Short-term stability of GNSS on-board clocks using the polynomial method

The stability of on-board clocks is an essential issue in the performance of Global Navigation Satellite Systems (GNSS). We developed a straightforward method (the polynomial method) that allows to determine the short term stability of a GNSS on-board clock for a pass over a ground station driven by a clock, the characteristics of which are better than the space clock we want to characterize. In previous papers [1,2], we validated the method on GPS on-board clocks using IGS clock products as reference. In this paper, we continue this work with GLONASS, Galileo, COMPASS/Beidou and QZSS on-board clocks.