An Efficient Algorithm for Inversion of Truncated Spiral Cone Beam Data

提出了一种新的傅里叶变换光谱分析方法。 FTS的主要优点是与色散或滤光片光谱仪相比，吞吐量有了巨大的提高。 然而，传统的FTS技术需要精确的扫描镜。 这种要求显著地增加了成本，并且难以实现用于移动平台或用于动态目标。 最近的技术不需要扫描。这提供了同时获取所有光谱带的能力，允许来自移动平台的高空间分辨率，提高了可靠性，并降低了质量、体积和成本。然而，这些非扫描FTS尚未能够利用FTS的巨大潜在吞吐量优势，因为它们需要以“推扫”模式操作。 在这种模式下，窄缝将视场（FOV）遮蔽为窄条，这严重降低了吞吐量。 所提出的方法使用反卷积技术，以提供空间分辨率沿磁道，而不需要一个窄场掩模。 因此，这种技术可以同时提供传统的FTS的吞吐量优势，和所有的优点，非扫描FTS.成像光谱是一个强大的工具，地球科学，特别是土地覆盖和土地利用变化的调查。当应用于空间科学，特别是太阳系的探索时，成像光谱法是全球确定表面矿物学的主要工具，也可用于研究大气成分。在人类探索和空间开发中，光谱测定法正通过观察排气羽流用于诊断可重复使用的火箭发动机。 所提出的技术提供了一个因素的10至1000的优势，在吞吐量相比，目前的成像光谱技术，允许大大提高辐射分辨率。没有移动部件提高了可靠性并降低了成本、质量和功率要求。

A new approach for Fourier transform spectrometry (FTS) is proposed. The principal advantage of FTS is the tremendous throughput improvement compared to dispersive or filter spectrometers. Traditional FTS techniques, however, require a precision scanning mirror. This requirement significantly increases the cost, and is difficult to implement for use from a moving platform or for a dynamic target. A more recent technique does not require scanning. This provides the ability to acquire all spectral bands simultaneously, allows high spatial resolution from a moving platform, improves the reliability, and lowers the mass, volume and cost. These non-scanning FTS, however, have yet been unable to exploit the tremendous potential throughput advantage of FTS, since they require operation in a "pushbroom" mode. In this mode, a narrow slit masks the field-of-view (FOV) to a narrow strip and this severely reduces the throughput. The proposed approach uses deconvolution techniques to provide spatial resolution along-track, without the need for a narrow field mask. This technique can therefore simultaneously provide both the throughput advantage of traditional FTS, and all the advantages of non-scanning FTS.Imaging spectrometry is a powerful tool for Earth Science, particularly for investigation of land cover and land use change. When applied to Space Science, particularly exploration of the solar system, imaging spectrometry is the primary tool for global determination of surface mineralogy and is also useful for studies of atmospheric composition. In Human Exploration and Development of Space, spectrometry is being employed for diagnostics of reusable rocket engines, by observation of the exhaust plume. The proposed technique provides a factor of 10 to 1000 advantage in throughput compared to current techniques for imaging spectrometry, allowing greatly improved radiometric resolution. The absence of moving parts improves the reliability and lowers the cost, mass and power requirements.