| タイトル | Simulated and observed 37 GHz emission over Africa |
| 著者（英） | Chien, Y. L.; Wang, J. R.; Choudhury, B. J.; Hsu, A. Y. |
| 著者所属（英） | Centel Federal Services Corp.|Science Systems and Applications, Inc.|NASA Goddard Space Flight Center |
| 発行日 | 1990-10-01 |
| 言語 | eng |
| 内容記述 | A model for simulating polarized 37-GHz microwave emissions from vegetated surfaces is proposed. An equation expressing the radiative transfer is solved using a two-point Gauss quadrature method. Surface temperature, reflectance, normalized difference, and polarized brightness temperatures are obtained from processed multispectral satellite data. The model simulations are evaluated against satellite data collected between January 1982 and December 1983 along a transect going from rain forest to hot desert over Africa (0 deg to 20 deg N, 11 deg E). It is found that the temporal variation of the average brightness temperature matches closely the surface temperature. The seasonal variation of the polarization difference is confined within the latitude band of 8 deg to 18 deg N, but the normalized difference continues to show seasonal variation south of 8 deg N. The relations between the polarization difference and the normal difference and between the polarization difference and the reflectance are considered to be nonlinear and almost linear, respectively. |
| NASA分類 | EARTH RESOURCES AND REMOTE SENSING |
| レポートNO | 91A12632 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/352179 |
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