Geodetic network design for InSAR: Application to ground deformation monitoring

We propose a novel geodetic network design method for InSAR that determines the minimum number and optimal locations of in situ devices for monitoring a deforming area within desired quality constraints (precision, reliability, economy). From field experiments, the use of low-cost active radar transponders has been validated, and their measurement precision estimated. The proposed design algorithm compares full variance-covariance matrices of estimated parameters at its core, since the dominant InSAR error sources are spatially correlated. Network design can be performed before the actual InSAR measurements are available, given their expected locations, the anticipated deformation signal characteristics, quality description of the observations, and accurate error propagation from the observations to the estimated parameters. Optimal samp ling based on use r requirements ; the criterion matrix is der ived from this Optimality criteria: Precision, reliability and economy 1. Some knowledge of expected deformation 2. (Probable) PS locations 3. PS quality 4. Device precision 5. Optimality criterion Optimal number of added devices and their locations INPUTS