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首页> 外文会议>Proceedings of the 22nd international technical meeting of the Satellite Division of the Institute of Navigation (ION GNSS 2009) >Renovated GLONASS:Improved Performances of GNSS Receivers
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Renovated GLONASS:Improved Performances of GNSS Receivers

机译：翻新的GLONASS：提高GNSS接收器的性能

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The paper deals with changes in GLONASS since 2005: earlier publication [Zinoviev,2005]serves as a reference point with respect to which updates related to GLONASS are given.GLONASS has been renovated dramatically over the period of last four years.Currently,there are 18 GLONASS-M satellites orbiting,thus GLONASS can be considered not just as GPS augmentation system but rather as a solo GNSS providing close to 24/7 service(up to 10 GLONASS satellites can be visible simultaneously at some periods of time).Also,GLONASS-only position can be computed at about 98%of all epochs over one day interval.Along with increased constellation,more important“qualitative”changes associated with the contents of GLONASS-M navigation data,improved reliability,availability of new civil L2 SA signal etc.took place.For example,GLONASS-M provides identification of ephemeris and time-and-frequency data without using any special methods.It is important for differential modes,in which corrections are computed with respect to broadcast navigation data. rnAll such changes in GLONASS have a direct impact on GNSS positioning performances.In particular,this paper focuses on GLONASS-only positioning performances.It is shown that GLONASS RTK positioning performances are close to GPS RTK positioning performances in terms of accuracy.Also,GLONASS L2 HA(High Accuracy) (“L2 P-code”)and L2 SA(Standard Accuracy)(“L2 C/A- code”)signals are analyzed.Despite L2 HA signal is modulated with undocumented navigation data,there is a method to track this signal without having 0.5-cycle errors in carrier phase observables,even if L2 SA signal is not used. rnGLONASS is a must for state-of-the-art GNSS precise products.However,to make GLONASS useful at full, some interoperability issues need to be resolved.Perhaps, the most important among them is the issue associated with biases in GLONASS carrier phase double differences.This problem manifests itself when working with GNSS receivers of different manufacturers.It is demonstrated this problem can be solved efficiently by means of applying pre-defined corrections.In conclusion, it is noted GLONASS is the most rapidly deploying GNSS–as such it has well-defined directions for further improvement.The list of some of such improvements is given and,finally,outputs are provided.
机译：该论文探讨了自2005年以来GLONASS的变化：较早的出版物[Zinoviev，2005]可以作为参考点，提供有关GLONASS的更新。在过去的四年中，GLONASS进行了重大翻新。 18颗GLONASS-M卫星在轨道上运行，因此GLONASS不仅可以看作是GPS增强系统，而且还可以看作是提供接近24/7服务的单独GNSS（在一段时间内最多可以同时看到10颗GLONASS卫星）。在一天的时间间隔内，可以计算约98％的仅GLONASS的位置。随着星座的增加，与GLONASS-M导航数据的内容相关的更重要的“质性”变化，提高的可靠性和新型民用L2 SA的可用性例如，GLONASS-M无需使用任何特殊方法即可识别星历和时频数据。这对于差分模式非常重要，在差分模式下，使用关于广播导航数据。 rn GLONASS中的所有此类变化都直接影响GNSS定位性能，尤其是本文仅针对GLONASS定位性能。从准确性的角度来看，GLONASS RTK定位性能接近GPS RTK定位性能。分析了L2 HA（高精度）（“ L2 P代码”）和L2 SA（标准精度）（“ L2 C / A-code”）信号。尽管L2 HA信号是用未记录的导航数据调制的，但是有一种方法即使在不使用L2 SA信号的情况下，也可以在载波相位可观察到的情况下跟踪此信号而不会出现0.5个周期的误差。 rnGLONASS是最先进的GNSS精密产品的必需品，但是，要使GLONASS充分发挥作用，就需要解决一些互操作性问题，也许其中最重要的是与GLONASS载波相位偏差相关的问题双重差异。这个问题在与不同制造商的GNSS接收机一起使用时表现出来。这表明可以通过应用预定义的纠正有效地解决此问题。总而言之，可以注意到GLONASS是部署速度最快的GNSS，因此它给出了进一步改进的明确方向。给出了其中一些改进的清单，最后提供了输出。

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