여러 위성영상 센서모델의 외부표정요소 추출 정확도 분석

초록

The main objective of the research in this paper is to investigate accuracy of various sensor models developed for satellite images. We define the accuracy of a sensor model in two aspects; the accuracy of bundle adjustments and the accuracy of estimating exterior orientation parameters. Analysis of the first accuracy for each model has been reported by several researchers whereas the second accuracy has not been so. The second accuracy is important as it describes the model's ability to predict satellite orbit and attitude, which has many direct and indirect applications. Analysis was carried out on the traditional collinearity-based sensor models and orbit-based sensor models. Collienarity-based models were originally developed for aerial photos and modified for linear pushbroom-type satellite images. Orbit-based models have been used within satellite communities for satellite control and orbit determination. Models were tested with two EOC scenes and GPS-driven control points. Test results showed that orbit-models produced better estimation of exterior orientation parameters while maintained comparable accuracy on bundle adjustment.