Kalman Filter Characterization of Cesium Clocks and Hydrogen Masers; Conference paper

摘要

Our previous PTTI paper demonstrated that a two-state Kalman filter involving the parameters frequency and frequency drift, when properly implemented, produces frequencies for hydrogen masers that generate a stable mean timescale, at least for cases involving simulated and low-noise real data. The current paper extends the investigation to the noisier data actually employed in the USNO operational timescale. Results for about 500 days of postprocessed data for 12 masers and 51 cesium clocks indicate comparable frequency stabilities to those obtained with the currently operational timescale algorithm.