期刊
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
卷 54, 期 2, 页码 697-702出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TGRS.2015.2463263
关键词
Atmosphere; Global Positioning System (GPS); GPS tomography; interferometric synthetic aperture radar (InSAR); numerical weather model (NWM); precipitable water vapor (PWV); synthetic aperture radar (SAR)
类别
资金
- Portuguese Science Foundation (FCT) [SFRH/BD/80288/2011]
- Project SMOG [PTDC/CTE-ATM/119922/2010]
- FCT
- Consiglio Nazionale delle Ricerche (CNR)
- Short-Term Mobility CNR Program
- Fundação para a Ciência e a Tecnologia [SFRH/BD/80288/2011] Funding Source: FCT
The integration of interferometric synthetic aperture radar (InSAR) and GPS tomography techniques for the estimation of the 3-D distribution of atmosphere refractivity is discussed. A methodology to use the maps of the temporal changes of precipitable water vapor (PWV) provided by InSAR as a further constraint in the GPS tomography is described. The aim of the methodology is to increase the accuracy of the GPS tomography reconstruction of the atmosphere's refractivity. The results, which are obtained with SAR and GPS data acquired over the Lisbon area, Portugal, are presented and assessed. It has been found that the reconstruction of the atmospheric refractivity is closer to the real atmospheric state with a mitigation of the smoothing effects due to the usual geometrical constraints of the GPS tomography.
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