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Copyright 2004 Northrop Grumman Corporation

12

System Operational and Cross Checks

Each system has its own unique operational checks.

Systems are frequently compared to measurements made from other higher or comparable accuracy systems.

Test ranges are frequently measured and measurement uncertainty is calculated.

Reality checks are frequently made to machined parts.

Accuracy and scale are checked to calibrated invar and steel reference bars.  These are traceable to NIST.

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