Comparison on Total Solar Irradiance

Project Description

Comparison to the conventional primary standard, the WRR, defined by the World Standard Group; the three NMIs NPL, PMOD/WRC and METAS are participating with a common instrument CSAR (Cryogenic Solar Absolute Radiometer).

Comparison done as part of the International Pyrheliometer Comparisons XII (IPC-XII), which is a WMO comparison.

Final Report 2019-09-23

The comparison has been completed and results are published in the KCDB.

Progress Report 2016-01-21

Measurements finished as planned, report in progress.

Photometry and Radiometry (PR)
Coordinating Institute
PMOD/WRC (Switzerland)
Further Partners