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Portable Remote Imaging Spectrometer coastal ocean sensor: design, characteristics, and first flight results

机译：便携式远程成像光谱仪近海传感器：设计，特性和首次飞行结果

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摘要

The design, characteristics, and first test flight results are described of the Portable Remote Imaging Spectrometer, an airborne sensor specifically designed to address the challenges of coastal ocean remote sensing. The sensor incorporates several technologies that are demonstrated for the first time, to the best of our knowledge, in a working system in order to achieve a high performance level in terms of uniformity, signal-to-noise ratio, low polarization sensitivity, low stray light, and high spatial resolution. The instrument covers the 350-1050 nm spectral range with a 2.83 nm sampling per pixel, and a 0.88 mrad instantaneous field of view, with 608 cross-track pixels in a pushbroom configuration. Two additional infrared channels (1240 and 1610 nm) are measured by a spot radiometer housed in the same head. The spectrometer design is based on an optically fast (F/1.8) Dyson design form coupled to a wide angle two-mirror telescope in a configuration that minimizes polarization sensitivity without the use of a depolarizer. A grating with minimum polarization sensitivity and broadband efficiency was fabricated as well as a slit assembly with black (etched) silicon surface to minimize backscatter. First flight results over calibration sites as well as Monterey Bay in California have demonstrated good agreement between in situ and remotely sensed data, confirming the potential value of the sensor to the coastal ocean science community.
机译：便携式远程成像光谱仪是一种机载传感器，专门设计用于应对沿海海洋遥感的挑战，描述了其设计，特性和首次试飞结果。根据我们的知识，该传感器在工作系统中采用了首次展示的多项技术，从而在均匀性，信噪比，低极化灵敏度，低杂散性方面达到了高性能水平光线好，空间分辨率高。该仪器覆盖350-1050 nm光谱范围，每个像素采样2.83 nm，瞬时视野为0.88 mrad，推扫式配置中具有608个交叉跟踪像素。另外两个红外通道（1240和1610 nm）由安装在同一探头中的点辐射计测量。光谱仪的设计基于光学快速（F / 1.8）戴森（Dyson）设计形式，该设计形式耦合到广角双镜望远镜，其配置可在不使用消偏镜的情况下将偏振灵敏度降至最低。制造了具有最小偏振灵敏度和宽带效率的光栅，以及带有黑色（蚀刻）硅表面的狭缝组件，以最大程度地减少反向散射。在校准地点以及加利福尼亚州蒙特雷湾的首次飞行结果表明，原位与遥感数据之间具有很好的一致性，证实了传感器对沿海海洋科学界的潜在价值。

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