Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2016, Vol. 13, No. 4, pp. 252-260
Scaling factor between reflected shortwave radiation measured by IKOR-M on board the Meteor-M No. 1 and 2
M.B. Bogdanov
1 , V.A. Vorobyov
1 , A.I. Kotuma
1 , M.Yu. Cherviakov
1 1 Saratov State University, Saratov, Russia
Accepted: 27.08.2016
DOI: 10.21046/2070-7401-2016-13-10-252-260
The IKOR-M radiometer is a satellite instrument that measures reflected shortwave radiation (0.3−4.0 µm). Such measurements can be used to derive the Earth’s surface albedo and absorbed solar radiation. This radiometer worked on board the Meteor-M No. 1 satellite for five years, from September 2009 until the end of the satellite operation in September 2014. We investigated the effect of aging of this instrument, which was found to cause a decrease in sensitivity. Linear trend parameters of measured albedo are estimated for the Earth's surface areas with approximately constant values of this characteristic. The estimated change in radiometer sensitivity over time is obtained. A twin radiometer IKOR-M was installed on board the Meteor-M No. 2 satellite launched on August, 8, 2014. Both radiometers worked simultaneously for approximately a month. A scaling factor between the two radiometers was found by comparing of the global distribution maps of monthly averaged albedo values.
Keywords: shortwave radiation, albedo, algorithms, radiometers, satellites
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