Multi- Wavelength Phase Unwrapping Method

The joint application of multi wavelength interferometric synthetic aperture radar data can improve the accuracy and reliability of DEM. Shorter wavelength interferometric synthetic aperture radar data can obtain more accurate elevation information, while longer wavelength interferometric synthetic aperture radar data can obtain elevation information with larger elevation spans between adjacent pixels. A multi-wavelength synthetic aperture radar (SAR) interferogram simulation algorithm has been proposed to study multi-wavelength synthetic aperture radar (SAR) interferometry techniques. This method is based on a ground point imaging model and applies formulas to establish the relationship between pixels and ground points. The interference phase at different wavelengths was calculated using an iterative method. Experiments were conducted using DEM generated by commercial digital software simulation, successfully simulating interferograms at different wavelengths.