Influence of ionospheric electron density fluctuations on satellite radar interferometry

Evidence is presented that auroral zone ionospheric disturbances can influence satellite radar interferometry (SRI) obtained with the RADARSAT, ERS and JERS‐1 satellites. Fluctuations in ionospheric electron density can lead to an azimuth shift modulation in synthetic aperture radar (SAR) imagery, w...

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Bibliographic Details
Published in:Geophysical research letters 2000-05, Vol.27 (10), p.1451-1454
Main Authors: Gray, A. Laurence, Mattar, Karim E., Sofko, George
Format: Article
Language:English
Subjects:
Auroral zones
Azimuth
Earth, ocean, space
Exact sciences and technology
External geophysics
Fluctuation
Ionospheric disturbances
Ionospheric electron density
Modulation
Physics of the ionosphere
Satellites
Synthetic aperture radar
Wave propagation
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Summary:Evidence is presented that auroral zone ionospheric disturbances can influence satellite radar interferometry (SRI) obtained with the RADARSAT, ERS and JERS‐1 satellites. Fluctuations in ionospheric electron density can lead to an azimuth shift modulation in synthetic aperture radar (SAR) imagery, which can be detected using SRI. Measurements of azimuth shift in SRI can help to differentiate ionospheric from tropospheric propagation problems, and to understand better the impact of the ionosphere on spaceborne SAR. Further, SRI azimuth shift modulation may be useful in mapping patterns of polar auroral zone ionospheric disturbances over large distances.
ISSN:0094-8276
1944-8007
DOI:10.1029/2000GL000016