Geometric Understanding of Space-borne Optical Sensors Biases and Effects on the Ground

Abstract The accurate internal values, positions, and attitudes of the earth observation sensors should be known in terms of achieving precise location information of the objects on the ground. In this regard, this paper analyzes the effect of the internal orientation parameter bias of the sensor, especially, along-track line scanner, on the quality of the reconstructed object space. Synthetic dataset is produced based on the reasonable flight trajectories and attitudes of along track line scanner. Then, it is utilized for the various experiments while changing the altitudes of the scanner and ways of the georeferencing. Conclusively, the results show that in the case of the indirect geo-referencing, Interior Orientation Parameters(IOPs) bias does not play a crucial role when determining the object’s threedimensional coordinates. However, in case of the direct geo-referencing, IOP bias causes significant errors on the coordinates of the objects.