It seems that the K6 has firmware that can automatically correct errors. The OPENGD77 firmware also supports automatic Doppler correction. However, their satellite orbit data is not updated in real-time and requires periodic updates to the ephemeris.
During operation, five sets of data can be written (which can be referenced from the amateur satellite frequency table), corresponding to the uplink and downlink frequencies that take into account the Doppler effect for each stage: ascent, middle orbit, and descent. The Doppler effect in the V-band is not as pronounced as in the U-band. Furthermore, if it is impossible to precisely match the frequencies due to limitations of the handheld transceiver, the nearest frequency can be written.
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