Physics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.550e...7w&link_type=abstract
Proceedings of the FRINGE 2003 Workshop (ESA SP-550). 1-5 December 2003, ESA/ESRIN, Frascati, Italy. Editor: H. Lacoste. Publish
Physics
Scientific paper
The benefits of applying independent models of atmospheric path effects over volcanoes on differential InSAR-measured ground motion are potentially considerable. The technique that has been developed consists of running a three dimensional mesoscale atmospheric model at high resolution over the volcano to simulate the state of the atmosphere at the time of radar image acquisition. The amounts of water vapou and the resultant wave delays can be calculated along the radar lines of sight. Differencing two models gives the correction field to apply to the interferogram. We illustrate this approach by simulating the delay fields associated with a tandem ERS pair from 5/6 September 1995. The availability of good initialisation data for the models is vital and the quality of the archived data for this purpose is less than ideal. However, the latest generation of operational mesoscale models promises major improvements in the ability to ingest timely data and to represent water phase transitions correctly.
Stevens N. F.
Wadge Geoff
Webley Peter W.
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