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1. 发明授权

US06859690B2 Method for using GPS and crosslink signals to correct ionospheric errors in space navigation solutions 有权
标题翻译：使用GPS和交叉信号校正空间导航解决方案中电离层误差的方法
公开(公告)号：US06859690B2
公开(公告)日：2005-02-22
申请号：US10383320
申请日：2003-03-07
申请人： Mark S. Asher , Eric A. Olsen , Patrick A. Stadter
发明人： Mark S. Asher , Eric A. Olsen , Patrick A. Stadter
IPC分类号： G01S19/05 , G01S19/11 , G01S19/21 , G01S19/29 , G01S19/46 , G06F7/00 , G06F19/00
CPC分类号： G01S19/40
摘要： A method of correcting ionospheric delays induced in received signals by space systems is disclosed. The method takes advantage of received GPS signals and received crosslink signals among spacecraft to estimate the effect of ionospheric delays and correct for such delays in the computation of the range estimation between spacecraft. The method generates and initial estimate of the ionospheric delay by tracking pseudorandom codes on both GPS and crosslink signals at known frequencies to correct an initial relative range vector. Using the corrected range vector generated from the use of code, the method subsequently estimates a more precise correction by considering the carrier phase error as induced by ionospheric delay. This includes estimate the integer ambiguities on both the GPS signals and the crosslink signals iteratively and subsequently estimating a more precise ionospheric delay correction with is applied to the relative position vector using the carrier phase measurements. The method is also applicable to non-navigation applications including measuring dynamic ionospheric structure and variability over a wide range of scale sizes, thereby greatly improving operational models of navigation and communications, and improving interdependent models of atmospheric, ionospheric, magnetospheric, and space weather physics and prediction.
摘要翻译：公开了一种通过空间系统校正在接收信号中诱发的电离层延迟的方法。该方法利用接收的GPS信号，并在航天器之间接收到交叉信号，以估计电离层延迟的影响，并对航天器范围估计的计算中的这种延迟进行纠正。该方法通过在已知频率上跟踪GPS和交联信号上的伪随机码来产生和初始估计电离层延迟，以校正初始相对范围向量。使用从代码使用产生的校正范围向量，该方法随后通过考虑由电离层延迟引起的载波相位误差来估计更精确的校正。这包括迭代地估计GPS信号和交联信号上的整数模糊度，随后使用载波相位测量将相对位置矢量应用于更精确的电离层延迟校正。该方法还适用于非导航应用，包括测量动态电离层结构和范围广泛的尺度范围内的变异性，从而大大提高导航和通信的运行模型，并改善大气，电离层，磁层和空间天气物理学的相互依赖模型和预测。

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