不通过自由纸面时建立时间基准的方法与性能分析

doi:10.11947/j.AGCS.2021.20190505

摘要/Abstract

摘要： 本文提出了一种不通过自由纸面时建立时间基准的方法。核心思想是每台原子钟都分别相对于外参考进行预测和驾驭，这样每台钟都得到一台受外参考驾驭的钟，然后再对这些受驾驭钟进行加权平均，建立时间基准。本方法避免了由于传统方法中单台钟的时差和自由纸面时相互影响而造成的不足，还可以针对每台钟的特性分别优化设计预测算法和驾驭算法。概述了传统方法的基本原理和不足，详细描述了本方法的基本原理、理论优势、预测算法、驾驭算法和权重算法的设计原理。实测数据试验展示了传统方法的不足，仿真试验对比分析了传统方法和本文方法建立的时间基准的性能，初步验证了本方法的优异性能。

关键词: 时间基准, 原子钟, 自由纸面时, 预测, 驾驭, 权重

Abstract: This paper proposes a method of establishing a time reference without a free paper time scale. The core idea is predicting and steering each atomic clock versus external reference time scale, respectively.Each clock can obtain a time scale steered by the external reference time scale. Then, the time reference is a weighted average of the steered time scales. The new method avoids the problems resulting from the correlation of the paper time scale and the time difference of each contributing clocks of traditional methods. Moreover, prediction algorithms and steering algorithms can be optimized according to different clocks with different characteristics, respectively. At the beginning, this paper briefly describes the basic principles of traditional methods and their weaknesses. Then, the basic principle, the theoretical advantages and the design principles of the prediction algorithm, steering algorithm and weighting algorithm of the new method are described in detail. An experiment shows the weakness of traditional methods. A simulation shows the traditional method and new method performances, and also preliminarily validates the excellent performances of this method.

Key words: time reference, atomic clock, free paper time scale, prediction, steering, weight

中图分类号:

P227

伍贻威, 王世超. 不通过自由纸面时建立时间基准的方法与性能分析[J]. 测绘学报, 2021, 50(3): 343-355.

WU Yiwei, WANG Shichao. A method of establishing a time reference without a free paper time scale and its performance[J]. Acta Geodaetica et Cartographica Sinica, 2021, 50(3): 343-355.

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