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  Opportunistic constant target matching—a new method for satellite intercalibration

Buehler, S., Prange, M., Mrziglod, J., John, V., Burgdorf, M., & Lemke, O. (2020). Opportunistic constant target matching—a new method for satellite intercalibration. Earth and Space Science, 7: e2019EA000856. doi:10.1029/2019EA000856.

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2019EA000856.pdf (Publisher version), 4MB
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 Creators:
Buehler, S.A.1, Author
Prange , Marc1, 2, Author
Mrziglod, J., Author
John, V.O., Author
Burgdorf, M., Author
Lemke, O., Author
Affiliations:
1Meteorologisches Institut, Universität Hamburg, ou_persistent22              
2IMPRS on Earth System Modelling, MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_913547              

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Free keywords: brightness temperature; calibration; humidity; methodology; Monte Carlo analysis; nadir; NOAA satellite; satellite altimetry; sensor; SEVIRI; simulation; troposphere
 Abstract: Opportunistic constant target matching is a new method for satellite intercalibration. It solves a long-standing issue with the traditional simultaneous nadir overpass (SNO) method, namely, that it typically provides only data points with cold brightness temperatures for humidity sounding instruments on sun-synchronous satellites. In the new method, a geostationary infrared sensor (SEVIRI) is used to select constant target matches for two different microwave sensors (MHS on NOAA 18 and Metop A). We discuss the main assumptions and limitations of the method and explore its statistical properties with a simple Monte Carlo simulation. The method was tested in a simple case study with real observations for this combination of satellites for MHS Channel 3 at 183 ± 1 GHz, the upper tropospheric humidity channel. For the studied 3-month test period, real observations are found to behave consistently with the simulations, increasing our confidence that the method can be a valuable tool for intercalibration efforts. For the selected case study, the new method confirms that the bias between NOAA 18 and Metop A MHS Channel 3 is very small, with absolute value below 0.05 K. ©2020. The Authors.

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Language(s): eng - English
 Dates: 2020-032020-04-142020-05
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2019EA000856
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Title: Earth and Space Science
Source Genre: Journal
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Publ. Info: Wiley-Blackwell Publishing Ltd
Pages: - Volume / Issue: 7 Sequence Number: e2019EA000856 Start / End Page: - Identifier: ISSN: 23335084