Baseline Initialization Methods
Initialization is the process in which a receiver initially acquires its location and stores almanac data.
Known Point Initialization
Known Point Initialization (KPI) is the fastest and most reliable of all the initialization types. Both the base and roving receivers are set up on known or previously surveyed points, and the rover stays stationary for at least 30 seconds on its point. The baseline processor uses the known coordinates as additional information during initialization.
Postprocessed On-the-Fly initialization
On-The-Fly (OTF) initialization requires maintaining a lock on five satellites. The base receiver is placed on a known point and collects GNSS measurements. The rover collects measurements for this same time period, but the rover is not required to remain stationary on any point for any specified length of time. The baseline processor can use this data for initialization, even if the rover was moving during the entire time the data was collected.
Static initialization
Static initialization requires the base receiver to occupy a known reference point while the rover occupies any other point. The rover stays stationary on its point for the amount of time required for a normal FastStatic occupation. The occupation time will vary according to the number of satellites available and the type of receivers used in the survey. Consider FastStatic occupation time recommendations and your own experience, based on satellite availability and local conditions.
Reoccupation initialization
Reoccupation initialization is similar to Known Point Initialization, except that the point occupied by the rover is not known ahead of time. Instead the rover occupies a point that was previously occupied in the same kinematic field session. An assumption is made that the baseline processor will be able to solve the baseline from the base to the rover for the previous occupation of that same point. If this assumption proves true, then that previous baseline solution can be used later for initialization. The rover should remain stationary over the previously occupied point for at least 30 seconds.
Known Distance Initialization (Initializer Bar)
Known Distance Initialization (KDI) is used during kinematic surveys and must be selected in the field software. Refer to your field software documentation for details.
