A channel selection method for hyperspectral atmospheric infrared sounders based on layering
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Published:2020-02-10
Issue:2
Volume:13
Page:629-644
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ISSN:1867-8548
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Container-title:Atmospheric Measurement Techniques
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language:en
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Short-container-title:Atmos. Meas. Tech.
Author:
Chang ShujieORCID, Sheng Zheng, Du Huadong, Ge Wei, Zhang Wei
Abstract
Abstract. This study introduces an effective channel selection method for hyperspectral infrared sounders. The method is illustrated for the Atmospheric InfraRed Sounder (AIRS) instrument. The results are as follows. (1) Using the improved channel selection (ICS), the atmospheric retrievable index is more stable, with the value reaching 0.54. The coverage of the weighting functions is more evenly distributed over height with this method. (2) Statistical inversion comparison experiments show that the accuracy of the retrieval temperature, using the improved channel selection method in this paper, is consistent with that of 1D-Var channel selection. In the stratosphere and mesosphere especially, from 10 to 0.02 hPa, the accuracy of the retrieval temperature of our improved channel selection method is improved by about 1 K. The accuracy of the retrieval temperature of ICS is also improved at lower heights. (3) Statistical inversion comparison experiments for four different regions illustrate latitudinal and seasonal variations and better performance of ICS compared to the numerical weather prediction (NWP) channel selection (NCS) and primary channel selection (PCS) methods. The ICS method shows potential for future applications.
Funder
Hunan Provincial Innovation Foundation for Postgraduate
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference38 articles.
1. Aires, F., Schmitt, M., Chedin, A., and Scott, N.: The “weighting smoothing” regularization of MLP for Jacobian stabilization, IEEE. T. Neural. Networks., 10, 1502–1510, https://doi.org/10.1109/72.809096, 1999. 2. Aires, F., Chédin, A., Scott, N. A., and Rossow, W. B.: A regularized neural net approach for retrieval of atmospheric and surface temperatures with the IASI instrument, J. Appl. Meteorol., 41, 144–159, https://doi.org/10.1175/1520-0450(2002)041<0144:ARNNAF>2.0.CO;2, 2002. 3. Aumann, H. H.: Atmospheric infrared sounder on the earth observing system, Optl. Engr., 33, 776–784, https://doi.org/10.1117/12.159325, 1994. 4. Aumann, H. H., Chahine, M. T., Gautier, C., and Goldberg, M.: AIRS/AMSU/HSB on the Aqua mission: design, science objective, data products, and processing systems, IEEE. Trans. GRS., 41, 253–264, https://doi.org/10.1109/TGRS.2002.808356, 2003. 5. Brath, M., Fox, S., Eriksson, P., Harlow, R. C., Burgdorf, M., and Buehler, S. A.: Retrieval of an ice water path over the ocean from ISMAR and MARSS millimeter and submillimeter brightness temperatures, Atmos. Meas. Tech., 11, 611–632, https://doi.org/10.5194/amt-11-611-2018, 2018.
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