Acta Geodaetica et Cartographica Sinica ›› 2017, Vol. 46 ›› Issue (3): 332-337.doi: 10.11947/j.AGCS.2017.20160650

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Analysis of Location Accuracy without Ground Control Points of Optical Satellite Imagery

WANG Renxiang1,2, WANG Jianrong1,2, HU Xin1,2   

  1. 1. State Key Laboratory of Geo-Information Engineering, Xi'an 710054, China;
    2. Xi'an Institute of Surveying and Mapping, Xi'an 710054, China
  • Received:2016-12-21 Revised:2017-02-07 Online:2017-03-20 Published:2017-04-11

Abstract: There are two photography modes in optical satellite photogrammetry, including global continuous coverage and local area coverage, and each photography mode has its own characteristics about application and way to realize location accuracy without ground control points (GCPs). In this paper, the location accuracy without GCPs of typical satellite is introduced, and the key technical in bundle adjustment is described. Finally, the simulation experments are performed about location accuracy without GCPs using forward intersection and bundle adjustment. The results are shown: the attitude accuracy of exterior orientation elements is key factor to affect the location accuracy without GCPs, while the image resolution has little effect. When attitude accuracy of exterior orientation elements exceeds 0.5, the location accuracy without GCPs using bundle adjustment with 5 m resolution is better than it using forward intersection with 0.5 m resolution.

Key words: satellite photogrammetry, global continuous coverage, local area coverage, camera parameters calibration, bundle adjustment, location accuracy

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