Single-frequency L5 attitude determination from IRNSS/NavIC and GPS: a single- and dual-system analysis
Single-frequency L5 attitude determination from IRNSS/NavIC and GPS: a single- and dual-system analysis
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DOI：
10.1007/s00190-017-1033-y
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发表时间：
2017-05
影响因子：
4.4
通讯作者：
S. Zaminpardaz;Peter Teunissen;Peter Teunissen;N. Nadarajah
中科院分区：
文献类型：
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作者：
S. Zaminpardaz;Peter Teunissen;Peter Teunissen;N. Nadarajah
印度区域导航卫星系统（IRNSS）最近（2016年5月）达到了全面运行能力。在这篇文章中，我们提供了第一个L5姿态确定分析的全面运作IRNSS作为一个独立的系统，并结合全面运作的GPS块IIF沿着与相应的模糊度解决方案的结果。我们的分析进行了两个天线的线性阵列和一个平面阵列的三个天线在科廷大学，珀斯，澳大利亚。研究了该系统的噪声特性（载噪比、测量精度、时间相关性）、整周模糊度解算性能（LAMBDA、MC-LAMBDA）和姿态确定性能（模糊度浮动和模糊度固定）。快速精确的IRNSS姿态确定的前提是成功地解决双差整周载波相位模糊度。在这篇文章中，我们将比较无约束和多变量约束的LAMBDA方法的性能。因此，它也示出了当天线阵列的已知的身体几何形状被严格地纳入模糊度目标函数时实现的改进。由于我们的模糊固定的结果表明经验和正式的结果之间的一致性，我们还正式评估了精确的姿态确定性能IRNSS服务区内的几个位置。
The Indian Regional Navigation Satellite System (IRNSS) has recently (May 2016) reached its full operational capability. In this contribution, we provide the very first L5 attitude determination analyses of the fully operational IRNSS as a standalone system and also in combination with the fully operational GPS Block IIF along with the corresponding ambiguity resolution results. Our analyses are carried out for both a linear array of two antennas and a planar array of three antennas at Curtin University, Perth, Australia. We study the noise characteristics (carrier-to-noise density, measurement precision, time correlation), the integer ambiguity resolution performance (LAMBDA, MC-LAMBDA) and the attitude determination performance (ambiguity float and ambiguity fixed). A prerequisite for precise and fast IRNSS attitude determination is the successful resolution of the double-differenced integer carrier-phase ambiguities. In this contribution, we will compare the performance of the unconstrained and the multivariate-constrained LAMBDA method. It is therefore also shown what improvements are achieved when the known body geometry of the antenna array is rigorously incorporated into the ambiguity objective function. As our ambiguity-fixed outcomes show consistency between empirical and formal results, we also formally assess the precise attitude determination performance for several locations within the IRNSS service area.