Accuracy Improvements in the Orientation of ALOS PRISM Images Using IOP Estimation and UCL Kepler Platform Model

Abstract

This paper presents a study that was conducted to determine the orientation of ALOS (Advanced Land Observing Satellite) PRISM (Panchromatic Remote-sensing Instrument for Stereo Mapping) triplet images, considering the estimation of interior orientation parameters (IOP) of the cameras and using the collinearity equations with the UCL (University College of London) Kepler platform model, which was adapted to use coordinates referenced to the Terrestrial Reference System ITRF97. The results of the experiments showed that the accuracies of 3D coordinates calculated using 3D photogrammetric intersection increased when the IOP were also estimated. The vertical accuracy was significantly better than the horizontal accuracy. The usability of the estimated IOP was tested to perform the bundle block adjustments of another neighbouring PRISM image triplet. The results in terms of 3D photogrammetric intersection were satisfactory and were close to those obtained in the IOP estimation experiment.

A Novel Model for Orientation of Linear Optical Satellite Images Based in the Adaptation of the Orbit-Attitude Model

“…Thus, before the orientation, the coordinates of Ground Control Points (GCPs) and Check Points (CPs), obtained originally in a TRS, must be transformed to coordinates referred to a GCRS. In order to avoid this procedure, Rodrigues et al (2017) modified the original UCL Kepler platform model for the use of Two-bodies problem in a TRS, inserting term in function of angular velocity of Earth's rotation. Once the time interval for obtaining the HRC-CBERS-2B images is relatively small (~ 4s), the components of Precession, Nutation and pole displacement can be disregarded without prejudice.…”

“…Once the time interval for obtaining the HRC-CBERS-2B images is relatively small (~ 4s), the components of Precession, Nutation and pole displacement can be disregarded without prejudice. More details about the mathematical development can be seen in Leick (2004) and Rodrigues et al (2017). In this research this model is going to called Modified UCL Kepler platform model.…”

“…The platform model developed by the authors was called Kepler model and posteriorly UCL Kepler model (Michalis and Dowman 2008). Since the UCL Kepler platform model was developed to use coordinates referenced to the Geocentric Celestial Reference System (GCRS), Rodrigues et al (2017) proposed a methodology for the use of coordinates referenced to a TRS. In this research, this platform model is going to called Modified UCL Kepler platform model.…”