IARU Amateur Satellite Frequency Coordination

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Magnaro-II Updated: 20 Jan 2024   Responsible Operator Hidenori Yoshikawa JP3OUJ
Supporting Organisation Nagoya University  
Contact Person yoshikawa.hidenori.r0@s.mail.nagoya-u.ac.jp.nospam  
Headline Details: A 2U and 1U CubeSat mission 1. Extended communication distance by relay through two satellites in formation flight Communication message relay by two satellites in formation flying (Mission 2) allows extended range for various experiments of long-range communication by amateur radio (long-range repeater). Two satellites, MAGNARO-II - Tigris and MAGNARO-II - Piscis, share the information of housekeeping data in each satellite and the messages to be relayed. On-board Communication systems for communication with ground station are also used for inter-satellite communication. MAGNAROMAGNARO-II - Tigris-A will receive AX.25 packets set in UNPROTO with MAGNARO- II - Tigris and MAGNARO-II - Piscis as the path. MAGNARO-II - Tigris satellite receives packets transmitted from ground station in even minutes and MMAGNARO-II - Piscis satellite only transmits in odd minutes in order to minimize the interference between uplink and downlink. Overview of the mission is explained in the supplementary material (Attachment 1). The details of the protocol will be published together with the mission status in the official website (official website: http://nanosat.nuae.nagoya-u.ac.jp/ [TBC]). 2. Formation flight Propellant-less formation flight using high-spin deployment and differential atmospheric drag. In this formation flight, two satellites (MAGNARO-II - Tigris and MAGNARO-II - Piscis) are initially connected magnetically, and separated to make a formation in-orbit for armature Inter-satellite communication. The satellites relative orbits are actively controlled with atmospheric drag force, and the relative attitude is actively controlled with magnetic torque by MTQ. In the formation flight, the orbit is determined using GPS, and the attitude is determined using both magnetometer and Sun sensor. With these methods, nanosatellites can easily achieve formation flight and provide inter satellite communication capability. Key demonstration for energy efficient technology, which allows long-range communication for Mission 1. MAGNARO-II mission provides longer range amateur communication service than the range provided by a single satellite, which provides unique training and technical investigation opportunities. MAGNARO-II is a unique satellite with spin separation and capability of formation flying (formation range varied from 2km to 500km). The satellites in formation flight allow communication relay through inter-satellite link which extends communication range by thousands of kilometers. This feature allows the amateur community to test communication relay technology on nanosatellite platforms. Any amateur operators can use MAGNARO-II - Tigris and MAGNARO-II - Piscis as repeaters by sending AX.25 packets in UNPROTO when this feature is enabled. Proposing a UHF downlink capable of CW 1k2 AFSK and 9k6 and 19k2 GMSK packet.Planning a launch from Uchinoura into a 540 km SSO together with KOSEN-2R, WASEDA-SAT-ZERO-II, FSI-SAT21, OrigamiSat-2, Mono-Nikko, Prelude and ARICA-2. More info from http://nanosat.nuae.nagoya- u.ac.jp/research_nanosat_en.html **Coordination has been provided for a downlink for Tigris on 145.850 MHz and for intersatellite links on 436.325 MHz and for a downlink on Piscis on 436.325 MHz and for intersatellite links on 145.850 MHz**
Application Date: 06 Dec 2023   Freq coordination completed on 15 Jan 2024

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