论文标题

红外遥感使用低噪声雪崩光电二极管检测器

Infrared Remote Sensing Using Low Noise Avalanche Photodiode Detector

论文作者

Mathew, Joice, Gilbert, James, Sharp, Robert, Grigoriev, Alexey, Cardena, Nicolas, Yebra, Marta

论文摘要

对于遥感光学有效载荷以达到约10-30 m的接地采样距离,一个关键的问题是平台引起的运动模糊。虽然向前运动补偿可以降低此运输速度,但它以更具挑战性的卫星态度控制系统为代价,并引起可变的观察/照明角度。可以通过以与接地分辨率元件的像素交叉时间匹配的帧速率读取传感器系统来冻结这种相对运动。要使用此时间段集成(TDI)的方法实现高分辨率,需要高速,因此接近“零”读取噪声检测器阵列,以免淹没观察到的信号。这需要与智能人工智能(AI)在板载处理中的快速框架读数和直接接口相关的控制电子设备。通过这种技术,该平台冻结了其有关地面的动作,从而减少了对态度控制系统的需求,否则这些需求很难在小型卫星平台上实施。在这里,我们报告了澳大利亚国立大学的Ozfuel任务,该任务应用了该技术解决方案,通过高框架速率成像提供高地面分辨率。 Ozfuel建于Leonardo saphira汞池尿酸钙线性模式电子雪崩光电二极管(LMEAPD)检测器,内部开发的Rosella Electronics Control System。该任务将在一套短波红外(SWIR)通带中提供一个集成的传感器系统,用于监视桉树的易燃性。 Ozfuel Mission概念的重点是应用SWIR遥感数据,以对容易发生的澳大利亚环境中的燃料负载和水分含量进行战略评估。

For a remote sensing optical payload to achieve a Ground Sampling Distance of ~ 10-30 m, a critical problem is platform-induced motion blur. While forward motion compensation can reduce this transit speed, it comes at the expense of a more challenging satellite attitude control system and induces a variable observation/illumination angle. This relative motion can be frozen out by simply reading the sensor system at a frame rate that matches the ground resolution element's pixel crossing time. To achieve high resolution using this Time-Delay Integration (TDI)-like approach requires high speed and hence near "zero" readout noise detector arrays to avoid swamping the observed signal. This requires associated control electronics for fast frame readout and direct interface with smart- Artificial Intelligence (AI) onboard processing. With this technique, the platform freezes out its movement concerning the ground, reducing the demands placed on the attitude control systems, which can otherwise be difficult to implement on a small satellite platform. Here we report the Australian National University's OzFuel mission which applies this technical solution to deliver high ground resolution via high frame rate imaging. OzFuel is built around the Leonardo SAPHIRA Mercury Cadmium Telluride linear mode electron avalanche photodiode (LMeAPD) detector and the in-house developed Rosella electronics control system. The mission will deliver an integrated sensor system in a suite of Short-Wave Infrared (SWIR) passbands dedicated to monitoring the flammability of Eucalypt trees. The OzFuel mission concept focuses on the application of SWIR remote sensing data to deliver a strategic evaluation of fuel loads and moisture content in the bushfire-prone Australian environment.

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