Seasonal variation in the solar spectrum

Conference · Tue Jan 01 00:00:00 EST 1980 · Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States)

OSTI ID:6428822

Spencer, D W; Healey, J

One minute data from 423 consecutive days is used to measure the seasonal solar spectrum variations. The parameters measured are horizontal global irradiation with WG7, OG1, RG2, RG8 and uv filters and direct normal radiation. An average ratio of each filtered horizontal global to the clear filter is computed for each day using a least square correlation. The correlation coefficient adds information about the variability of the ratio during the day. The variability of these ratios is much higher in winter than summer, for cloudy vs. sunny days, and humid days vs. dry days. The effects of optical air mass is inferred by the study of two very clear days. The effect of water vapor is inferred from the summer relative increase in the OG1-RG2 band. The uv radiation is much lower for the 1979-80 winter than the 1978-79 winter.

• Research Organization: State Univ. of New York, Albany
• OSTI ID: 6428822
• Report Number(s): CONF-800604-P3
• Journal Information: Proc. Annu. Meet. - Am. Sect. Int. Sol. Energy Soc.; (United States), Vol. 3.2; Conference: American section of the International Solar Energy Society conference, Phoenix, AZ, USA, 2 Jun 1980
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
SOLAR FLUX
ENERGY SPECTRA
CLOUD COVER
DAILY VARIATIONS
DATA ANALYSIS
EXPERIMENTAL DATA
GRAPHS
MEASURING METHODS
NEW YORK
OPTICAL FILTERS
PYRANOMETERS
PYRHELIOMETERS
RADIOMETERS
SEASONAL VARIATIONS
DATA
EQUIPMENT
FILTERS
INFORMATION
MEASURING INSTRUMENTS
MID-ATLANTIC REGION
NORTH AMERICA
NUMERICAL DATA
RADIATION DETECTORS
SOLAR EQUIPMENT
SPECTRA
TELESCOPES
USA
VARIATIONS
140100* - Solar Energy- Resources & Availability