Remote Evaluation of Albedo Using Photorecording Equipment
We developed and tested the method for determining the surface albedo using photorecording devices and solar radiation equipment. Our method is based on the utilization of commercially available measurement equipment, which allows us to correctly estimate the albedo, reducing the time spent on data collection. The calculated exposure data, parameters of the lens and photorecording devices affecting the exposure, and data on capture parameters are taken into account in the analysis of the collected photographic data to calculate the brightness of the scene. The brightness is normalized to exclude the impact of exposure metering errors. Albedo is represented as a function of the measured total solar radiation and the normalized luminance. The theoretical basics of the developed method and the results of field tests have been considered. We concluded based on the obtained results on the possibility of using the method, its further improvement and its use to collect field data.
Keywords:albedo remote sensing solar radiation the exposure meter photogrammetry
This work was supported by the Russian Foundation for Basic Research, project no. 18-05-00471, AARI project (no. 220.127.116.11) “Studies of climatic characteristics of the Antarctic and the Southern Ocean” and Russian Antarctic Expedition no. 63.
- 1.http://www.dxomark.com/Cameras/Nikon/D610.Google Scholar
- 2.Il’inskii, I., Zonal system of exposure, Fotomagazin, 1998, nos. 1–2, pp. 94–98.Google Scholar
- 3.ISO 12232:1998 Photography, Electronic still-picture cameras, Determination of ISO speed. http://www.iso.org/ iso/ru/home/store/catalogue_ics/catalogue_detail_ics. htm?csnumber=21020.Google Scholar
- 4.ISO 12232:2006 Photography, Digital still cameras, Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure index. http://www.iso.org/iso/ru/home/store/catalogue_ tc/catalogue_detail.htm?csnumber=37777.Google Scholar
- 5.Kantselenbogen, E.D., Photo and video technology, in Entsiklopediya (Encyclopedia), Iofis, E.A., Ed., Moscow: Sovetskaya entsiklopediya, 1981.Google Scholar
- 6.MIPT: Albedo—software for hyperspectral data processing. http://geo.mipt.ru/albedo/.Google Scholar
- 7.Rossiiskii Gidrometeorologicheskii entsiklopedicheskii slovar’ (Russian Encyclopedic Dictionary of Hydrometeorology), Bedritskii, A.I., Ed., St. Petersburg: Letnii sad, 2008.Google Scholar
- 8.Rukovodstvo Gidrometeorologicheskim stantsiyam po aktinometricheskim nablyudeniyam (Guide to Hydrometeorological Stations on Actinometric Observations), Gushchin, G.P. and Barashkova, E.P., Eds., Leningrad: Gidrometeoizdat, 1973.Google Scholar