Interferometric synthetic aperture radar terrain elevation mapping from multiple observations

Conference · Fri Jul 01 04:00:00 EDT 1994

OSTI ID:10161895

Ghiglia, D C; Wahl, D E

All prior interferometric SAR imaging experiments to date dealt with pairwise processing. Simultaneous image collections from two antenna systems or two-pass single antenna collections are processed as interferometric pairs to extract corresponding pixel by pixel phase differences which encode terrain elevation height. The phase differences are wrapped values which must be unwrapped and scaled to yield terrain height. We propose two major classes of techniques that hold promise for robust multibaseline (multiple pair) interferometric SAR terrain elevation mapping. The first builds on the capability of a recently published method for robust weighted and unweighted least-squares phase unwrapping, while the second attacks the problem directly in a maximum likelihood (ML) formulation. We will provide several examples (actual and simulated SAR imagery) that illustrate the advantages and disadvantages of each method.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 10161895
• Report Number(s): SAND--94-0624C; CONF-941090--2; ON: DE94014185; BR: GB0103012
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200
99 GENERAL AND MISCELLANEOUS
990200
ALGORITHMS
COMPLEX TERRAIN
FACILITIES, EQUIPMENT, AND TECHNIQUES
INTERFEROMETRY
LEAST SQUARE FIT
MAPPING
MATHEMATICS AND COMPUTERS
REMOTE SENSING
SYNTHETIC-APERTURE RADAR