Publication Abstracts
Prigent et al. 2000
Prigent, C., J.-P. Wigneron, , and J.R. Pardo-Carrion, 2000: Frequency and angular variations of land surface microwave emissivities: Can we estimate SSM/T and AMSU emissivities from SSM/I emissivities? IEEE Trans. Geosci. Remote Sens., 38, 2373-2386, doi:10.1109/36.868893.
To retrieve temperature and humidity profiles from SSM/T and AMSU, it is important to quantify the contribution of the Earth surface emission. So far, no global estimates of the land surface emissivities are available at SSM/T and AMSU frequencies and scanning conditions. The land surface emissivities have been previously calculated for the globe from the SSM/I conical scanner between 19 and 85 GHz. To analyze the feasibility of deriving SSM/T and AMSU land surface emissivities from SSM/I emissivities, the spectral and angular variations of the emissivities are studied, with the help of ground-based measurements, models and satellite estimates. Up to 100 GHz, for snow and ice free areas, the SSM/T and AMSU emissivities can be derived with useful accuracy from the SSM/I emissivities. The emissivities can be linearly interpolated in frequency. Based on ground-based emissivity measurements of various surface types, a simple model is proposed to estimate SSM/T and AMSU emissivities for all zenith angles knowing only the emissivities for the vertical and horizontal polarizations at 53 degrees zenith angle. The method is tested on the SSM/T-2 91.655 GHz channels. The mean difference between the SSM/T-2 and SSM/I- derived emissivities is ≤ 0.001 for all zenith angles with an r.m.s. difference of ∼0.02. Above 100 GHz, preliminary results are presented at 150 GHz, based on SSM/T-2 observations and are compared with the very few estimations available in the literature.
Export citation: [ BibTeX ] [ RIS ]
BibTeX Citation
@article{pr06000k,
author={Prigent, C. and Wigneron, J.-P. and Rossow, W. B. and Pardo-Carrion, J. R.},
title={Frequency and angular variations of land surface microwave emissivities: Can we estimate SSM/T and AMSU emissivities from SSM/I emissivities?},
year={2000},
journal={IEEE Transactions on Geoscience and Remote Sensing},
volume={38},
pages={2373--2386},
doi={10.1109/36.868893},
}
[ Close ]
RIS Citation
TY - JOUR ID - pr06000k AU - Prigent, C. AU - Wigneron, J.-P. AU - Rossow, W. B. AU - Pardo-Carrion, J. R. PY - 2000 TI - Frequency and angular variations of land surface microwave emissivities: Can we estimate SSM/T and AMSU emissivities from SSM/I emissivities? JA - IEEE Trans. Geosci. Remote Sens. JO - IEEE Transactions on Geoscience and Remote Sensing VL - 38 SP - 2373 EP - 2386 DO - 10.1109/36.868893 ER -
[ Close ]
