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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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Atmos. Meas. Tech., 10, 537-548, 2017
https://doi.org/10.5194/amt-10-537-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
14 Feb 2017
Combining Meteosat-10 satellite image data with GPS tropospheric path delays to estimate regional integrated water vapor (IWV) distribution
Anton Leontiev1 and Yuval Reuveni2,3,4 1Department of Electrical Engineering, Ariel University, Ariel, Israel
2Department of Mechanical Engineering & Mechatronics, Ariel University, Ariel, Israel
3Eastern R&D Center, Ariel, Israel
4School of Sustainability, Interdisciplinary Center (IDC) Herzliya, Herzliya, Israel
Abstract. Using GPS satellites signals, we can study different processes and coupling mechanisms that can help us understand the physical conditions in the lower atmosphere, which might lead or act as proxies for severe weather events such as extreme storms and flooding. GPS signals received by ground stations are multi-purpose and can also provide estimates of tropospheric zenith delays, which can be converted into accurate integrated water vapor (IWV) observations using collocated pressure and temperature measurements on the ground. Here, we present for the first time the use of Israel's dense regional GPS network for extracting tropospheric zenith path delays combined with near-real-time Meteosat-10 water vapor (WV) and surface temperature pixel intensity values (7.3 and 10.8 µm channels, respectively) in order to assess whether it is possible to obtain absolute IWV (kg m−2) distribution. The results show good agreement between the absolute values obtained from our triangulation strategy based solely on GPS zenith total delays (ZTD) and Meteosat-10 surface temperature data compared with available radiosonde IWV absolute values. The presented strategy can provide high temporal and special IWV resolution, which is needed as part of the accurate and comprehensive observation data integrated in modern data assimilation systems and is required for increasing the accuracy of regional numerical weather prediction systems forecast.

Citation: Leontiev, A. and Reuveni, Y.: Combining Meteosat-10 satellite image data with GPS tropospheric path delays to estimate regional integrated water vapor (IWV) distribution, Atmos. Meas. Tech., 10, 537-548, https://doi.org/10.5194/amt-10-537-2017, 2017.
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Short summary
Here we present the use of GPS tropospheric zenith path delays combined with METEOSAT-10 water vapor (WV) and surface temperature pixel intensity values in order to obtain absolute integrated water vapor map distribution. The results show good agreement between the suggested strategies compared with available radiosonde precipitable water vapor absolute values. This can provide unprecedented WV temporal and special distribution, which can be used as accurate initial conditions in weather models.
Here we present the use of GPS tropospheric zenith path delays combined with METEOSAT-10 water...
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