Interpretation of Nimbus 5 SCR data for obtaining vertical temperature profiles
✍ Scribed by Gy. Molnár
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 376 KB
- Volume
- 105
- Category
- Article
- ISSN
- 0035-9009
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✦ Synopsis
Abstract
In this paper a statistical estimator is used to retrieve vertical temperature profiles above an area for which autocorrelation matrices of the temperature profile have been computed for each season using radiosonde data. The temperature dependence of atmospheric transmittance has been taken into account. We find that in cloudless cases the retrieved vertical temperature profiles have an average r.m.s. error of 2–3.5 K, when compared with appropriate radiosonde measurements. We note that to achieve this rather satisfactory result it is not necessary to divide the atmosphere into more than 18 levels; and we will show that it is advantageous to use the total covariance matrices instead of only the diagonal elements. To obtain further comparisons between retrieved and radiosonde profiles, the analysed gridded radiance values have been used, and in this case the r.m.s. error is 2.5–3.8 K.