I.A. Sidorov1, G.A. Gudkov2, S.V. Agasieva3, S.V. Chizhikov4

1,2,4 Bauman Moscow State Technical University (Moscow, Russia)

3 RUDN University (Moscow, Russia)

1 igorasidorov@yandex.ru; 2 ggudkov967@gmail.com; 3 agasieva-sv@rudn.ru; 4 chigikov95@mail.ru

A dual-polarization L-band microwave radiometer was developed and tested for remote soil moisture measurement. The tests were conducted to study the possible integration of soil moisture and temperature data obtained by the radiometer into the precision farming system.

The purpose of this work is to clarify and substantiate the main technical parameters of a new microwave radiometer for determining moisture content portraits of large areas of agricultural land, based on the analysis of the results of flight tests of dual-polarization microwave radiometric remote soil moisture indicator, which were conducted using a quadrocopter in different regions of the Russian Federation.

Crop yields are determined by moisture content in the productive layer of soil. To obtain data on soil moisture at different depths it is necessary to use multi-frequency radiometers. So, the use of a multi-frequency microwave radiometer with wavelengths of 21, 11 and 5.5 cm was justified. The mass of such radiometer should not exceed 5 kg. and dimensions not more than 360x360x60 mm. so that it could be used as a carrier of small class UAV with payload not more than 5 kg. The second sensitivity should be no worse than 0.5 degrees. Continuous operation time from the built-in battery is not less than 3 hours.

Sidorov I.A., Gudkov G.A., Agasieva S.V., Chizhikov S.V. Main technical requirements for radiometric system for remote soil moisture meter. Radiotekhnika. 2024. V. 88. № 11. P. 181−185. DOI: https://doi.org/10.18127/j00338486-202411-21 (In Russian)

1. Shutko A.M., Novichihin E.P., Marechek S.V., Pljushhev V.A., Sidorov I.A., Birjukov E.D., Reshhikov A.D., Haarbrink R. Poljarimetricheskaja sistema iz dvuh SVCh-radiometrov tipa «Ranet-21». Radiotehnika. 2013. № 1. S. 123-126 (in Ruaaian).
2. Patent №2737068 (RF) Distancionnyj vlagomer. Sidorov I.A., Agasieva S.V., Gorlacheva E.N. Prioritet ot 05.02.2020. Klass MKI G01N22/04 (in Ruaaian).
3. Gudkov A.G., Agasieva S.V., Sidorov I.A., Khokhlov N.F., Chernikov A.S., Vagapov Y. A portable microwave radiometer for proximal measurement of soil permittivity. Computers and Electronics in Agriculture. July 2022. V. 198. DOI: 10.1016/j.compag.2022.107076.
4. Sidorov I.A., Gudkov A.G., Novichihin E.P., Leushin V.Ju., Hohlov N.F., Bolotov A.G., Chizhikov S.V. Rezul'taty naturnyh jeksperimentov po distancionnomu opredeleniju portretov vlazhnosti pochvy. Ch. 1. Nanotehnologii: razrabotka, primenenie - XXI vek». 2022. № 4. S. 45-60. DOI: https://doi.org/10.18127/j22250980-202204-05 (in Ruaaian).
5. Sidorov I.A., Gudkov A.G., Novichihin E.P., Hohlov N.F., Bolotov A.G., Chizhikov S.V., Pchelincev V.Je., Sinavchian V.S. Rezul'taty naturnyh jeksperimentov po distancionnomu opredeleniju portretov vlazhnosti pochvy. Ch. 2. Nanotehnologii: razrabotka, primenenie – XXI vek. 2023. T. 15. № 1. S. 41–53. DOI: https://doi.org/10.18127/j22250980-202301-04 (in Ruaaian).
6. Sidorov I.A., Gudkov A.G., Oblivancov V.V., Ermolov P.P., Novichihin E.P., Leushin V.Ju., Agandeev R.V. Radiometricheskoe distancionnoe opredelenie portretov vlazhnosti pochvy na vinogradnike v Krymu. Jelektromagnitnye volny i jelektronnye sistemy. 2022. T. 27. № 5. S.65−70. DOI: https://doi.org/10.18127/j15604128-202205-09 (in Ruaaian).