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| Titel: |
Determination of cloud coverage over Denmark using Landsat MSS/TM and NOAA-AVHRR |
| Auteur: |
Jorgensen, P. V. |
| Verschenen in: |
International journal of remote sensing |
| Paginering: | Jaargang 21 (2000) nr. 17 pagina's 3363-3368 |
| Jaar: |
2000-11-20 |
| Inhoud: |
The average cloud coverage over Danish waters was calculated for the period 1975-1995 using 5487 Landsat MSS/TM images and 1571 NOAAAVHRR images. In the case of MSS/TM images, the classifications of cloud coverage between 0 and 9 (0 = no clouds, 9 = 100% cloud covered) determined by the ground station operator at Kiruna or Fucino, were used to determine average cloud cover on a monthly and yearly basis for 12 selected frames. The MSS/TM images showed an average yearly cloud coverage of 67.5%, which is close to the 66% calculated from meteorological in situ observations (standard normals 1961-1990). In the case of NOAA-AVHRR, an automatic digital classification of cloud covered pixels (0-99%) was used, and resulted in an average yearly coverage of 77.1%. The accuracy of the Landsat MSS/TM cloud coverage estimations was examined using visual inspections of a number of photo-quality quicklooks, while the accuracy of the NOAA-AVHRR cloud coverage percentages was examined using an advanced supervised multi-spectral classification on a number of scenes. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 89 van 268 gevonden artikelen
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