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- W1569080046 abstract "Precise orbit determination of satellite is essential process for broad utilization of satellite imagery. The errors of satellite orbit make significant distortions to the result of geometric correction and DEM (Digital Elevation Model) generated by radargrammetry. If accurate ephemeris data from header information of satellite image are available, precise satellite orbit can be determined without control points. If not, satellite orbit must be refined by using the well defined control points. For orbit refinement, the acquisition of sufficient control points is the most tedious and time consuming step and obstacle to near realtime applications, especially for SAR(Synthetic Aperture Radar) imagery. This paper describes orbit refinement method using only a single control point and ephemeris data to resolve the problem and applies the proposed method to RADARSAT-1 images of which ephemeris information is not accurate to directly use for accurate geometric modeling. Geocoding and generation of DEM is performed using the refined orbit by a single control point. For the comparative analysis of accuracy, traditional method using many control points is performed. As a result, the satellite orbit parameters of RADARSAT-1 SAR were accurately determined by only the single control point." @default.
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- W1569080046 date "2005-01-01" @default.
- W1569080046 modified "2023-09-25" @default.
- W1569080046 title "Minimizing the Number of Control Points for Radargrammetry -Focused on RADARSAT-1 SAR Imagery-" @default.
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