, space operations and earth explorationsatellite services (EES) is underway. However, nothing is currently in place in Europe to support missions at bigger distances, where X-Band is a need and where more sensitive receivers and more powerful HPA are required. Compliance with standard ESTRAK stations is also necessary (due to the unique performance) and therefore implementation of the air interface as per ECSS-E-ST-50 series is a basic condition: this is not a common standard for cubesat/microsatellite missions and very limited/partial implementations exists as of today. For LEO, GNSS receiver or simply TLE (two-line element) datasets can ensure orbit determination, therefore integrated Doppler and ranging function (either Tone, Code or PN DDOR) have never been implemented for such class of mission. This can serve also RadioScience purposes. In addition, the architecture, either at transponder and subsystem level, must be specially designed in order to achieve the extreme miniaturization requested and at the same time improving the performance. As an examples different frequency plans could be considered andtraded-off. Even though the relevant applicable standards for the air interface are not new, a dedicated and completely new integrated transponder and subsystem have to be developed. Major requirements for the subsystem are the following: Target mass: less than 1.5kg(X/X) for the whole subsystem (antenna excluded). Target power: more than 4W (RX mode). RF power out (TX mode) up to 15W at antenna port. In the frame of this activity the following tasks shall be performed: Architecture design at subsystem level with definition of main building blocks Transponder architecture definition preliminary design with scalability and modularity, Transponder detailed design, Develop/build EM modules with technology allowing path to fly, developing also a roadmap for the final qualification Integration and testing of the overall EM model. NOTE: THIS ACTIVITY IS CURRENTLY IN THE GSTP WORK PLAN BUT WILL ONLY BE IMPLEMENTED AFTER CONFIRMATION OF FINANCIAL SUPPORT FROM DELEGATIONS. AT THAT TIME A PLANNED QUARTER FOR TENDER ISSUE WILL BE CONFIRMED AND BIDDERS WILL BE ABLE TO EXPRESS THEIR INTEREST IN THE ACTIVITY

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