| 短波时号异常及其对高精度天文经度测定的影响 |
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| 引用本文： | 刘彩璋,张金通.短波时号异常及其对高精度天文经度测定的影响[J].测绘学报,1993,22(4):295-298. |
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| 作者姓名： | 刘彩璋 张金通 |
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| 作者单位： | 武汉测绘科技大学
(刘彩璋)，中国科学院测量与地球物理研究所(张金通) |
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| 摘 要： | 本文介绍了短波时号异常现象的存在，短波异常时号产生的机理、特性及规律，及其导致短波传递时延增大的幅度。从而分析了短波时号异常对高精度天文经度测定的影响，在相应的观测实施中，收录无线电时号应采取的有效措施。
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| 关 键 词： | 短波时号 天文经度测定 |
SHORTWAVE TIME-SIGNAL ANOMALY AND ITSINFLUENCE ON THE MEASUREMENT OF HIGH-PRECISION ASTRONOMICAL LONGITUDE |
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| Liu Caizhang Zhang Jintong.SHORTWAVE TIME-SIGNAL ANOMALY AND ITSINFLUENCE ON THE MEASUREMENT OF HIGH-PRECISION ASTRONOMICAL LONGITUDE[J].Acta Geodaetica et Cartographica Sinica,1993,22(4):295-298. |
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| Authors: | Liu Caizhang Zhang Jintong |
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| Institution: | Liu Caizhang* Zhang Jintong*** |
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| Abstract: | :
In this paper, the authors point out the existence of shortwave time-signal anomaly (STSA) of the order of 10-2 second. This phenomenon leads to an increase in shortwave propagation time delay (SPTD). Based on the data analysis of experiments with short-ware time-signal emitting, propagating and receiving, the mechanism behend STSA, its character and regularity are studied, thereby the influence of STSA on the measurement
of high-precision astronomical longitude can be analysed. Effective measures for reducing this influence by way of observational arrangements are proposed, emphasis is placed on the timing of time-signal receiving. A method for judging whether there exits STSA is presented. The authors deem that a new kind of time-signal receiving equipment should be adopted |
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| Keywords: | :Shortwave time-signal anomaly The measurement of astronomicallongitude |
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