Wavelength calibration of Brewer spectrophotometer using a tunable pulsed laser and implications to the Brewer ozone retrieval
In this contribution we present the wavelength calibration of the travelling reference Brewer spectrometer of the Regional Brewer Calibration Center for Europe (RBCC-E) at PTB in Braunschweig, Germany. The wavelength calibration is needed for the calculation of the ozone absorption coefficients u...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-06-01
|
| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/11/3759/2018/amt-11-3759-2018.pdf |
| Summary: | In this contribution we present the wavelength calibration of the travelling
reference Brewer spectrometer of the Regional Brewer Calibration Center for
Europe (RBCC-E) at PTB in Braunschweig, Germany. The wavelength calibration
is needed for the calculation of the ozone absorption coefficients used by
the Brewer ozone algorithm. In order to validate the standard procedure for
determining Brewer's wavelength scale, a calibration has been performed by
using a tunable laser source at PTB in the framework of the EMRP project
ENV59 ATMOZ <q>Traceability for the total column ozone</q>. Here we compare
these results to those of the standard procedure for the wavelength
calibration of the Brewer instrument. Such a comparison allows validating the
standard methodology used for measuring the ozone absorption coefficient with
respect to several assumptions. The results of the laser-based calibrations
reproduces those obtained by the standard operational methodology and shows
that there is an underestimation of 0.8 % of the ozone absorption
coefficients due to the use of the parametrized slit functions. |
|---|---|
| ISSN: | 1867-1381 1867-8548 |