Remote sensing detects and monitors the physical and spatial characteristics of the earth's ocean, surface, and atmosphere by measuring the reflected or scattered electromagnetic, optical, or acoustic signals using passive or active sensors. It has long been used in hydrocarbon exploration and related environment evaluation such as mapping surface geology and topography, providing information for evaluation of well sites and oil and gas infrastructure, detecting hydrocarbon seepages and spills, and monitoring ground deformation and characterizing reservoir conditions during production.

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