The Viterbi algorithm is the same as the binary case with one main difference: The survivor sequences include the uncoded bits, which are decided at each trellis stage when selecting one of two parallel branches with the largest correlation metric.
Presently, only 8-PSK modulation is considered. Extensions to Higher-Order modulations can be implemented following a similar procedure.
computes the gravitational acceleration vector at a specified
％ ECF location using the JGM2 gravitational ellipsoid only.
％ Higher-Order gravity terms (the "gravity anomaly") are
％ ingnored. Only the pure ellipsoid is used.
