IARU Amateur Satellite Frequency Coordination

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Arica-2 Updated: 29 Apr 2024   Responsible Operator Takanori Sakamoto JS1YLH
Supporting Organisation Aoyama Gakuin University  
Contact Person tsakamoto@phys.aoyama.ac.jp.nospma  
Headline Details: A 2U CubeSat. 1. The non-amateur mission goal of ARICA-2 is to demonstrate the real-time alert system of transient astronomical sources, such as gamma-ray bursts, using commercial satellite network services. As an extra success mission, we will collect the images of the earth, and hopefully, aurora by the Spresense’s camera utilizing machine learning capability of Spresense. 2. The amateur mission is to provide a "store and forward" capability for communication among amateurs. The alert and housekeeping data are also broadcast through the amateur CW transmitter. (Note: The commercial satellite network and the amateur network are isolated, and there is no interconnection between those two networks. ) ARICA-2 sends a relatively large amount of housekeeping data in a CW beacon. Furthermore, when ARICA-2 detects a transient astronomical object, the alert message sends through a CW beacon. The GMSK transceiver has a "store and forward" function so that amateurs worldwide enjoy satellite communication among amateurs. ARICA-2 uses Sony's Spresense, a low-cost and low-power consumption board, as the OBC, which will open a prospect to use in an amateur's small satellite. Proposing a UHF downlink using 20 wpm CW or 4k8 GMSK in AX25 format. Planning a JAXA launch from Uchinoura Space Centre during FY2024 into a 540km polar orbit. More info at http://sakamoto-agu.wikidot.com/arica2-en **More information has been requested from the group** ** A downlink on 436.830 MHz has been coordinated**
Application Date: 01 Feb 2024   Freq coordination completed on 29 Apr 2024

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