Analysis of GPS Timing Data in Support of Omega System Synchronization: A Cesium Stability Study.

摘要

The use of GPS precise time-transfer has the potential for improving the accuracy and the efficiency of Omega synchronization. Under the present scheme of synchronization, designed long before the availability of global time-transfer, synchronization adjustments were made once per week. These adjustments are based on a statistical estimate of timing errors derived from very-long-baseline reciprocal path phase measurements. This report examines an alternate approach to synchronization using GPS as the primary means of measuring timing errors at individual stations, independent of other stations. A Covariance Simulation Program (CSP) has been developed to simulate the behavior of cesium frequency standards under various error correction schemes. The CSP is based on a cesium stability model and accepts actual Omega station data as input to model the rate of growth of timing errors under various scenarios. The results of the CSP can then be used to support decisions on the architecture of the synchronization process. Associated with this report is an Addendum showing sample CSP results and a CSP User's Guide. Keywords: Omega, Synchronization, Cesium stability, GPS, Covariance simulation program. (JHD)