NOTE!
1. Callsign 6 symbols and uppercase only.
For short callsigns such as A0AA type in '_A9AA_'.
2. Power range is [0, 3, 7, 10, 13, 17, 20, 23, 27, 30, 33, 37, 40, 43, 47, 50, 53, 57, 60], dBm
[W] = 100.1[dBm]-3 or [dBm] = 10(3+lg[W])
Calc 0.01 W via Google
3. First transmission begins when required GPS accuracy has been achieved after power up.
Countdown of interval begins after last transmission in sequence (last repeat).
E.g., interval = 20 min, repeat = 3, GPS accuracy achieved at 15:33:27 and remains.
Transmissions will start at 15:34:00, at 15:36:00, at 15:38:00, and next will start at 15:58:00, at 16:00:00, at 16:02:00.
If accuracy lowered before any transmission, the whole sequence is pends till GPS accuracy not get better.