Analysis of the application of the optical method to the measurements of the water vapor content in the atmosphere – Part 1: Basic concepts – the measurements of the water vapor content in the atmosphere with the optical method-Reference-Cited by-同舟云学术

Analysis of the application of the optical method to the measurements of the water vapor content in the atmosphere – Part 1: Basic concepts – the measurements of the water vapor content in the atmosphere with the optical method

Published:2010-12-15 Issue: Volume: Page:
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Galkin V. D.,Immler F.,Alekseeva G. A.,Berger F.-H.,Leiterer U.,Naebert T.,Nikanorova I. N.,Novikov V. V.,Pakhomov V. P.,Sal'nikov I. B.

Abstract

Abstract. We retrieved the total content of the atmospheric water vapor from extensive sets of photometric data obtained since 1995 at Lindenberg Meteorological Observatory with star and sun photometers. Different methods of determination of the empirical parameters that are necessary for the retrieval are discussed. The instruments were independently calibrated using laboratory measurements made at Pulkovo Observatory with the VKM-100 multi-pass vacuum cell. The empirical parameters were also calculated by the simulation of the atmospheric absorption by water vapor, using the MODRAN-4 program package for different model atmospheres. The results are compared to those presented in the literature, obtained with different instruments and methods of the retrieval. The accuracy of the empirical parameters used for the power approximation that links the water vapor content with the observed absorption is analyzed. Currently, the calibration and measurement errors yield the uncertainty of about 10% in the total column water vapor. We discuss the possibilities for improving the accuracy of calibration to ~1%, which will make it possible to use data obtained by optical photometry as an independent reference for other methods (GPS, lidar, etc).

Publisher

Copernicus GmbH

Link

https://amt.copernicus.org/preprints/3/5705/2010/amtd-3-5705-2010.pdf

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