Many people only think about tripods in relation to photography, and these helpful stands do help professional photographers and shutterbugs keep cameras stable in order to produce high-quality photographic images. However, this is just one type of tripod. There are several varieties used by many different professions.
Calibration, in basic terms, is simply a comparison between two measurements. One of the measurements has a known correctness and the other measurement is that of the device you are testing. Calibration is needed to ensure that the known correctness measurement matches that of the test subject.