Calibration facility for airborne imaging spectrometers
Calibration facility for airborne imaging spectrometers
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DOI：
10.1117/12.646691
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发表时间：
2005-10
期刊：
影响因子：
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通讯作者：
Birgit Suhr;P. Gege;J. Nieke;K. Itten;G. Ulbrich
中科院分区：
文献类型：
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作者：
Birgit Suhr;P. Gege;J. Nieke;K. Itten;G. Ulbrich
欧空局目前正在建造机载超光谱推扫成像光谱仪APEX（机载棱镜实验），其光谱范围为380至2500 nm。在APEX项目范围内，将进行各种表征测量，例如，机载表征、频繁的实验室表征和替代校准。APEX仪器只有通过在飞行周期之间定期校准仪器才能实现其具有挑战性的测量精度。对于地面表征，需要专用的表征和校准设施，以实现对仪器的全面和准确的校准。鉴于与科学目标的高度相关性，欧空局正在资助一个外部“校准基地”。它位于DLR Oberpfaffenhofen，将于2006年开始运营。CHB提供仪器及其内部参考和机载附件的辐射、光谱和几何地面表征和校准所需的所有硬件和软件工具，并进行测量偏振和杂散光敏感度。这包括试验台和提供基础设施。本文概述了校准设备和概念。
ESA currently builds the airborne hyper-spectral push broom imaging spectrometer APEX (Airborne Prism EXperiment) operating in the spectral range from 380 to 2500 nm. In the scope of the APEX project a large variety of characterization measurements will be performed, e.g., on-board characterization, frequent laboratory characterization, and vicarious calibration. The APEX instrument will only achieve its challenging measurement accuracy by regular calibration of the instrument between flight cycles. For that on-ground characterisation, a dedicated characterisation and calibration facility is necessary to enable a comprehensive and accurate calibration of the instrument. In view of the high relevance to scientific objectives, ESA is funding an external "Calibration Home Base" (CHB). It is located at DLR Oberpfaffenhofen and will be operational from 2006 on. The CHB provides all hard- and software tools required for radiometric, spectral and geometric on-ground characterisation and calibration of the instrument and its internal references and on-board attachments, and to perform measurements on polarisation- and straylight-sensitivity. This includes a test bed and the provision of the infrastructure. In this paper the calibration equipment and concept is outlined.