Evaluation of an interference filter photometer for the measurement of atmospheric ozone and aerosol scattering
A multi-wavelength, narrow-band, interference filter spectrophotometer has been designed by the New Zealand Meteorological Service. Its intended function is to provide measurements of atmospheric transmission at ultraviolet, visible, and infrared wavelengths, and from these measurements be able to c...
Main Author: | |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
University of Canterbury. Physics
1989
|
Subjects: | |
Online Access: | https://dx.doi.org/10.26021/6411 https://ir.canterbury.ac.nz/handle/10092/8239 |
id |
ftdatacite:10.26021/6411 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.26021/6411 2023-05-15T13:35:41+02:00 Evaluation of an interference filter photometer for the measurement of atmospheric ozone and aerosol scattering Wood, Stephen Wyatt 1989 https://dx.doi.org/10.26021/6411 https://ir.canterbury.ac.nz/handle/10092/8239 unknown University of Canterbury. Physics Copyright Stephen Wyatt Wood https://canterbury.libguides.com/rights/theses CreativeWork article 1989 ftdatacite https://doi.org/10.26021/6411 2021-11-05T12:55:41Z A multi-wavelength, narrow-band, interference filter spectrophotometer has been designed by the New Zealand Meteorological Service. Its intended function is to provide measurements of atmospheric transmission at ultraviolet, visible, and infrared wavelengths, and from these measurements be able to characterise the aerosol scattering optical depth as a function of wavelength and determine the total amount of ozone in a vertical column of the atmosphere. The design was prompted by the similarity of conventional sun photometers to the photometers built at the University of Canterbury, New Zealand, solely for the measurement of total ozone. The instrument has been built to this design by the Physics Department, University of Canterbury, and has been tested and evaluated by the author. The photometer has eleven filters with bandpasses in the range from 310 nm to 940 nm. The bandwidths are 5 nm in the ultraviolet and 10 nm elsewhere. The three shortest wavelength filters lie in the Huggins absorption band of ozone and are to provide an estimate of the quantity of atmospheric ozone. The remaining filters are principally at wavelengths intended for the measurement of aerosol optical depth. The filter at 940 nm is for the determination of the quantity of water vapour in the atmosphere. Two detectors are used to cover the range of wavelengths. The photometer tracks the sun by means of a heliostat. A description of the photometer and the measurements made with it in New Zealand and the Antarctic are presented. These show that this is a design that comes close to meeting its objective. Despite the set back of one of the important ultraviolet filters changing in transmission characteristic, the instrument can still provide approximate values for ozone. The systematic errors in these values are discussed. The values it gives for aerosol optical depth show the varying wavelength dependence of aerosol scattering. The specific problems that limit both the accuracy of the measurements and the range over which they can be made are identified and possible solutions are suggested. Article in Journal/Newspaper Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic New Zealand Huggins ENVELOPE(162.483,162.483,-78.283,-78.283) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
description |
A multi-wavelength, narrow-band, interference filter spectrophotometer has been designed by the New Zealand Meteorological Service. Its intended function is to provide measurements of atmospheric transmission at ultraviolet, visible, and infrared wavelengths, and from these measurements be able to characterise the aerosol scattering optical depth as a function of wavelength and determine the total amount of ozone in a vertical column of the atmosphere. The design was prompted by the similarity of conventional sun photometers to the photometers built at the University of Canterbury, New Zealand, solely for the measurement of total ozone. The instrument has been built to this design by the Physics Department, University of Canterbury, and has been tested and evaluated by the author. The photometer has eleven filters with bandpasses in the range from 310 nm to 940 nm. The bandwidths are 5 nm in the ultraviolet and 10 nm elsewhere. The three shortest wavelength filters lie in the Huggins absorption band of ozone and are to provide an estimate of the quantity of atmospheric ozone. The remaining filters are principally at wavelengths intended for the measurement of aerosol optical depth. The filter at 940 nm is for the determination of the quantity of water vapour in the atmosphere. Two detectors are used to cover the range of wavelengths. The photometer tracks the sun by means of a heliostat. A description of the photometer and the measurements made with it in New Zealand and the Antarctic are presented. These show that this is a design that comes close to meeting its objective. Despite the set back of one of the important ultraviolet filters changing in transmission characteristic, the instrument can still provide approximate values for ozone. The systematic errors in these values are discussed. The values it gives for aerosol optical depth show the varying wavelength dependence of aerosol scattering. The specific problems that limit both the accuracy of the measurements and the range over which they can be made are identified and possible solutions are suggested. |
format |
Article in Journal/Newspaper |
author |
Wood, Stephen Wyatt |
spellingShingle |
Wood, Stephen Wyatt Evaluation of an interference filter photometer for the measurement of atmospheric ozone and aerosol scattering |
author_facet |
Wood, Stephen Wyatt |
author_sort |
Wood, Stephen Wyatt |
title |
Evaluation of an interference filter photometer for the measurement of atmospheric ozone and aerosol scattering |
title_short |
Evaluation of an interference filter photometer for the measurement of atmospheric ozone and aerosol scattering |
title_full |
Evaluation of an interference filter photometer for the measurement of atmospheric ozone and aerosol scattering |
title_fullStr |
Evaluation of an interference filter photometer for the measurement of atmospheric ozone and aerosol scattering |
title_full_unstemmed |
Evaluation of an interference filter photometer for the measurement of atmospheric ozone and aerosol scattering |
title_sort |
evaluation of an interference filter photometer for the measurement of atmospheric ozone and aerosol scattering |
publisher |
University of Canterbury. Physics |
publishDate |
1989 |
url |
https://dx.doi.org/10.26021/6411 https://ir.canterbury.ac.nz/handle/10092/8239 |
long_lat |
ENVELOPE(162.483,162.483,-78.283,-78.283) |
geographic |
Antarctic The Antarctic New Zealand Huggins |
geographic_facet |
Antarctic The Antarctic New Zealand Huggins |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_rights |
Copyright Stephen Wyatt Wood https://canterbury.libguides.com/rights/theses |
op_doi |
https://doi.org/10.26021/6411 |
_version_ |
1766068826314637312 |