CAJ | 학술논문

针对GPS实时动态精密相对定位应用背景,提出一种整周模糊度实时求解方法.采用宽巷组合载波相位双差、伪距双差观测信息建立观测模型;对浮点模糊度协方差阵进行一次Cholesky分解,构造了浮点转换矩阵,使浮点模糊度完全去相关;推导确定整周模糊度的搜索空间;利用最小残差平方和搜索准则,确定单历元整周模糊度,并用OVT检验方法,对不同历元得到的整周模糊度进行一致性检验.结果表明,观测量误差均方差取值对整周模糊度搜索空间和成功率有较大影响,附加OVT检验的双频去相关单历元动态解算整周模糊度方法正确可行.
침대GPS실시동태정밀상대정위응용배경,제출일충정주모호도실시구해방법.채용관항조합재파상위쌍차、위거쌍차관측신식건립관측모형;대부점모호도협방차진진행일차Cholesky분해,구조료부점전환구진,사부점모호도완전거상관;추도학정정주모호도적수색공간;이용최소잔차평방화수색준칙,학정단역원정주모호도,병용OVT검험방법,대불동역원득도적정주모호도진행일치성검험.결과표명,관측량오차균방차취치대정주모호도수색공간화성공솔유교대영향,부가OVT검험적쌍빈거상관단역원동태해산정주모호도방법정학가행.
According to the application of GPS differential precise navigation, an ambiguity resolution algorithm is presented. The mathematical model is set up using observations of wide lane double differential carrier phase and double differential pseudorange. In order to make float ambiguity uncorrelated completely, float transformation matrix is constructed by Cholesky decomposition and the integer ambiguity search space is deduced. The criterion of least square residual is used to obtain single-epoch integer ambiguity, OVT (over-the-time) method is applied to verify the consistency of integer ambiguity at different epochs. Experimental results indicate that the mean square deviation of observations has great effect on integer ambiguity's search space and success rate, and the integer ambiguity can be determined correctly and reliably by OVT testing.