Ground Stations and Radio License

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Presentation transcript:

Ground Stations and Radio License Charles Sommer October 22nd, 2019

AAReST RF System 2 bands: 2 radios: 3 antennas: 2 meters band, VHF, uplink: amateur band 70 centimeters band, UHF, downlink: amateur band 2 radios: One AstroDev Helium 100 Transceiver: amateur radio main TM/TC transceiver, GFSK, 19.2 kbps One AMSAT Linear Transponder with two radios: amateur radio transponder amateur radio secondary TM/TC transceiver, FSK/BPSK, 1.2 kbps 3 antennas: One VHF uplink antenna shared by Two UHF downlink antennas

Organizations ITU: International Telecommunications Union Coordinates all world-wide frequencies Allocates spectrum internationally FCC: Federal Communications Commission Regulates use of frequencies inside the US Issues licenses to operate US spacecraft IARU: International Amateur Radio Union Coordinates amateur frequencies allocations ARRL: American Radio Relay League Advocates to the FCC for amateurs AMSAT: Radio Amateur Satellite Corporation US entity that promotes amateur radio in space NOAA: National Oceanic and Atmospheric Administration Remote sensing authority 11/2/2019

Amateur vs. Experimental vs. Commercial AstroDev radio (bought in 2017) operates only on amateur bands Using amateur bands is great to get HKTM from all over the world ITU/IARU has said our request would be declined (May 2019) Too many uncoordinated CubeSats using amateur bands Bad practices (using amateur bands with no amateur purpose) Need to provide amateur radio service to the community Embedding an AMSAT Transponder 11/2/2019

Licenses Title 47 of Code of Federal Regulations: Part 97: Amateur Radio Service License Based on IARU coordination Need HAM license Part 5: Experimental Radio Service License For ground station and spacecraft 11/2/2019

Licensing process IARU AAReST Team FCC ITU 1 month+ 2 month+ 3 month+ Coordinates amateur frequencies assignments to avoid interference between satellites AAReST Team 1. Coordination paper 2. Freq. assignment 2 month+ 6. Grants licenses 3 month+ 3. FCC folder IARU consent / assignment NOAA approval letter (exemption?) Orbital debris assessment (NASA ODAR/DAS) ITU SpaceCap analysis ITU Cost Recovery Letter Mission details FCC Analyzes and accepts license requests Forward SpaceCap notice to ITU 4. Amateur and experimental license requests 5. SpaceCap notice ITU Keeps database of frequencies in use 11/2/2019

Ground Stations University of Surrey and IIST have working and nationally registered UHF/VHF Ground Stations Does it work @ 19.2 kbps? California State University Northridge has a working UHF/VHF Ground Station Would need to purchase 19.2 kbps radio + modem Is 19.2 kbps okay for our licenses? Would use Surrey’s Ground Station software in a network of GS 11/2/2019