Support OD measurements of only range or only Doppler
Currently, StdMeasurement will compute both the range and range rate at once. However, in practice, we don't have both at once. In fact, either may be averaged out over several times.
Currently, StdMeasurement will compute both the range and range rate at once. However, in practice, we don't have both at once. In fact, either may be averaged out over several times.