单双频混合GNSS变形监测系统中单频点电离层误差改正
发布时间：2018-08-16 12:31
【摘要】：采用单双频GNSS混合模式进行变形监测的关键是利用双频点数据建立区域电离层误差改正模型,并对单频点的电离层延迟误差进行改正,从而使单频点监测精度也能满足要求。利用广州南沙单双频地面沉降监测网数据对LCM、DIM、LIM、LSM四种区域电离层误差改正模型及其建立方案进行实例,结果表明,4种电离层误差改正模型均能显著改善单频点的监测精度,其中LCM与LIM较优,且利用单频点周围近距离的3个双频点构建区域电离层模型的处理策略最佳。
[Abstract]:The key to the deformation monitoring by using the single and double frequency GNSS mixed mode is to establish the correction model of the ionospheric error using the double frequency data, and to correct the ionospheric delay error of the single frequency point, so that the monitoring accuracy of the single frequency point can also meet the requirements. Using the data of single and double frequency ground subsidence monitoring network in Nansha, Guangzhou, four regional ionospheric error correction models of LCM-DIMM and LSM and their establishment schemes are given. The results show that the four ionospheric error correction models can significantly improve the monitoring accuracy of single frequency points. Among them, LCM and LIM are better, and the best processing strategy is to construct a regional ionospheric model by using three close double frequency points around a single frequency point.
【作者单位】： 中南大学地球科学与信息物理学院;
【基金】：中南大学研究生自主探索创新基金(2014zzts258)~~
【分类号】：P228.4
[Abstract]:The key to the deformation monitoring by using the single and double frequency GNSS mixed mode is to establish the correction model of the ionospheric error using the double frequency data, and to correct the ionospheric delay error of the single frequency point, so that the monitoring accuracy of the single frequency point can also meet the requirements. Using the data of single and double frequency ground subsidence monitoring network in Nansha, Guangzhou, four regional ionospheric error correction models of LCM-DIMM and LSM and their establishment schemes are given. The results show that the four ionospheric error correction models can significantly improve the monitoring accuracy of single frequency points. Among them, LCM and LIM are better, and the best processing strategy is to construct a regional ionospheric model by using three close double frequency points around a single frequency point.
【作者单位】： 中南大学地球科学与信息物理学院;
【基金】：中南大学研究生自主探索创新基金(2014zzts258)~~
【分类号】：P228.4
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