| Title | Identification of clear and cloudy pixels at high latitudes from AVHRR radiances
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| Author | Sakellariou, N; Leighton, H G; Li, Z |
| Source | International Journal of Remote Sensing vol. 14, issue 10, 1993 p. 2005-2024, https://doi.org/10.1080/01431169308954017 |
| Year | 1993 |
| Alt Series | Earth Sciences Sector, Contribution Series 20041369 |
| Publisher | Informa UK Limited |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Subjects | Science and Technology; remote sensing; spectral ratios; spectral analyses; satellites; satellite imagery |
| Released | 2007 05 07 |
| Abstract | A technique to distinguish between clear and cloudy regions at high latitudes in the summer by satellite measured radiances is described. The method uses multi-spectral AVHRR data to first ascertain the
surface types that are present within scenes consisting of 34 by 34 GAC pixels (? 150 km by 150km) and then, depending on which surface types are present, a set of thresholds of varying complexity to detect cloudy pixels. Results of the automatic
analyses are compared with manual analyses and a published analysis that employs a different approach. For the most part agreement among the different analyses is good but regions in which there is disagreement are identified and discussed.
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| GEOSCAN ID | 218171 |
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