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WG3K > ANS 30.04.24 04:01l 36 Lines 1955 Bytes #168 (0) @ AMSAT
BID : $ANS119.3
Read: GUEST
Subj: Robusta-3A With Store & Forward Repeater Scheduled for Launc
Path: IW8PGT<IZ3LSV<DB0ERF<DK0WUE<DK0WUE<N2NOV<K7EK<W0ARP<N3HYM<KA3VSP<
WG3K
Sent: 240429/2058Z 3727@WG3K.#SMD.MD.USA.NOAM LinBPQ6.0.24
Robusta-3A is a 3U CubeSat with multiple mission
1) Amateur: Store & forward repeater, refer to 5.5 paragraph for more
details.
2) Educational: No less than 300 students participated in the development
of the platform. As part of their training, a module is allocated to the
initiation to amateur radio. In addition, we pass the license to around ten
students each year with the ANFR (French administration) and 3 new
operators at CSUM.
3) Technical validation mission: An S-band transmitter is on board
operating in commercial band for test purposes. This payload will not be
controlled by the amateur radio band.
The HAM radio messaging system provides a message-exchanging service
between amateur radio users using Robusta satellite missions as relays. The
main purpose of the system is to enable HAM radio operators to send and
receive messages from anywhere in the world without having a direct
(end-to-end) connection between them. The messaging system uses a method
called ‘store and forwardâ€Ö to provide this service. Messages are
transported to the relay station (satellite) by a radio link, and from one
geographical location to another, by the satellite orbital movement. A user
sends a message to the satellite during a pass and the message is stored in
the satelliteâ€Ös memory. The satellite then moves on its orbit, making the
stored message available for other HAM radio operators. Users can request
messages to the satellite which, in turn will check if there are any stored
messages available for that particular operator. Finally, the message is
transmitted and it arrives at its destination
A UHF downlink using 9k6 GMSK with AX25 is proposed. Launch is planned on
the Ariane 6 maiden flight from Kourou, French Guiana into a 580 km
circular 96 degree orbit together with GRBBEta and ISTSAT. More info at
https://csum.umontpellier.fr/en/nanosatellites-projects-our-3u-projects/
*[ANS thanks the IARU for the above information
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