tsc_TiltedEcefDeltasObservation

This a subclass of tsc_TiltedGnssObservation, and contains a tsc_EcefDeltas coordinate.  This type of observation is used to store measurements taken by a explicit tilted pole measurement in a vector-storing GNSS survey.

Such an observation can only be appended to the database while a current survey is running.

Note that when the survey style has been set to store observations as positions then your ECEFDeltas observations will be internally stored as an ECEF coordinates.  Should this fail for any reason the observation will not be stored (e.g. no base coordinate is available to generate the absolute position).