Acta Geodaetica et Cartographica Sinica ›› 2015, Vol. 44 ›› Issue (2): 135-141.doi: 10.11947/j.AGCS.2015.20130213

Previous Articles     Next Articles

Adjustment Criterion and Algorithm in Adjustment Model with Uncertain

SONG Yingchun, XIE Xuemei, CHEN Xiaoling   

  1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
  • Received:2014-03-21 Revised:2014-10-27 Online:2015-02-20 Published:2015-02-14
  • Supported by:
    Open Research Fund of State Key Laboratory of Geography Information Engineering(No.SKLGIE 2013-M-2-5);China Postdoctoral Science Foundation(No.2013M540641)

Abstract: Uncertainty often exists in the process of obtaining measurement data, which affects the reliability of parameter estimation. This paper establishes a new adjustment model in which uncertainty is incorporated into the function model as a parameter. A new adjustment criterion and its iterative algorithm are given based on uncertainty propagation law in the residual error, in which the maximum possible uncertainty is minimized. This paper also analyzes, with examples, the different adjustment criteria and features of optimal solutions about the least-squares adjustment, the uncertainty adjustment and total least-squares adjustment. Existing error theory is extended with new observational data processing method about uncertainty.

Key words: uncertain, adjustment criterion, residual error, total least-squares adjustment, adjustment model

CLC Number: