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A new era of commercial high-resolution imagery from space began late in 1999 resulting in resolution that is now sufficient to resolve marine mammals. This encouraged investigating the use of satellite imagery for marine-mammal population census and related studies. The question was raised: Can marine mammals be reliably detected above sensor noise and(More)
jOmegak ABSTRACT The near shore bathymetry can be mapped with remote sensing of the motion of shoaling gravity waves. This method can be used with satellite imaging systems that can image a series of images with high resolution. Previous validation of this technique used two satellite images taken 10 s apart.. This paper reports on another validation with(More)
The exploitation of synthetic aperture properties in nadir-looking radars is opening new scenarios in the framework of satellite radar altimetry. Both recent and upcoming missions including Cryosat-2, Sentinel-3, Sentinel-6 and SWOT take benefit from the coherent processing of radar data, aimed at improving range measurements in particular contexts, such as(More)
This paper follows earlier work showing a new approach to observe water bodies from Earth orbiting satellites [1, 2, 3, 4]. The basic idea was the measurement of the water volume as first developed by Heron, a mathematician and citizen of ancient Alexandria. As the water level rises and falls, the volume of slices of the water column can be measured. Each(More)
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