# To switch to postprocessed infill

During periods when no base corrections are received, the Radio link down message flashes in the status line.

To continue surveying, tap and select Measure and then select Start PP infill. When postprocessing infill starts, raw data is logged at the rover. For successful baseline resolution, you must use postprocessed kinematic observation techniques.

Initialization cannot be transferred between the RTK survey and the PP infill survey. Initialize the PP infill survey like any other postprocessed kinematic survey. In a postprocessed survey, only rely on the On the fly (automatic) initialization if you are certain that the receiver will observe at least 5 satellites without interruption for the next 15 minutes, or 6 satellites without interruption for the next 8 minutes. Otherwise, initialize on a known point.

When base corrections are received again, the Radio link up message appears in the status line. This message also shows the initialization mode of the RTK survey.

To stop data logging at the rover, tap and select Measure and then select Stop PP infill. Real‑time measurements are resumed.

When postprocessed infill is started IMU tilt compensation is disabled, and then re-enabled when RTK is resumed.