- PII
- 10.31857/S0033849424070025-1
- DOI
- 10.31857/S0033849424070025
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 69 / Issue number 7
- Pages
- 609-621
- Abstract
- Under long-time experiments, the possibility of remote sensing of soil moisture with ultra-wideband (UWB) electromagnetic impulses from an unmanned aerial vehicle (UAV) was investigated. The soil surface of test sites with varying degrees of roughness was under fallow in conditions of natural moisture, drying, and periodic harrowing. The soil moisture was found by inverse problem solving, while minimizing the norm of discrepancy between the module of reflection coefficients, which were calculated using the Fresnel formula (for dielectrically homogeneous half-space) and the average values, measured at different hovering heights of the UAV over the sensing test sites. During the experiments from June 12 to September 28, 2022, the achievability of practically significant accuracy of remote sensing of volumetric soil moisture on the test sites in a 6—7 cm topsoil with a standard deviation of less than 4 % (relative to the weighted-drying measurements of soil samples, in-situ collected) was demonstrated. As a result, it was shown that in the frequency range of the sensing impulse from 456 MHz to 1014 MHz, the influence of diffuse scattering of waves on random soil surface roughness (standard deviations of the heights of roughness less than 2 cm) can be neglected within the above-mentioned error in the soil moisture retrieval.
- Keywords
- Дистанционное зондирование радиолокация беспилотный летательный аппарат сверхширокополосные импульсы влажность почв шероховатость поверхности почвы
- Date of publication
- 16.09.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 22
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