Mapping temporal evolution of water vapour in troposphere by interferometric SAR data

Pedro Mateus; Giovanni Nico; João Catalão

doi:10.1117/12.864727

26 October 2010 Mapping temporal evolution of water vapour in troposphere by interferometric SAR data

Pedro Mateus, Giovanni Nico, João Catalão

Proceedings Volume 7827, Remote Sensing of Clouds and the Atmosphere XV; 782712 (2010) https://doi.org/10.1117/12.864727
Event: SPIE Remote Sensing, 2010, Toulouse, France

Abstract

A methodology is presented to derive a time series of Precipitable Water Vapour (PWV) maps from interferometric Synthetic Aperture Radar (SAR) data. Generally, information on PWV spatial distribution provided by SAR interferomeetry (InSAR), even if characterized by a high spatial resolution, is updated with a temporal frequency depending the satellite revisiting cycle of the InSAR sensor. The methodology is based on the use of independent GPS measurements of PWV to set the unknown bias resulting from the unwrapping process in each unwrapped interferometric phase. The main advantage of this methodology is that calibrated PWV maps can be derived from each stack of SAR interferograms. This allows the merging of PWV time series obtained over the same area by different SAR sensors and along different satellite orbits. As a result, the updating frequency is reduced from the satellite revisitng cycle to a few days.

Citation Download Citation

Pedro Mateus, Giovanni Nico, and João Catalão "Mapping temporal evolution of water vapour in troposphere by interferometric SAR data", Proc. SPIE 7827, Remote Sensing of Clouds and the Atmosphere XV, 782712 (26 October 2010); https://doi.org/10.1117/12.864727

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