15 May 2001 Multispectral photometer: new instrument for atmospheric limb tomography
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Abstract
Satellite based scientific studies of the upper atmosphere are most effectively pursued by remote sensing techniques using spectral imaging from orbit. Observing in the orbital plane towards the limb 1D intensity profiles are collected and inverted into luminosity distributions. In most studies only a few key spectral regions are of interest and the maximization of the signal to noise ratio within these regions ins of prime importance. A novel instrument is described in which the spectral separation of the radiation is accomplished by using strip filters instead of a diffraction grating and the vertical intensity profile of the atmosphere is imaged on the strip filter by a special optical system incorporating cylindrical lens elements. The optical system has high resolution imaging in the vertical direction and has a well-defined field of view in the horizontal field of view is rejected. By adjusting the width of the filter strips it is possible to adjust the signal to noise ratio of each wavelength channel. The filters are in a telecentric position for minimizing their spectral pass- band. The spectral resolution is limited only by the filter elements and it is not restricted by spectral slit width considerations. The instrument performance is compared to an equivalent size grating instrument.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephen B. Mende, "Multispectral photometer: new instrument for atmospheric limb tomography", Proc. SPIE 4306, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications II, (15 May 2001); doi: 10.1117/12.426962; https://doi.org/10.1117/12.426962
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KEYWORDS
Optical filters

Image filtering

Imaging systems

Sensors

Satellites

Temperature metrology

Airglow

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