IEEE Geoscience and Remote Sensing Magazine - December 2019 - 23

The Advanced
Hyperspectral Imager

©ISTOCKPHOTO.COM/BLAMB

Aboard China's GaoFen-5 satellite

T

his article introduces the design and imaging principles
of the Advanced Hyperspectral Imager (AHSI) aboard
China's GaoFen-5 satellite. The AHSI is a visible and nearinfrared (VNIR)/short-wave infrared (SWIR) HSI. It is the
first spaceborne hyperspectral sensor that utilizes both
a convex-grating spectrophotometry and an improved
three-concentric-mirror (Offner) configuration. It has 330
spectral bands, a 60-km swath width, and a 30-m spatial
resolution. Various tests have been designed to evaluate its
imaging performance, and the results indicate that the AHSI's performance is comparable to other spaceborne HSIs
launched recently and those scheduled for launch in the
next few years. The AHSI has the capability to detect and
identify different ground objects.

INTRODUCTION TO HYPERSPECTRAL
IMAGING TECHNOLOGY
Hyperspectral imaging technology provides high spectralresolution information about objects on the Earth. It is an
important remote sensing technique for target detection,
environmental monitoring, land resources exploration, disaster monitoring, precision agriculture, forestry surveying,
and urban planning. However, various applications [1]-[9]
require a broader spectral range and swath width; higher
spectral, spatial, and temporal resolutions; higher detection sensitivity; and calibration accuracy for hyperspectral
sensors [10].
Hyperion [11] and the Compact High-Resolution
Imaging Spectrometer (CHRIS) [12] have been the main

YIN-NIAN LIU, DE-XIN SUN, XIAO-NING HU, XIANG YE, YUN-DUAN LI,
SHU-FENG LIU, KAI-QIN CAO, MENG-YANG CHAI, WEI-YI-NUO ZHOU, JING ZHANG,
YING ZHANG, WEI-WEI SUN, AND LEI-LEI JIAO
Digital Object Identifier 10.1109/MGRS.2019.2927687
Date of current version: 18 December 2019

DECEMBER 2019

IEEE GEOSCIENCE AND REMOTE SENSING MAGAZINE

0274-6638/19©2019IEEE

23


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IEEE Geoscience and Remote Sensing Magazine - December 2019

Table of Contents for the Digital Edition of IEEE Geoscience and Remote Sensing Magazine - December 2019

Contents
IEEE Geoscience and Remote Sensing Magazine - December 2019 - Cover1
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IEEE Geoscience and Remote Sensing Magazine - December 2019 - Contents
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