Development of New Models for the Estimation of Hourly Components of Solar Radiation: Tests, Comparisons, and Application for the Generation of a Solar Database in Morocco

Table 2

Characteristics of measuring instruments.

Meteorological variables	Instruments	Accuracy
Global solar radiation	The Kipp & Zonen brand SP-Lite pyranometer	2%
Diffuse solar radiation	The Kipp & Zonen brand SP-Lite pyranometer with a sun visor strip	2%
Direct solar radiation	Pyrheliometer type Eppley model NIP 31820 E6	0.5%
Total solar ultraviolet radiation	Total Ultraviolet type Eppley	2%
Infrared solar radiation	Infrared radiometer type Eppley	2%
Photosynthetically active radiation (PAR)	Quantum sensor SKP215, type Campbell Scientific	0.5%
Wind speed and direction	Anemometer with a wind vane model wind monitor 05103, type Campbell Scientific	0.25%
Precipitation	Rain Gauge ARG100, manufactured by Environmental Measurements for Campbell Scientific	4%