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Proceedings Paper

Atmospheric effects on repeat-pass SAR interferometry
Author(s): James D. O'Brien
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Paper Abstract

The results of interferometry experiments utilizing a Ku band synthetic aperture (imaging) radar flying repeat-pass trajectories are described. The radar is equipped with on-board differential GPS, which permits precise control and measurement of flight paths. Additional inertial sensors allow high-bandwidth motion compensation of the SAR images. Interferometric processing of flight data permitted formation of topographic images. However, due to the shallow grazing angles (10 degrees) and propagation through 40 km of atmosphere, phase anomalies were visible which were attributed to atmospheric granularity. This paper examines the phase disturbances visible in repeat-pass interferometric experiments and quantifies the phenomenon in relation to available sources on this subject. The line-of-sight path through the lower atmosphere is significantly longer than in previous satellite interferometric experiments. Data from a series of flights spanning late 1993 and early 1994 are presented, along with topographic radar imagery processed at 4 m resolution.

Paper Details

Date Published: 15 June 1995
PDF: 8 pages
Proc. SPIE 2471, Atmospheric Propagation and Remote Sensing IV, (15 June 1995); doi: 10.1117/12.211941
Show Author Affiliations
James D. O'Brien, Westinghouse Norden Systems (United States)


Published in SPIE Proceedings Vol. 2471:
Atmospheric Propagation and Remote Sensing IV
J. Christopher Dainty, Editor(s)

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