A Comparative Evaluation of Optimal Geometric Camera Modelling Options for Airborne and Spaceborne Linear Array Cameras

Multiple variations of the collinearity model have been implemented for spaceborne SPOT and Airborne ASAS imagery.The SPOT model showed better computational stability and achieved sub-pixel misclosures, in some cases at checkpoints.The linear-phi parameter, excluded from some earlier SPOT models, indicated significance and achieved improved performance.A model for airborne ASAS with 15 parameters achieved subpixel accuracy at GCPs only.A model utilising higher order polynomials as additional parameters in the airborne model works well but does not render improved performance.INS measurements at 1Hz showed poor results, proving to be inadequate for the imaging frame rate of 40 frames per second.With increasing GCP coverage, misclosures at GCPs (internal accuracy) approach those at ties points (external accuracy).