IARU Amateur Satellite Frequency Coordination

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MARIA-G (HADES-F) Updated: 11 Mar 2024   Responsible Operator Juan Antonio Fernandez EA4CYQ
Supporting Organisation AMSAT-EA  
Contact Person ea4cyq at amsat-ea dot org  
Headline Details: A 1.5u Pocketqube. MARIA-G will offer licensed radio-amateur around the world the opportunity to relay FM voice and AX.25 / APRS 300 / 1200 bps communications. The satellite will also transmit telemetry with its status and voice and CW messages. This all will be achieved by implementing a SDR based FM and FSK repeater. The FM / FSK repeater will be available all time and opened by squelch level without the need of a subtone. Main mission for MARIA-G is to be a FM repeater but it will also include a simple guess game being implemented by students at Maria Guerrero High School in Collado Villalba - Madrid (Spain). The satellite will send a clue each week in CW so radioamateurs will have to solve the mystery by having all the clues. As there is a small empty space available, it has been offered to Fraunhofer-Gesellschaft research organization (Germany). This organization has developed a proof of concept for transmission of a TS-UNB waveform from a low Earth orbit. This experiment will be delivered to AMSAT EA for integration and will be operated by AMSAT-EA, being all its data public and open. A small experiment, developed by Fraunhofer-Gesellschaft research organization (Germany) will also fly on the satellite. It consists in a proof of concept for transmission of a TS-UNB waveform from a low Earth orbit. Therefore, it will transmit a TS-UNB message according to the ETSI standard ETSI-TS-103-357. It is intended solely as a research and development project with no commercial intent. A: ITU modulation classification would be as follows: 100K W2DWW but the bandwidth will be narrowed. The operation of this experiment will be managed by AMSAT-EA. Launch is expected for 2024 in RFA mission, managed by DLR and ESA. Launch site: UK This satellite is part of Erminaz mission, a join effort by AMSAT-DL, AMSAT-EA and LibreSpace Foundation. Proposing a UHF downlink for FM voice, FSK and AX25 APRS data up to 1k2 bps, and a VHF uplink for the transponder. Planning a DLR/ESA launch from the UK in July 2024 into 500/600 km polar orbit - all TBC. More info at https://www.amsat-ea.org/ **A downlink on 436.666 MHz has been coordinated**
Application Date: 17 Feb 2024   Freq coordination completed on 11 Mar 2024

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