ASME B89.4.19-2021 download Performance Evaluation of Laser-Based Spherical Coordinate Measurement Systems 1 ð21Þ SCOPE This Standard prescribes methods for the performance evaluation oflaser-based spherical coordinate measurement systems and provides a basis for performance comparisons among such systems. Definitions, environmental require- ments, and testmethods are included with emphasis on point-to-pointlength measurements. The specified testmethods are appropriate for the performance evaluation ofa...