CAJ | 학술논문

为实现多模组合导航，必须确定各导航系统之间的时间差。利用中国科学院国家授时中心（NTSC）双模双频时差监测型接收机输出的数据文件，通过分别计算本地时与GPS时、GLONASS时的偏差间接计算两系统间的时间偏差。采用灰色预报模型和二次多项式模型进行联合时差预报，对实测时间偏差值与预报时间偏差值之间的残差进行分析。试验结果表明与传统的二次多项式模型预报相比，组合预报结果的精度有所提高。
위실현다모조합도항，필수학정각도항계통지간적시간차。이용중국과학원국가수시중심（NTSC）쌍모쌍빈시차감측형접수궤수출적수거문건，통과분별계산본지시여GPS시、GLONASS시적편차간접계산량계통간적시간편차。채용회색예보모형화이차다항식모형진행연합시차예보，대실측시간편차치여예보시간편차치지간적잔차진행분석。시험결과표명여전통적이차다항식모형예보상비，조합예보결과적정도유소제고。
For realizing the multimode combined navigation, it is necessary to determine the time differences between the different navigation systems. In this paper, the data outputted from a dual-mode/dual-frequency time-difference monitoring receiver, which is operated in the time keeping laboratory of the National Time Service Center(NTSC), is used for calculating the time differences between the local time and GPST/and GLONASST, then the time difference between GPST and GLONASST can be calculated indirectly. The Grey model and the quadratic polynomial model are combined for predicting the time differences, and then the residuals between the measured time difference and the predicted time difference are analyzed. The results show that the accuracy of the combination prediction algorithm is better than that of the traditional quadratic polynomial algorithm.