Dependence of P-band Interferometric Height on Forest Parameters from Simulation and Observation

GeoSAR is a unique dual-band, interferometric SAR (DBInSAR) sensor capable of collecting single-pass, Xband (VV) and P-band (HH) interferometric data simultaneously. In this paper we examine the dependence of the P-band HH interferometric phase centre height upon forest and terrain parameters. We develop a simple model for P-band GeoSAR observations, and use the model to show how the elevation in P-band HH phase centre height above true ground height is related to the volume-to-ground scattering ratio. GeoSAR is not fully-polarimetric, but records cross-polar (HV) returns at P-band (although not interferometrically). We conjecture that these returns are dominated by direct-volume scattering and related to the direct-volume HH backscatter. We use this relationship to model the dependence of the P-band HH DTM height upon the HV/HH ratio, and the difference in X-band DEM with P-band DTM heights. The relationships are examined using simulated forest InSAR data, and a model is proposed for...

• Type: Journal
• Year: 2009
• Where: IGARSS
• Authors: Marco Lavalle, Mark L. Williams, Scott Hensley, Eric Pottier, Domenico Solimini
• Keywords: Centre Height, Dtm Heights, IGARSS 2009, P-band HH, Remote Sensing