Volume XLII-3/W9
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-3/W9, 159–163, 2019
https://doi.org/10.5194/isprs-archives-XLII-3-W9-159-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-3/W9, 159–163, 2019
https://doi.org/10.5194/isprs-archives-XLII-3-W9-159-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

  25 Oct 2019

25 Oct 2019

SEA FOG DETECTION BASED ON DYNAMIC THRESHOLD ALGORITHM AT DAWN AND DUSK TIME

J. H. Wan1, L. Jiang1, Y. F. Xiao2, and H. Sheng1 J. H. Wan et al.
  • 1College of Marine and Space Information, China University of Petroleum (East China), Qingdao, China
  • 2First Institute of Oceanography, MNR, Qingdao, China

Keywords: Sea Fog, Dynamic Threshold Algorithm, Dawn and Dusk, Himawari-8

Abstract. Dawn and dusk time is the high frequency period of sea fog occurrence, which is very important for all-day sea fog remote sensing detection. Most polar orbit satellites are limited by time resolution and transit time, and can not detect sea fog at dawn and dusk. Based on the Himawari-8 geostationary satellite data and the analysis of the spectral characteristics of sea fog at dawn and dusk, this paper determines the variation law of the reflectivity and brightness temperature of sea fog at dawn and dusk, chooses sensitive bands, sets the detection index of sea fog and its corresponding dynamic threshold, and realizes the detection of sea fog at dawn and dusk. The case study results indicate that our dynamic threshold algorithm can effectively detect the sea fog at dawn and dusk.