Holographic interferometer measures radiation distribution

1970 ◽  
Vol 16 (11) ◽  
pp. 427
Keyword(s):  
Holographic Interferometer ◽  
Radiation Distribution

Contribution for Iron Vapor and Radiation Distribution Affected by Current Frequency of Pulsed Arc

2012 ◽  
Vol 132 (8) ◽  
pp. 718-727 ◽  
Author(s):  
Takuya Shimokura ◽  
Yusuke Mori ◽  
Toru Iwao ◽  
Motoshige Yumoto
Keyword(s):  
Current Frequency ◽  
Radiation Distribution ◽  
Iron Vapor ◽  
Pulsed Arc

Linear model for the scattered radiation distribution in digital chest radiographs

1996 ◽  
Author(s):  
Christiaan M. Fivez ◽  
Patrick Wambacq ◽  
Paul Suetens ◽  
Emile P. Schoeters
Keyword(s):  
Linear Model ◽  
Scattered Radiation ◽  
Chest Radiographs ◽  
Radiation Distribution ◽  
Digital Chest

Evolution of Radiation Distribution With RMP Assisted Detachment in LHD

2014 ◽  
Vol 42 (10) ◽  
pp. 2862-2863
Author(s):  
Byron Jay Peterson ◽  
Shwetang N. Pandya ◽  
Masahiro Kobayashi ◽  
Kiyofumi Mukai ◽  
Ryuichi Sano
Keyword(s):  
Radiation Distribution

scholarly journals Performance of the FMI cosine error correction method for the Brewer spectral UV measurements

2018 ◽  
Vol 11 (9) ◽  
pp. 5167-5180 ◽  
Author(s):  
Kaisa Lakkala ◽  
Antti Arola ◽  
Julian Gröbner ◽  
Sergio Fabian León-Luis ◽  
Alberto Redondas ◽  
...  
Keyword(s):  
Error Correction ◽  
Correction Method ◽  
Uv Spectra ◽  
Correction Coefficient ◽  
Finnish Meteorological Institute ◽  
Angular Response ◽  
Error Correction Method ◽  
Radiation Distribution ◽  
Rapid Changes ◽  
Relative Differences

Abstract. Non-ideal angular response of a spectroradiometer is a well-known error source of spectral UV measurements and for that reason instrument specific cosine error correction is applied. In this paper, the performance of the cosine error correction method of Brewer spectral UV measurements in use at the Finnish Meteorological Institute (FMI) is studied. Ideally, the correction depends on the actual sky radiation distribution, which can change even during one spectral scan due to rapid changes in cloudiness. The FMI method has been developed to take into account the changes in the ratio of direct to diffuse sky radiation and it derives a correction coefficient for each measured wavelength. Measurements of five Brewers were corrected for the cosine error and the results were compared to the reference travelling spectroradiometer (QASUME). Measurements were performed during the RBCC-E (Regional Brewer Calibration Center – Europe) X Campaign held at El Arenosillo, Huelva (37∘ N, 7∘ W), Spain, in 2015. In addition, results of site audits of FMI's Brewers in Sodankylä (67∘ N, 27∘ E) and Jokioinen (61∘ N, 24∘ E) during 2002–2014 were studied. The results show that the spectral cosine error correction varied between 4 and 14 %. After that the correction was applied to Brewer UV spectra the relative differences between the QASUME and the Brewer diminished even by 10 %. The study confirms that the method, originally developed for measurements at high latitudes, can be used at mid-latitudes as well. The method is applicable to other Brewers as far as the required input parameters, i.e. total ozone, aerosol information, albedo, instrument specific angular response and slit function are available.

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