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首页> 外文期刊>Earth, planets and space: EPS >Calibration of antenna-radome and monument-multipath effect of GEONET—Part 2: Evaluation of the phase map by GEONET data
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Calibration of antenna-radome and monument-multipath effect of GEONET—Part 2: Evaluation of the phase map by GEONET data

机译：GEONET的天线-天线罩和纪念碑-多径效应的校准—第2部分：通过GEONET数据评估相位图

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Phase maps for GSI/GEONET (Geographical Survey Institute/GPS Earth Observation NETwork) monuments and antennas obtained in Hatanaka et al . (2001) are evaluated by applying them to the analysis of GEONET. We used the same strategy as the GEONET routine analysis except for the antenna phase model. The coordinate solutions change by more than 10 cm in height when we apply the new phase maps. A scale change of up to 20 ppb is also observed for one of the sub-networks. The height bias is not constant but changing daily and seasonably, which implies that seasonal variations in the GPS solution are related to mis-modeling of the phase characteristics and that other environmental or geometric factors are coupled to the phase mis-modeling. Two more checks are done by comparing tropospheric delay estimates, and by conducting elevation angle cutoff tests. Both tests show dramatic improvement when the new phase maps are applied, as compared to applying the standard antenna phase maps. It is concluded from this experiment with almost 1000 GEONET sites, that monument/antenna specific phase characteristic calibrations are essential for any application of GPS to achieve the highest accuracy for Earth science applications.
机译：在Hatanaka等人获得的GSI / GEONET（地理调查局/ GPS地球观测网络）纪念碑和天线的相位图。 （2001）通过将其应用于GEONET分析进行评估。除了天线相位模型外，我们使用了与GEONET常规分析相同的策略。应用新的相位图时，坐标解的高度变化超过10 cm。对于其中一个子网，还观察到规模变化高达20 ppb。高度偏差不是恒定的，而是每天和季节性变化的，这意味着GPS解决方案中的季节性变化与相位特性的错误建模有关，而其他环境或几何因素也与相位错误建模有关。通过比较对流层延迟估计并进行仰角截止测试，可以进行另外两项检查。与应用标准天线相位图相比，在应用新的相位图时，两项测试均显示出显着改善。从近1000个GEONET站点的实验得出的结论是，纪念碑/天线特定的相位特性校准对于GPS的任何应用都是至关重要的，以实现地球科学应用的最高精确度。

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