Microwave emission of soil freezing and thawing observed by a truck-mounted microwave radiometer
| Autor: | Lixin Zhang, Shaojie Zhao, Yongpan Zhang, Lingmei Jiang |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
business.industry Oscillation Microwave radiometer Astrophysics::Cosmology and Extragalactic Astrophysics Dielectric Interference (wave propagation) Amplitude Optics Microwave emission Brightness temperature General Earth and Planetary Sciences business Astrophysics::Galaxy Astrophysics Microwave Remote sensing |
| Zdroj: | International Journal of Remote Sensing. 33:860-871 |
| ISSN: | 1366-5901 0143-1161 |
| Popis: | This article presents a study of the interference effect of the microwave emission of soil during freezing and thawing processes. The microwave brightness temperature TB was measured at the C 6.925 GHz, X 10.65 GHz, K 18.7 GHz and Ka 36.5 GHz bands using a truck-mounted dual-polarized microwave radiometer. Obvious TB oscillation behaviour was shown in the results, which were compared with both coherent and non-coherent emission models. The characteristics of the measured and modelled results were similar, except for the oscillation frequency and amplitude. This was attributed to the error in estimation of the dielectric constant of frozen soil and some other factors. This effect was important in analysing the experimental data. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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