30 November 2017 Microwave absorption ambiguity of pine needles at negative temperatures
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Proceedings Volume 10466, 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 104660I (2017) https://doi.org/10.1117/12.2281271
Event: XXIII International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2017, Irkutsk, Russian Federation
Abstract
The paper presents experimental data on electromagnetic radiation propagation at a frequency of 5.2 GHz through pine needles at negative temperatures. Hysteresis of electromagnetic losses under a temperature cycling in the range from -10 to -30°С is revealed. Variations in the signal power at the same temperature and mean attenuation of 3 dB reach 1.6 dB. This effect should be taken into account under remote sensing of coniferous forests in winter.
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A. A. Gurulev, A. A. Gurulev, I. I. Zheleznyak, I. I. Zheleznyak, S. V. Tsyrenzhapov, S. V. Tsyrenzhapov, } "Microwave absorption ambiguity of pine needles at negative temperatures", Proc. SPIE 10466, 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 104660I (30 November 2017); doi: 10.1117/12.2281271; https://doi.org/10.1117/12.2281271
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