3 November 2003 Imaging Multi-Order Fabry-Perot Spectrometer (IMOFPS) for spaceborne measurements of CO
Author Affiliations +
Abstract
An instrument concept for an Imaging Multi-Order Fabry-Perot Spectrometer (IMOFPS) has been developed for measuring tropospheric carbon monoxide (CO) from space. The concept is based upon a correlation technique similar in nature to multi-order Fabry-Perot (FP) interferometer or gas filter radiometer techniques, which simultaneously measure atmospheric emission from several infrared vibration-rotation lines of CO. Correlation techniques provide a multiplex advantage for increased throughput, high spectral resolution and selectivity necessary for profiling tropospheric CO. Use of unconventional multilayer interference filter designs leads to improvement in CO spectral line correlation compared with the traditional FP multi-order technique, approaching the theoretical performance of gas filter correlation radiometry. In this implementation, however, the gas cell is replaced with a simple, robust solid interference filter. In addition to measuring CO, the correlation filter technique can be applied to measurements of other important gases such as carbon dioxide, nitrous oxide and methane. Imaging the scene onto a 2-D detector array enables a limited range of spectral sampling owing to the field-angle dependence of the filter transmission function. An innovative anamorphic optical system provides a relatively large instrument field-of-view for imaging along the orthogonal direction across the detector array. An important advantage of the IMOFPS concept is that it is a small, low mass and high spectral resolution spectrometer having no moving parts. A small, correlation spectrometer like IMOFPS would be well suited for global observations of CO2, CO, and CH4 from low Earth or regional observations from Geostationary orbit. A prototype instrument is in development for flight demonstration on an airborne platform with potential applications to atmospheric chemistry, wild fire and biomass burning, and chemical dispersion monitoring.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brian R Johnson, Thomas U. Kampe, William B. Cook, Grzegorz Miecznik, Paul C. Novelli, Hilary E. Snell, Jennifer A. Turner-Valle, "Imaging Multi-Order Fabry-Perot Spectrometer (IMOFPS) for spaceborne measurements of CO", Proc. SPIE 5157, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research V, (3 November 2003); doi: 10.1117/12.506147; https://doi.org/10.1117/12.506147
PROCEEDINGS
13 PAGES


SHARE
KEYWORDS
Carbon monoxide

Spectroscopy

Optical filters

Fabry–Perot interferometers

Image filtering

Sensors

Spectral resolution

RELATED CONTENT

Multiple-order staircase etalon spectroscopy
Proceedings of SPIE (May 21 2014)
DLP NIRscan Nano an ultra mobile DLP based near...
Proceedings of SPIE (March 15 2016)
The Short Wavelength Spectrometer for ISO
Proceedings of SPIE (May 01 1986)
Mid-infrared camera without lens (MIRACLE) for SPICA
Proceedings of SPIE (August 05 2010)

Back to Top