On the use of COSMO-SkyMed SAR data and Numerical Weather Models for interferometric DEM generation
Nitti, D. O. ; Nutricato, R. ; Intini, F. ; ...Vespe, F.
Jul - 2012
DOI: 10.1109/IGARSS.2012.6350551
ISSN : 2153-6996 ; ISBN : 978-1-4673-1159-5

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type: Conference Proceedings

Abstract
The present study is aimed at investigating the potentialities of the COSMO/SkyMed (CSK) constellation for ground elevation measurement with particular attention devoted to the impact of the improved spatial resolution wrt the previous SAR sensors. Assuming no movement and successful orbital error removal, the main problem in height computation through InSAR techniques derives from the interferometric phase artifacts related to the interaction between microwave and the lower layers of the atmosphere (APS, Atmospheric Phase Screen). Different strategies can be adopted to filter out this signal, ranging from the exploitation of the well-known spatial and temporal statistics of the APS to the estimation of independent APS measurements through Numerical Weather Prediction (NWP) models. Their feasibility and the achievable accuracies are discussed here.

keywords : APS spatial statistics,APS temporal statistics,Atmospheric measurements,Atmospheric modeling,COSMO-SKYMED SAR data,COSMO-SkyMed constellation,COSMO/SkyMed,GPS ZTD,InSAR techniques,Interferometry,Meteorology,NWP models,Numerical Weather Model,Numerical models,SAR Interferometry,SAR sensors,Spatial resolution,Synthetic aperture radar,digital elevation models,ground elevation measurement,interferometric DEM generation,interferometric phase artifacts,numerical weather models,numerical weather prediction,orbital error removal,remote sensing by radar,weather forecasting