Abstract
Wide Swath and High Resolution Airborne Pushbroom Hyperspectral Imager (WiSHiRaPHI) is the new-generation airborne hyperspectral imager instrument of China, aimed at acquiring accurate spectral curve of target on the ground with both high spatial resolution and high spectral resolution. The spectral sampling interval of WiSHiRaPHI is 2.4 nm and the spectral resolution is 3.5 nm (FWHM), integrating 256 channels coving from 400 nm to 1000 nm. The instrument has a 40-degree field of view (FOV), 0.125 mrad instantaneous field of view (IFOV) and can work in high spectral resolution mode, high spatial resolution mode and high sensitivity mode for different applications, which can adapt to the Velocity to Height Ratio (VHR) lower than 0.04. The integration has been finished, and several airborne flight validation experiments have been conducted. The results showed the system’s excellent performance and high efficiency.
Highlights
Spectral imagers can acquire 2D spatial image, and spectral information of the target on Earth [1]
The swath width from U2 platform is 10.5 km, with instantaneous field of view (IFOV) of about 1 mrad
The main features are shown in these airborne hyperspectral imagers have been widely used in many fields [14,15,16,17], low spectral or spatial resolution or small field of view (FOV) restricting the working efficiency cannot meet the requirements of many modern applications
Summary
Spectral imagers can acquire 2D spatial image, and spectral information of the target on Earth [1]. These airborne hyperspectral imagers have been widely used in many fields [14,15,16,17], low spectral or spatial resolution or small field of view (FOV) restricting the working efficiency cannot meet the requirements of many modern applications. Sensors 2019, 19, 1667 dynamic range and wider FOV so that the pollution or crops can be investigated rapidly with high efficiency [18] Under these circumstances, the new airborne hyperspectral imager project, Wide Swath and High. To make sure that the new imager has a high working efficiency, the FOV of WiSHiRaPHI is designed to be 40 degrees with a 0.125 mrad IFOV and 2.4 nm spectral sampling interval
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