 |
| Titel |
On the accuracy of integrated water vapor observations and the potential for mitigating electromagnetic path delay error in InSAR |
| VerfasserIn |
D. Cimini, N. Pierdicca, E. Pichelli, R. Ferretti, V. Mattioli, S. Bonafoni, M. Montopoli, D. Perissin |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1867-1381
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 5, no. 5 ; Nr. 5, no. 5 (2012-05-10), S.1015-1030 |
| Datensatznummer |
250002862
|
| Publikation (Nr.) |
 copernicus.org/amt-5-1015-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| A field campaign was carried out in the framework of the Mitigation of
Electromagnetic Transmission errors induced by Atmospheric Water Vapour
Effects (METAWAVE) project sponsored by the European Space Agency (ESA) to
investigate the accuracy of currently available sources of atmospheric
columnar integrated water vapor measurements. The METAWAVE campaign took
place in Rome, Italy, for the 2-week period from 19 September to 4 October
2008. The collected dataset includes observations from ground-based
microwave radiometers and Global Positioning System (GPS) receivers, from
meteorological numerical model analysis and predictions, from balloon-borne
in-situ radiosoundings, as well as from spaceborne infrared radiometers. These
different sources of integrated water vapor (IWV) observations have been
analyzed and compared to quantify the accuracy and investigate the potential
for mitigating IWV-related electromagnetic path delay errors in
Interferometric Synthetic Aperture Radar (InSAR) imaging. The results, which
include a triple collocation analysis accounting for errors inherently
present in every IWV measurements, are valid not only to InSAR but also to
any other application involving water vapor sensing. The present analysis
concludes that the requirements for mitigating the effects of turbulent
water vapor component into InSAR are significantly higher than the accuracy
of the instruments analyzed here. Nonetheless, information on the IWV
vertical stratification from satellite observations, numerical models, and
GPS receivers may provide valuable aid to suppress the long spatial
wavelength (>20 km) component of the atmospheric delay, and thus
significantly improve the performances of InSAR phase unwrapping techniques. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|