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Characterization of Chip-Scale Atomic Clock for GNSS navigation solutions

机译:用于GNSS导航解决方案的芯片级原子钟的特性

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Chip Scale Atomic Clocks are a recently developed technology, that used together with a GNSS receiver helps to improve the performance of GNSS navigation solutions in some particular conditions [1]. Current GNSS receivers include a Temperature Compensated Cristal Oscillator (TCXO) clock which is characterized by a short term stability (τ = 1 second) of 2·10-9 seconds that leads to an error of 0.6 meters in pseudorange measurements. While a Chip Scale Atomic Clock (CSAC) [1] has a stability (τ = 1 second) of 2.5·10-10 seconds that implies a range error of 0.075 meters. The use of TCXO forces the inclusion of a time parameter in the navigation algorithms, which reduces the positioning performance in poor satellite constellation conditions, reflected in the Dilution of Precision (DoP) values [2]. The aim of the study presented on this paper is to characterize the impact of the Cesium Atomic clocks technology, specifically a CSAC clock, in high-grade GNSS receivers by evaluating the position scattering and the holdover.
机译:芯片级原子钟是一种最新开发的技术,与GNSS接收器一起使用有助于在某些特定条件下提高GNSS导航解决方案的性能[1]。当前的GNSS接收器包括温度补偿晶体振荡器(TCXO)时钟,其特点是2·10-9秒的短期稳定性(τ= 1秒),在伪距测量中导致0.6米的误差。芯片级原子钟(CSAC)[1]具有2.5·10-10秒的稳定性(τ= 1秒),这意味着0.075米的范围误差。 TCXO的使用迫使时间参数包含在导航算法中,从而降低了在较差的卫星星座条件下的定位性能,这反映在精度稀释(DoP)值上[2]。本文提出的研究目的是通过评估位置散射和保持效应来表征铯原子钟技术(特别是CSAC钟)对高级GNSS接收机的影响。

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