Publication Abstracts

Prigent et al. 2000

Prigent, C., J.-P. Wigneron, W.B. Rossow, 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.

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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 Trans. Geosci. Remote Sens.},
  volume={38},
  pages={2373--2386},
  doi={10.1109/36.868893},
}

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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.
VL  - 38
SP  - 2373
EP  - 2386
DO  - 10.1109/36.868893
ER  -

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