This paper describes the evolution of classic stereo-radargrammetric techniques to the bistatic spaceborne geometry. When a monostatic image and a bistatic one are adopted to form the stereoscopic pair, new relations are needed to define parallax as a function of the peculiar parameters of bistatic surveying geometry. Two models are analyzed to extract parallax difference from radar data: parallax difference estimation from SAR images and parallax difference calculation by exploiting slant-range equations. An error budget of elevation measurement accuracy has been performed, showing that bistatic radargrammetric techniques applied to a spaceborne scenario mission can achieve an error in height measurement adequate for several applications and lower than the one obtained by previous monostatic experiments.
Spaceborne Bistatic Stereo-Radargrammetry
MOCCIA, ANTONIO
2007
Abstract
This paper describes the evolution of classic stereo-radargrammetric techniques to the bistatic spaceborne geometry. When a monostatic image and a bistatic one are adopted to form the stereoscopic pair, new relations are needed to define parallax as a function of the peculiar parameters of bistatic surveying geometry. Two models are analyzed to extract parallax difference from radar data: parallax difference estimation from SAR images and parallax difference calculation by exploiting slant-range equations. An error budget of elevation measurement accuracy has been performed, showing that bistatic radargrammetric techniques applied to a spaceborne scenario mission can achieve an error in height measurement adequate for several applications and lower than the one obtained by previous monostatic experiments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
