tsc_EcefDeltasObservation

This a subclass of tsc_PointObservation, and contains a tsc_EcefDeltas coordinate.  This type of observation is used to store measurements taken by a vector-storing RTK GNSS survey.

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

Each GNSS observation requires context information - the environment and the precisions - which are supplied by the measurement code and can be sourced from the database or the tsc_GnssModes object.  This context information must be set on the observation object to ensure that the point is stored correctly.

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).