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国际全球导航卫星系统服务(international GNSS service,IGS)精密星历产品的产生时间较长和一阶差分电离层延迟影响是长基线卫星编队利用星载双频全球定位系统实现高精度快速星间差分相对定位存在的两大问题。针对上述问题,提出了一种基于IGS超快速星历的动力学单差消电离层组合相对定位方法,该方法利用IGS超快速星历,加快数据准备;通过构建单差消电离层组合,消除一阶单差电离层延迟的影响。采用重力反演与气候实验卫星一周的观测数据进行相对定位实验,由K波段测距系统检核的结果为7.05 mm,与采用精密星历的精度相当,从而验证了利用本方法可以快速实现长基线卫星编队毫米级相对定位。
International GNSS service (IGS) Precise ephemeris production takes longer and first-order differential ionospheric delay effects are long baseline satellite formation using the spaceborne dual-frequency global positioning system for high-precision fast intersatellite differential Relative positioning of the two major problems. In view of the above problems, a new method based on IGS superfast ephemeris is proposed, which is based on the kinematic single differential ionosphere combination relative positioning method. This method uses IGS superfast ephemeris to speed up data preparation. By constructing a single differential ionosphere combination, Effect of first order single difference ionospheric delay. Relative positioning experiment was conducted by using gravity inversion and climatic experimental satellite observation data for one week. The result of K-band ranging system checking was 7.05 mm, which was equivalent to that of using precise ephemeris, which verified that this method could quickly realize long Baseline satellite formation millimeter relative positioning.