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Alternate abstract:
The transmission photogrammetric satellite with global coverage on a continuous basis belongs to dynamic photography, and the location without ground control points (GCPs) can-not reach to the level of the frame imagery. In this paper, the location without GCPs is researched in-depth about 3th satellite, based on the existing research results of TH-1. In order to counteract the negative effect of small width-to-height ratio (ratio of satellite strip photographic coverage width to satellite orbital height), the additional corrections of interior orientation elements were performed during the on-orbit calibration. As a result, the systematic errors were reduced while the horizontal location accuracy was improved, and the location accuracy without GCPs have achieved to 3.7 m (horizontal accuracy) and 2.4 m (vertical elevation accuracy) using foreign testing field. The location without GCPs of a single strip satellite imagery with global coverage on a continuous basis can be improved to the theoretical level by using its GNSS receiver, star tracker and domestic calibration results of camera parameters.
