S1TBX-SE-9 Baseline refinement for InSAR

Description

Some older SAR satellites (e.g., RADATSAT-1) have low-quality orbital data, which hinders the compensation of topographic phases and vertical wavenumber computation (see S1TBX-SE-24 Vertical wavenumber computation). This leads to a poor estimation of height (which leads to poor geocoding) and line-of-sight deformation. This enhancement will improve baseline estimation based on interferometric data. The main approach[R10] is to find the (parallel and perpendicular) baseline components that minimize the difference between the interferometric phase and the interferogram modeled using a DEM or heights of ground control points (GCPs).Limitations and recommendations:1. If line-of-sight ground deformation manifests itself as legitimate azimuth/range ramps, this effect will leak into the orbit correction.2. It is assumed that orbit data is first estimated using polynomial regression (or spline interpolation).

Environment

None

Status

Assignee

esteban.aguilera

Reporter

Lisa House

Fix versions

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Components

Priority

Major
Configure