Detection of narrow open-water channels from JERS-1 SAR images of Amazon forests

Takako Sakurai-Amano; Joji Iisaka; Mikio Takagi

doi:10.1117/12.410589

21 December 2000 Detection of narrow open-water channels from JERS-1 SAR images of Amazon forests

Takako Sakurai-Amano, Joji Iisaka, Mikio Takagi

Proceedings Volume 4152, Microwave Remote Sensing of the Atmosphere and Environment II; (2000) https://doi.org/10.1117/12.410589
Event: Second International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 2000, Sendai, Japan

Abstract

We have developed a new, fully automatic method for detecting and visualizing narrow open-water rivers from 3- look JERS-1 SAR images of Amazon rainforests. We expect this method to become an operational tool for detecting river water levels in remote tropical rainforests for the purposes of environmental and disaster monitoring. To demonstrate its use, we apply this method to eight continuous and one isolated Amazon scene. The resulting approximate range of waterways corresponds highly with those seen in JERS-1 VNIR image data observed one week later in cloud-free areas. Estimates from the optical JERS-1 VNIR images give the minimum detectable width of those visualized rivers to be approximately 20 m. The brightness of the river can be used to estimate the width of the fiver from approximately 20m to approximately 150m. In wider rivers, dark areas become predominant.

Citation Download Citation

Takako Sakurai-Amano, Joji Iisaka, and Mikio Takagi "Detection of narrow open-water channels from JERS-1 SAR images of Amazon forests", Proc. SPIE 4152, Microwave Remote Sensing of the Atmosphere and Environment II, (21 December 2000); https://doi.org/10.1117/12.410589

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