马小雪, 戴小蕾, 刘杨, 楼益栋, 刘万科, 吴迪. 固定模糊度的GLONASS卫星超快速轨道确定[J]. 武汉大学学报 ( 信息科学版), 2021, 46(12): 1932-1940. DOI: 10.13203/j.whugis20210260
引用本文: 马小雪, 戴小蕾, 刘杨, 楼益栋, 刘万科, 吴迪. 固定模糊度的GLONASS卫星超快速轨道确定[J]. 武汉大学学报 ( 信息科学版), 2021, 46(12): 1932-1940. DOI: 10.13203/j.whugis20210260
shu
MA Xiaoxue, DAI Xiaolei, LIU Yang, LOU Yidong, LIU Wanke, WU Di. Ultra-rapid Orbit Determination of GLONASS Satellite After Ambiguity is Fixed[J]. Geomatics and Information Science of Wuhan University, 2021, 46(12): 1932-1940. DOI: 10.13203/j.whugis20210260
Citation: MA Xiaoxue, DAI Xiaolei, LIU Yang, LOU Yidong, LIU Wanke, WU Di. Ultra-rapid Orbit Determination of GLONASS Satellite After Ambiguity is Fixed[J]. Geomatics and Information Science of Wuhan University, 2021, 46(12): 1932-1940. DOI: 10.13203/j.whugis20210260
shu

固定模糊度的GLONASS卫星超快速轨道确定

Ultra-rapid Orbit Determination of GLONASS Satellite After Ambiguity is Fixed

    摘要
  • 摘要: GLONASS采用的频分多址技术使得接收机接收不同卫星信号时存在频间偏差(inter-frequency bias, IFB)，导致GLONASS模糊度难以固定，是造成GLONASS轨道精度低于全球定位系统（global positioning system，GPS）的一个重要因素。目前国际GNSS服务（international GNSS service, IGS）分析中心仅有欧洲定轨中心(centre for orbit determination in Europe, CODE)提供GLONASS的固定解轨道。基于适用于长基线的GLONASS模糊度固定方法，采用区间搜索法确定频间相位偏差(inter-frequency phase bias, IFPB)斜率，修正IFPB对双差模糊度的影响，从而实现GLONASS无电离层组合模糊度固定，获得固定解的超快速轨道。利用全球均匀分布的测站对该方法在GLONASS超快速轨道解算中的效果进行验证分析，实验结果表明，一个月内不同基线的IFPB斜率在时域上均非常稳定，所有基线IFPB斜率平均标准差（standard deviation，STD）为0.38 mm；改正IFPB后GLONASS卫星模糊度固定成功率随基线长度增加而下降，固定成功率最高为95%，最低为88%，平均为94%；模糊度固定后，超快速轨道与CODE产品比较，计算部分精度提升26.8%，3~6 h预报轨道精度提升18%；内符合计算部分轨道精度提升20%，3~6 h预报轨道精度提升13%；卫星激光测距（satellite laser ranging, SLR）残差检核结果也显示模糊度固定后SLR残差有所减小，说明该方法可以有效进行GLONASS模糊度固定并提升超快速轨道精度。

     

    Abstract:
      Objectives  The frequency division multiple access technology of GLONASS causes IFB (inter-frequency bias) when the receiver receives signals from different satellites, which makes it difficult to fix the ambiguity of GLONASS. It is an important factor that makes the orbit accuracy of GLONASS inferior to that of GPS(global positioning system). At present, only CODE (centre for orbit determination in Europe) among the IGS (international GNSS service) analysis centers provides GLONASS ambiguity-fixed orbits. To improve the orbit accuracy of GLONASS, it is necessary to develop a method to fix ambiguity in GLONASS all baseline and all constellation orbit determination.
      Methods  Based on a GLONASS ambiguity fixing method for long baseline, GLONASS ultra-rapid orbit determination is propsed. Firstly, the float ionosphere-free ambiguity with a wavelength of about 5.3 cm is solved. Then the Inter-frequency phase bias (IFPB) rate will be determined by interval search method to correct the IFPB. After the IFPB is eliminated, the double difference ionosphere-free ambiguity can be fixed and then the ambiguity-fixed ultra-rapid orbit is obtained.
      Results and Conclusions  The effect of this method in the GLONASS ultra-rapid orbit determination is verified and analyzed by using globally distributed stations. The results show that the IFPB rates are relatively stable within one month. The fixing-rate of GLONASS satellite ambiguity after correcting IFPB decreases with the increase of baseline length. The highest fixing-rate is 95%, the lowest is 88%, and the average is 94%. After the ambiguity is fixed, compared with the CODE product, the accuracy of the ultra-rapid orbit is increased by 26.8% and 18% for the calculation part and the 3‒6 hour forecast part respectively, the accuracy of the inner precision is increased by 20% and 13% for the calculation part and the 3‒6 hour forecast part respectively, which indicates that this method can effectively fix the GLONASS ambiguity and improve the accuracy of ultra-rapid orbit.

     

    • HTML全文
    • 参考文献(25)
    • 相关文章
    • 施引文献
  • 资源附件(0)

/

返回文章
返回