Aircraft laser infrared absorption spectrometer (ALIAS) for polar ozone studies
The ALIAS instrument is a very high resolution (0.0003/cm) scanning, tunable diode laser spectrometer designed to make direct, simultaneous measurements of NO2, HNO3, HCl, CH4, and either O3 or N2O (including vertical profiles of CH4 and N2O) in the polar stratosphere at sub-part-per-billion level s...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19930054399 2023-05-15T15:03:27+02:00 Aircraft laser infrared absorption spectrometer (ALIAS) for polar ozone studies Webster, C. R. May, R. D. Unclassified, Unlimited, Publicly available 1991 http://ntrs.nasa.gov/search.jsp?R=19930054399 unknown http://ntrs.nasa.gov/search.jsp?R=19930054399 Accession ID: 93A38396 Copyright Other Sources 35 In: Infrared technology XVII; Proceedings of the Meeting, San Diego, CA, July 22-26, 1991 (A93-38376 15-35); p. 187-194. 1991 ftnasantrs 2012-02-15T20:08:36Z The ALIAS instrument is a very high resolution (0.0003/cm) scanning, tunable diode laser spectrometer designed to make direct, simultaneous measurements of NO2, HNO3, HCl, CH4, and either O3 or N2O (including vertical profiles of CH4 and N2O) in the polar stratosphere at sub-part-per-billion level sensitivities over integration times from 3 to 30 s. Unique features include a sample inlet/throttle system designed to achieve near-isokinetic sampling, in PSC events, an in-flight wavelength reference cell rack, mechanical fringe-spoilers, a four-laser/four-detector dewar with 24-hr hold-time operating at a fixed temperature without electrical regulation, and in-flight fast correlation routines for spectral drift compensation prior to spectral addition. Instrument design and test flight results are discussed in the light of ALIAS's role in the Winter 1991 Arctic aircraft stratospheric ozone campaigns out of Fairbanks, Alaska, and Bangor, Maine. Other/Unknown Material Arctic Alaska NASA Technical Reports Server (NTRS) Arctic Dewar ENVELOPE(-21.158,-21.158,-80.534,-80.534) Fairbanks |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
35 |
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35 Webster, C. R. May, R. D. Aircraft laser infrared absorption spectrometer (ALIAS) for polar ozone studies |
topic_facet |
35 |
description |
The ALIAS instrument is a very high resolution (0.0003/cm) scanning, tunable diode laser spectrometer designed to make direct, simultaneous measurements of NO2, HNO3, HCl, CH4, and either O3 or N2O (including vertical profiles of CH4 and N2O) in the polar stratosphere at sub-part-per-billion level sensitivities over integration times from 3 to 30 s. Unique features include a sample inlet/throttle system designed to achieve near-isokinetic sampling, in PSC events, an in-flight wavelength reference cell rack, mechanical fringe-spoilers, a four-laser/four-detector dewar with 24-hr hold-time operating at a fixed temperature without electrical regulation, and in-flight fast correlation routines for spectral drift compensation prior to spectral addition. Instrument design and test flight results are discussed in the light of ALIAS's role in the Winter 1991 Arctic aircraft stratospheric ozone campaigns out of Fairbanks, Alaska, and Bangor, Maine. |
format |
Other/Unknown Material |
author |
Webster, C. R. May, R. D. |
author_facet |
Webster, C. R. May, R. D. |
author_sort |
Webster, C. R. |
title |
Aircraft laser infrared absorption spectrometer (ALIAS) for polar ozone studies |
title_short |
Aircraft laser infrared absorption spectrometer (ALIAS) for polar ozone studies |
title_full |
Aircraft laser infrared absorption spectrometer (ALIAS) for polar ozone studies |
title_fullStr |
Aircraft laser infrared absorption spectrometer (ALIAS) for polar ozone studies |
title_full_unstemmed |
Aircraft laser infrared absorption spectrometer (ALIAS) for polar ozone studies |
title_sort |
aircraft laser infrared absorption spectrometer (alias) for polar ozone studies |
publishDate |
1991 |
url |
http://ntrs.nasa.gov/search.jsp?R=19930054399 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-21.158,-21.158,-80.534,-80.534) |
geographic |
Arctic Dewar Fairbanks |
geographic_facet |
Arctic Dewar Fairbanks |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19930054399 Accession ID: 93A38396 |
op_rights |
Copyright |
_version_ |
1766335298585755648 |