Proposal Submitted to ESA for Geostationary Microwave Amateur Payload

A proposal has been submitted to the European Space Agency (ESA) by AMSAT-UK, the British Amateur Television Club (BATC), and AMSAT-NA, with input from members of the UK Microwave Group for a geostationary microwave amateur payload with planned coverage of at least part of North America. This proposal was submitted in response to a presentation at the AMSAT-UK Colloquium from Frank Zeppenfeldt, PD0AP, of ESA, who has secured €250,000 in funding to investigate the possibility of an amateur satellite or payload in geostationary orbit.

The proposal notes the desire for coverage of all ESA members and cooperating states, but that it is not possible for a satellite in geostationary orbit to cover the entirety of this territory, which ranges from Cyprus at approximately 34 degrees east to western Canada at approximately 141 degrees west and lays out example coverage from three slots: 5 degrees west, 30 degrees west, and 47 degrees west. In a later section, the proposal also discusses two non-geostationary orbit options that could provide the desired coverage: a tundra orbit and a high earth orbit just below the geostationary belt.

The amateur radio and educational payload proposed consists of two 5.6 GHz uplink and 10 GHz downlink transponders (Mode C/x) – one 250 kHz wide with 20 watts of output for narrowband modes such as SSB, CW, and narrowband digital modes and one 1 MHz wide with 20 watts of output for wideband modes, including amateur television. The transponder design would include an optional SDR block for signal regeneration. Additionally, a 24 GHz receiver would also function as a transponder uplink. The proposal also calls for a 47 or 74 GHz multimode beacon or additional downlink transmitter, an earth-pointing camera with a still image downlink as part of the telemetry or beacon for educational outreach, and a red or near-infrared laser experiment aimed towards Western Europe. All downlink signals would be phase coherent with timing by GPS reference or a chip-scale atomic clock.The full proposal text - https://www.amsat.org/wordpress/wp-content/uploads/2023/12/ESA-GEO-proposal-AMSAT-UK.pdf