Insar Mission-Level Products on Demand - do we Need Range-Doppler?

InSAR time series analysis of deformation fields, a goal of many modern radar systems, almost always starts with processed range-Doppler single look complex (SLC) radar images. These images are precisely coregistered and pairwise phase differences form the interferograms. Computing coregistered SLCs directly in a desired geometry saves significant data storage and readily produces data products that are easy to analyze in coordinate systems that are well matched to a desired application. Here we demonstrate InSAR data products created using a backprojection algorithm that skips the range- Doppler, coregistration, and elevation compensation steps. Implementing this in an on-demand system saves not only on the volume of products that must be computed, stored, and delivered, it further greatly simplifies analysis by the end user and opens up InSAR techniques to a wider group of applications.