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首页> 美国政府科技报告 >Evaluation of Un-Cooled Detectors for Low-Cost Thermal-IR Earth Observation at the Surrey Space Center
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Evaluation of Un-Cooled Detectors for Low-Cost Thermal-IR Earth Observation at the Surrey Space Center

机译：评估萨里航天中心低成本热红外地球观测的非冷却探测器

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In 2004, the four-micro-satellite Disaster Monitoring Constellation (DMC) became operational. While the constellation currently utilizes visible and near-infrared (IR) imagers, a candidate instrument for future DMC satellites is one operating in the thermal-infrared (TIR). In this research program, a prototype TIR imaging radiometer compatible with the DMC imaging suite was engineered. The 2.5 kg prototype instrument uses a 2-dimensional, commercial-off-the-shelf (COTS) uncooled micro-bolometer array to collect data in any of several mid-wave and long-wave IR bands (3-5, 8-10, 10-12, and 8-14 micrometers). After characterizing the performance of the prototype, a computer model was created to predict its on-orbit performance. Analysis showed that a flight version of this instrument would yield around a 0.5 K noise equivalent temperature difference (NETD) for a 300 K ground scene, a 300-meter ground sample distance (GSD), and a 185-kilometer ground swath. Its application in special niche, or currently ill-served mission areas, is proposed. One such application is autonomous global thermal change detection, dedicated to highly specialized user communities.

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