High-Resolution Imaging of Radiation Brightness Temperature Obtained by Drone-Borne Microwave Radiometer

Round 1

Reviewer 1 Report

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Reviewer 2 Report

The easy- to- read and interesting article leaves a good impression. The paper is devoted to the issues of adaptation, calibration and binding to the terrain of data obtained from a radiometer installed on an unmanned aerial vehicle.

In 1970-1990, remote microwave sensing of the underlying surface was mainly implemented from an aircraft (small aircraft, type AN-2) at a low altitude (50-100 m). Among current trends in the development of tools and methods for remote sensing are unmanned aerial vehicles (UAVs).

The problems of using UAVs and small aircraft are basically similar (installation on an aircraft, power supply, data calibration, localization, etc.). In terms of application of a new instrumentation fleet and aircraft, the problems discussed in this paper undoubtedly have a scientific novelty.

When calibrating the radiometer, a special attention should be paid to the influence of physical characteristics of soil (moisture, salinity, texture) in summer, whereas in winter - to depth of soil freezing, ice thickness on the water surface and possible interference effects. When calibrating against the cold sky (if a radiometer antenna is turned up), errors are possible (if the antenna has side lobes).

Page 1, line 43: using mannned aircraft

Author Response

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