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Title: A 3-D SAR approach to IFSAR processing

Interferometric SAR (IFSAR) can be shown to be a special case of 3-D SAR image formation. In fact, traditional IFSAR processing results in the equivalent of merely a super-resolved, under-sampled, 3-D SAR image. However, when approached as a 3-D SAR problem, a number of IFSAR properties and anomalies are easily explained. For example, IFSAR decorrelation with height is merely ordinary migration in 3-D SAR. Consequently, treating IFSAR as a 3-D SAR problem allows insight and development of proper motion compensation techniques and image formation operations to facilitate optimal height estimation. Furthermore, multiple antenna phase centers and baselines are easily incorporated into this formulation, providing essentially a sparse array in the elevation dimension. This paper shows the Polar Format image formation algorithm extended to 3 dimensions, and then proceeds to apply it to the IFSAR collection geometry. This suggests a more optimal reordering of the traditional IFSAR processing steps.
Authors:
;
Publication Date:
OSTI Identifier:
752100
Report Number(s):
SAND99-2400C
TRN: AH200018%%442
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Aerosense 2000, Algorithms for Synthetic Aperture Radar Imagery VII (or48), Orlando, FL (US), 04/24/2000--04/28/2000; Other Information: PBD: 1 Mar 2000
Research Org:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; RADAR; IMAGES; IMAGE PROCESSING; MOTION; HEIGHT; ALGORITHMS; INTERFEROMETRY; IFSAR; INTERFEROMETRY: FINE RESOLUTION; 3-D; POLAR FORMAT