GNSS Taşıyıcı Faz Ölçmelerinde Belirsizlik Çözümü için LAMBDA Yöntemi

Authors : Mevlüt YETKİN, Cevat İNAL

Pages : 15-24

View : 19 | Download : 10

Publication Date : 2010-12-01

Article Type : Research Paper

Abstract :One of the essential conditions for high precision relative positioning using GNSS is resolving the double differenced carrier phase ambiguities. One method used in ambiguity resolution is the LAMBDA Least-squares AMBiguity Decorrelation Adjustment method. When using the LAMBDA method, the integer ambiguity estimation is computed in two steps. First the ambiguities are decorrelated by means of Z-transformation. Then, the integer minimization problem is solved by a discrete search over an ellipsoidal region. This paper studies integer rounding, sequential conditional integer rounding and the LAMBDA method which are integer ambiguity estimators. Moreover a numerical example is presented.
Keywords : Relative Positioning, Ambiguity Resolution, Phase Observations, Integer Least Squares Estimator, Decorrelation