Elimination of across-track phase components in airborne along-track interferometry data to improve object velocity measurements
Abstract- The phase differences in airborne along-track interferometry can be used
to calculate radial velocities of moving objects. This paper deals with the problem
to preprocess phase and intensity data of along-track interferometry with the aim
to determine velocities of slow moving objects. The phase information is often severely
disturbed by quite different reasons. Beside the problem of noise sensitivity of
interferometric measurements in airborne measurements additionally an unwanted across-track
component could lead to systematic phase errors. We propose a first order correction of the
along-track phase values by subtracting a plane which is fitted into phase values.
In case of a flat scene this correction complies a 'flat earth' correction of the phase.
The described process was applied to a scene with slow moving cargo ships
Schulz K, Soergel U, Thoennessen U, Stilla U (2003)
Elimination of across-track phase components in airborne along-track
interferometry data to improve object velocity measurements.
[ Stilla.de/pub ]