PDS Update

Maintain Accuracy.

Normally done after 6 to 8 km of travel.

PDS output compared to known survey control point (SCP).

Calibration constants are not changed.

P 4-12

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Title: PDS Update

Dialogue: There are different accuracies associated with the SCPs for MLRS and required accuracies for firing. Although the SCP accuracy requirements may seem restrictive, they are based on the accuracy of the launcher SRP/PDS and the assumption that the launcher will not move no more than 6 to 8 km between SCPs before conducting an update. The SCP accuracy requirements ensures that after the launcher moves 6 to 8 km the SRP/PDS will retain an accuracy within the prescribed MLRS firing point requirement.