Details
| Original language | English |
|---|---|
| Article number | e2021GL096732 |
| Journal | Geophysical research letters |
| Volume | 49 |
| Issue number | 5 |
| Publication status | Published - 16 Mar 2022 |
| Externally published | Yes |
Abstract
Accurate tropospheric delays from Numerical Weather Models (NWM) are an important input to space geodetic techniques, especially for precise real-time Global Navigation Satellite Systems, which are indispensable to earthquake and tsunami early warning systems as well as weather forecasting. The NWM-based tropospheric delays are currently provided either site-specific with a limited spatial coverage, or on two-dimensional grids close to the Earth surface, which cannot be used for high altitudes. We introduce a new method of representing NWM-derived tropospheric zenith hydrostatic and wet delays. A large volume of NWM-derived data is parameterized with surface values and additional two or three coefficients for their vertical scaling to heights up to 14 km. A precision of 1–2 mm is achieved for reconstructing delays to the NWM-determined delays at any altitudes. The method can efficiently deliver NWM-derived tropospheric delays to a broader community of space geodetic techniques.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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In: Geophysical research letters, Vol. 49, No. 5, e2021GL096732, 16.03.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Improving the Vertical Modeling of Tropospheric Delay
AU - Wang, Jungang
AU - Balidakis, Kyriakos
AU - Zus, Florian
AU - Chang, Xiao
AU - Ge, Maorong
AU - Heinkelmann, Robert
AU - Schuh, Harald
N1 - Funding information: The authors thank ECMWF for providing the ERA5 data set, the Editor and anonymous reviewers for the valuable comments. Jungang Wang is funded by the Helmholtz OCPC Program (grant no. ZD202121). Kyriakos Balidakis is funded by the Deutsche Forschungsgemeinschaft (DFG) – Project-ID 434617780 – SFB 1464 (TerraQ). Xiao Chang is supported by the China Scholarship Council (grant no. 201703170248). Open access funding enabled and organized by Projekt DEAL. The authors thank ECMWF for providing the ERA5 data set, the Editor and anonymous reviewers for the valuable comments. Jungang Wang is funded by the Helmholtz OCPC Program (grant no. ZD202121). Kyriakos Balidakis is funded by the Deutsche Forschungsgemeinschaft (DFG) – Project?ID 434617780 – SFB 1464 (TerraQ). Xiao Chang is supported by the China Scholarship Council (grant no. 201703170248). Open access funding enabled and organized by Projekt DEAL.
PY - 2022/3/16
Y1 - 2022/3/16
N2 - Accurate tropospheric delays from Numerical Weather Models (NWM) are an important input to space geodetic techniques, especially for precise real-time Global Navigation Satellite Systems, which are indispensable to earthquake and tsunami early warning systems as well as weather forecasting. The NWM-based tropospheric delays are currently provided either site-specific with a limited spatial coverage, or on two-dimensional grids close to the Earth surface, which cannot be used for high altitudes. We introduce a new method of representing NWM-derived tropospheric zenith hydrostatic and wet delays. A large volume of NWM-derived data is parameterized with surface values and additional two or three coefficients for their vertical scaling to heights up to 14 km. A precision of 1–2 mm is achieved for reconstructing delays to the NWM-determined delays at any altitudes. The method can efficiently deliver NWM-derived tropospheric delays to a broader community of space geodetic techniques.
AB - Accurate tropospheric delays from Numerical Weather Models (NWM) are an important input to space geodetic techniques, especially for precise real-time Global Navigation Satellite Systems, which are indispensable to earthquake and tsunami early warning systems as well as weather forecasting. The NWM-based tropospheric delays are currently provided either site-specific with a limited spatial coverage, or on two-dimensional grids close to the Earth surface, which cannot be used for high altitudes. We introduce a new method of representing NWM-derived tropospheric zenith hydrostatic and wet delays. A large volume of NWM-derived data is parameterized with surface values and additional two or three coefficients for their vertical scaling to heights up to 14 km. A precision of 1–2 mm is achieved for reconstructing delays to the NWM-determined delays at any altitudes. The method can efficiently deliver NWM-derived tropospheric delays to a broader community of space geodetic techniques.
UR - http://www.scopus.com/inward/record.url?scp=85126704843&partnerID=8YFLogxK
U2 - 10.1029/2021GL096732
DO - 10.1029/2021GL096732
M3 - Article
VL - 49
JO - Geophysical research letters
JF - Geophysical research letters
SN - 0094-8276
IS - 5
M1 - e2021GL096732
ER -