IARU Amateur Satellite Frequency Coordination

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DORA Updated: 12 Sep 2023   Responsible Operator Daniel Jacobs KE7DHQ
Supporting Organisation Arizona State University  
Contact Person dcjacob2@asu.edu.nospam  
Headline Details: A 3U CubeSat mission. DORA (Deployable Optical Receiver Aperture CubeSat) is a testbed for communications technology and radio science of interest to amateur radio operators. The satellite makes use of and improves on an open source UHF satellite radio design, OpenLST. The radio includes an experimental amateur packet service available to amateur operators using gnu radio. This service will operate as a digipeater, forwarding received packets as well as a limited store and forward capability. The service will be available to all amateurs worldwide, subject to power and operational conditions. The satellite hosts two radio spectrometers operating in the VHF band. The radio spectrometers will map interference in 50 to 150 MHz, to create a global map of interference signal strength. This band contains the 2m amateur band as well as several other bands of interest. Amateur operators can use the spectrometer output to test their signal strength and compare against other operators. This mission also will characterize the levels of background light at LEO that are due to cities. This information will be of interest to amateur astronomers. Another mission goal is to advance the state of the art of wide-field laser receiver technology by test flying a sensitive solid state photon detector. The mission contributes to the advancement of amateur satellite service in the following ways: Train and certify students in use of amateur radio. Encourage the radio arts in a university aerospace program. Seven students have gotten amateur licenses in the program. Development of the radio and ground station operations is being done in partnership with the ASU amateur radio club and local amateurs. Develop, test and publish an open source UHF satellite radio design which can be used freely by other amateur developers, and Map interference in the 50 to 150 MHz, including 2m amateur band, to create a global map of band occupancy. Amateur operators around the globe will be able to exploit the information gained, by accessing the radio design and experimental results, and the signal strength map, from our website. We will publish the interpretation method for the telemetry, so that any amateur operator can capture data packets and view data sets regarding the interference map and the levels of background light. The project is also creating interest in the student team about amateur radio, and as a result a number of students are becoming licensed amateurs. Proposing a UHF downlink using 7.4 Kbaud 2FSK. Planning a Nanoracks deployment from the ISS early in 2024. More info from https://loco.lab.asu.edu/dora **A downlink 436.825 MHz has been coordinated**
Application Date: 26 Jul 2023   Freq coordination completed on 12 Sep 2023

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