Atmospheric models, GPS and InSAR measurements of the tropospheric water vapour field over Mount Etna

[1] Dynamic models of atmospheric movement over the Mount Etna volcano are used to calculate the path delays affecting radar caused by variable water vapour in the troposphere. We compare these model results with the equivalent differential radar interferogram generated by two ERS-2 SAR images taken 35 days apart and the water vapour delay retrievals from a network of fourteen GPS stations distributed over the volcano. The atmospheric model delay field agrees wellwith thelong-wavelength spatial differences measured by InSAR and those measured by GPS. INDEX TERMS: 6924 Radio Science: Interferometry; 1243 Geodesy and Gravity: Space geodetic surveys; 3367 Meteorology and Atmospheric Dynamics: Theoretical modeling; 6964 Radio Science: Radio wave propagation; 8499 Volcanology: General or miscellaneous. Citation: Wadge, G., et al., Atmospheric models, GPS and InSAR measurements of the tropospheric water vapour field over Mount Etna, Geophys. Res. Lett., 29(19), 1905, doi:10.1029/2002GL015159, 2002.

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