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Oxygen Spectroscopy Laser Sounding Instrument for Remote Sensing of Atmospheric Pressure

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Abstract

We report on the progress of a laser sounding instrument using the pressure broadening of spectroscopic absorption lines of the diatomic oxygen A-band to deduce atmospheric pressure.. We have developed a pulsed, frequency-doubled, fiber laser transmitter. There are many uses for this measurement but we are developing it primarily to make a measurement of the dry mixing ratio of CO2. The CO2 measurement can be affected by changes in atmospheric properties such as humiditiy, temperature and pressure. To remove these variances requires measuring a stable, well-mixed gas like Oxygen.

We report on the basic theory behind the instrument, measurements made at a test site at Goddard, review the current state of the instrument and associated technologies and the necessary steps to improve performance.

© 2008 Optical Society of America

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