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WG3K > ANS 31.03.24 17:00l 58 Lines 3970 Bytes #148 (0) @ AMSAT
BID : $ANS091.3
Read: GUEST
Subj: LoRa Digipeater Satellite from the U. S. Naval Academy Sched
Path: IW8PGT<IZ3LSV<I0OJJ<N6RME<CX2SA<N3HYM<WG3K
Sent: 240331/1355Z 2653@WG3K.#SMD.MD.USA.NOAM LinBPQ6.0.24
A 3U CubeSat. USNA-16 will provide UHF LoRa digipeater service to the
amateur radio service. Additionally, USNA-16 is a university-student
educational amateur radio mission. It will test a modular CubeSat design
and integration, as well as the efficacy of student-designed passive
magnetic pointing scheme for S-band operation. INCHsat payload will provide
UHF service to the amateur radio service. In addition INCHsat payload is a
university, student lead, educational amateur radio mission. It will test
custom designed and built components. Specifically it will test a custom
on-board computer, a custom radio (based off the OpenLST), a custom
motherboard, and a custom antenna deployment system. USNA-16 is a student
educational amateur radio mission. It will test a modular CubeSat design
and integration, as well as student-designed passive magnetic pointing
scheme. TT&C will occur at UHF (437.235 MHz, will be designated as UHF-TTC
in this document) and data downlinks will occur at 2.42GHz, both within the
amateur bands and both using the LoRa protocol. This will be the first
satellite launched by USNA using LoRa, with a potential future application
of APRS over LoRa. USNA-16 will also provide UHF LoRa digipeater service at
437.235 MHz to facilitate communication between amateur operators. INCHSat
is a student educational amateur radio mission built by students at the
University of Maryland, including the licensee, KC3VBJ. There are no paid
employees. The main goal is to enhance the aerospace skills of students in
a professional context. The students are learning about satellites and
space mission development and space communication by designing, building,
and launching a payload onboard a cube satellite. The payload consists of a
custom onboard computer, the radio, basic sensors, motherboard, and an
antenna deployment system. Communication with the payload will be performed
on the 437 MHz band from a ground station that will be constructed on the
UMD campus. This payload radio (437MHz) will be designated as UHF-PLD in
this document. USNA-16 will have a LoRa digipeater to serve the amateur
satellite community. LoRa offers low-power beyond-line-of-sight digital UHF
communications to the amateur community. Additionally, USNA-16 is a student
educational amateur service mission that communicates on amateur
frequencies. This will be the first satellite launched by USNA using the
LoRa protocol, with a potential future application of APRS over LoRa.
INCHsat payload is for the purpose of the training of UMD students in the
construction and development of aerospace components. It also tests the
components that we have developed on our own for future missions and
research purposes with no commercial benefit. INCHsat payload will have a
radio based on the open source OpenLST from Planet Labs to serve the
amateur satellite community. INCHsat payload is also a student educational
amateur service mission that will be communicating data obtained on amateur
frequencies. Pending the mission success the code and schematics of the
components used will be published as a cheaper alternative for amateur
teams looking to launch a cube satellite. Proposing these downlinks
UHF-TTC, 437.235 MHz, U/D, LoRa protocol @ 3.42 kbps data rate and on
S-band, 2.42 GHz, LoRa protocol @ 60 kbps data rate. UHF LoRa Digipeater:
437.235 MHz UHF-PLD : Frequency range is 430-445 MHz GSFK-2 @ 7416 baud
protocol. Planning an NG STP-29A launch from Vandenberg in Jan 2025 into a
500 km 60 degree inclination orbit with 10 CubeSats to orbit as part of the
OSP-4 program, with a total approximate mass of 400kg. Other university
CubeSats on STP-29A include AggieSat-6, Auris, MOCI and INCA-2. More info
at https://www.usna.edu/SSEL/Programs/index.php#nass
https://www.usna.edu/SSEL/Programs/index.php#nass
Coordination for downlinks on 437.235 MHz and 2420 MHz has been provided.
*[ANS thanks the U.S Naval Academy and the IARU for the above information]*
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