Abstract
This paper presents a rigorous photogrammetric solution to model the uncertainty in the orientation of the Indian Remote Sensing Satellite IRS-1C/1D. These satellites have an on-board system for providing satellite position and orientation. The model utilizes this system information, together with payload geometry and control points, for estimating the uncertainty in orientation of the spacecraft. The attitude is modeled as roll, pitch, yaw bias, and a minimum of two ground control points are required to estimate this bias. Results are presented for 14 (PAN) data sets. The geographic coordinates of control points are obtained from 1:25000 and 1:50000 scale maps published by the Survey of India. The RMSE for all data sets are less than 35 meters; RMSE with GPS observed control points is nine meters. The result of the model with only system level information is also presented. The paper describes the concept, mathematical formulation, and results of the model with analysis.
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