Due to the recent failure of the Ericsson VHF radio
The packet system uses the same protocol as the VHF system. Operators using the system should adjust for increased Doppler shift at UHF.
The ARISS team is currently working on Kenwood TM-D710GA 
Source:ARRL
Review
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Antenna
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Equipment
The DUC/DDC HF/VHF SunSDR2 transceiver
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