Record number :
74661
Title of article :
Acousto-optic measurements of tropospheric nitrogen dioxide column density by solar spectroscopy
Author/Authors :
Cheng، A. Y. S. نويسنده , , Chan، M. H. نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
-5535
From page :
5536
To page :
0
Abstract :
Measurements of column densities of atmospheric gases can be achieved by a solar spectroscopic method that uses differential optical absorption spectroscopy. Because of the scintillation of sunlight intensity in the atmosphere, the variation in intensity will introduce a low-frequency modification of the measured solar spectrum. A spectral capturing-type CCD spectrometer takes milliseconds to capture a solar spectrum, and the effect of sunlight scintillation is negligible. In contrast, without scintillation correction, a scanning-type spectrometer spending minutes to obtain a complete solar spectrum will introduce some amount of errors. We demonstrate an intensitycompensation technique in a scanning-type spectrometer, based on a solid-state acousto-optic tunable filter, for solar spectroscopic measurements.
Keywords :
Metrology , Spectrometers , spectroscopic instrumentation , Optical instruments , Remote sensing , Atmospheric , ocean optics , Air pollution monitoring , instrumentation , Measurement
Journal title :
Applied Optics
Journal title :
Applied Optics
Serial Year :
2005
Link To Document :
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