...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE sensors journal >GPS Height Variations Affected by Ocean Tidal Loading Along the Coast of Taiwan
【24h】

GPS Height Variations Affected by Ocean Tidal Loading Along the Coast of Taiwan

机译：台湾沿海潮汐载荷对GPS高度变化的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Global Positioning System (GPS) uses static relative positioning to mitigate common errors and has the ability to remove the effects of ocean tidal loading (OTL). OTL effects cannot be completely removed by increasing the baseline length during GPS data processing and must be corrected with OTL models, especially in Taiwan, which is surrounded by the ocean. In this paper, we collected GPS data from ten stations that are located along the coast of Taiwan. The periodic effect of OTL is discussed through a wavelet analysis and a harmonic analysis. We also calculated the amplitudes and phases of the semi-diurnal and diurnal tides to understand the effect of OTL on the GPS heights along the coast of Taiwan. The GPS data were divided into short-term (1 month) and long-term (2 years) categories and were calculated using the Bernese 5.0 software. The tidal data and the GPS heights were transferred into a wavelet spectrum for analysis. We found that in the tidal data, the periodic M2 signal was stronger than the K1 signal, which was not the case for the GPS height data. This result indicated that the common errors were not completely removed from the GPS heights and that the corresponding period was approximately 1 day, which might result in a stronger K1 signal. Moreover, five OTL models were chosen and compared in this case. Although the GPS heights with different OTL corrections were very similar, NAO.99b was the best fitting model for the ocean around Taiwan. Finally, we analyzed the tidal data and the M2 amplitudes and phases of the GPS heights using a harmonic analysis and compared the results with the NAO.99b model. The comparison indicated that the best agreement occurred in southwestern Taiwan and that the poorest agreement occurred in southeastern Taiwan with a maximum error of 0.3 cm. The phase results showed that the OTL model overlapped with the tidal data in the open ocean around central Taiwan, and both the GPS heights and the heights from the OTL model w- re 1.5 to 2 h earlier than the tidal data.
机译：全球定位系统（GPS）使用静态相对定位来减轻常见错误，并且能够消除海洋潮汐负荷（OTL）的影响。在GPS数据处理过程中不能通过增加基线长度来完全消除OTL的影响，必须使用OTL模型进行校正，尤其是在四面环海的台湾。在本文中，我们从台湾沿海的十个站点收集了GPS数据。通过小波分析和谐波分析讨论了OTL的周期性影响。我们还计算了半日潮和日潮的振幅和相位，以了解OTL对台湾沿海GPS高度的影响。 GPS数据分为短期（1个月）和长期（2年）类别，并使用Bernese 5.0软件进行计算。潮汐数据和GPS高度被转换成小波谱进行分析。我们发现，在潮汐数据中，周期性的M2信号比K1信号更强，而GPS高度数据却并非如此。该结果表明，常见错误并未从GPS高度中完全消除，相应的时间约为1天，这可能会导致更强的K1信号。此外，在这种情况下，选择并比较了五个OTL模型。尽管具有不同OTL校正的GPS高度非常相似，但NAO.99b是台湾周围海洋的最佳拟合模型。最后，我们使用谐波分析法分析了潮汐数据以及GPS高度的M2振幅和相位，并将结果与​​NAO.99b模型进行了比较。比较表明，最佳吻合发生在台湾西南部，而最差吻合发生在台湾东南部，最大误差为0.3 cm。阶段结果表明，OTL模型与台湾中部附近的公海中的潮汐数据重叠，GPS高度和OTL模型的高度都比潮汐数据早1.5至2 h。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号