In order to make full use of multi-GNSS constellations for time transfer, we propose a multi-
GNSS combination method based on the fault-tolerant federated Kalman filter. First, the …

GNSS spoofing has become a significant security vulnerability threatening remote sensing
systems. Hardware fingerprint-based GNSS receiver identification is one of the solutions to …

The time scale of the global navigation satellite system (GNSS) is the core element for its
position, navigation and timing services. A highly stable atomic clock is essential to ensure …

To raise the precision and stability of time transfer links, a wavelet-based multi-resolution
data fusion technique is offered. This approach fixes the “Day-Boundary discontinuities” in …

Kalman filters (KFs) are widely used in atomic clock estimation. However, their theoretical
performances are not strictly determined by traditional methods when the observation …

Timely detection of abnormalities in clock sources is a crucial issue in the miniaturization
and widespread adoption of high-performance clock sources. This paper investigates two …

Atomic clocks are the most accurate timekeeping instruments in the world and play a crucial
role in numerous applications, notably in satellite navigation. Nonetheless, the accuracy of …

A new method based on the innovation of Kalman filter and extrapolation-accumulation is
proposed to detect weak frequency anomalies in atomic clocks with short detection time and …

The caesium fountain clock (CSF) is a primary frequency standard used to define the
second, which can greatly improve the autonomous timekeeping ability of laboratories …

卫星导航系统中原子钟的频率跳变直接影响着导航, 定位, 授时的精度, 因此,
有必要研究具有实时性, 准确性的频率跳变检测方法. 首先, 通过仿真分析比较基于Kalman …