Use PACπ for the PAPI lights measurement and get a report to compare the actual results with the requirements specified in Appendix 2 of Annex 14, 5th edition July 2009, of ICAO.
Using a high resolution camera, a spectro-photometer and lux sensors, PACπ provides all necessary information related to the aiming angles, the transition, the chromaticity and the iso-candela diagram of the light beam.