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Determination of the solar calibration constant for a sun-sky radiometer : proposal of an in-situ procedure
Campanelli, Monica
3270
Nakajima, Teruyuki
3271
Olivieri, Bruno
3272
451
OCIS codes: 010.1290; 010.1110
A new procedure is presented for determining in situ the solar calibration constant, i.e., the Sun-sky radiometer counts for a direct normal solar flux extrapolated to the top of the atmosphere. The method makes use of a modified version of the Langley plot based on the use of an inversion code of column-integrated aerosol size distribution, and it is ordinarily applied to calibrate Prede Sun-sky radiometers. To analyze how such an in situ method can work accurately, the technique has been applied to a five-month dataset obtained from measurements taken in Rome, Italy, by a Prede Sun-sky radiometer from 22 April to 5 November 2001. The precision of the in situ method has been estimated to within 1–2.5%, depending on the wavelength.
journal article
Optical Society of America
2004-01-20
application/pdf
Applied optics
3
43
651
659
AA00543409
00036935
https://repository.dl.itc.u-tokyo.ac.jp/record/849/files/Nakajima2004OSA_H24P89.pdf
eng
info:doi/10.1364/AO.43.000651
http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-43-3-651
© 2004 Optical Society of America