Spaceborne Hyperspectral Image Generation based on Airborne Hyperspectral Image

Abstract

In order to support spaceborne hyperspectral sensor system design, an end-to-end simulation model for spaceborne hyperspectral image generation starting from the airborne image has been developed in this paper. Airborne image after being resampled both in the space and spectrum performs as the at-sensor radiance that is the input of the sensor model. Sensor model is the main part of proposed model. According to the sensor's imaging process, the simulation is divided into four sub-modules, which are optics, detector, electronics parts and system noise. Based on the theory of optical transfer function (OTF), each sub-module can be treated as a spatial filter and thus its simulation can be realized in the spatial frequency domain. Using parameters of spaceborne sensor Hyperion as well as the image acquired by Airborne Visible and Infrared Imaging Spectrometer (AVIRIS), the validity of the proposed model for sensor design and operation are also demonstrated in the paper.