Continued Evaluation of Carrier-Phase GNSS Timing Receivers for UTC/TAI Applications

Abstract : USNO previously evaluated several carrier-phase GNSS timing receivers to determine their suitability to support UTC/TAI applications. These receivers were subjected to thermal testing, power cycle retrace testing, and mid-term stability evaluation. Two receivers showed poor performance during these tests. Newer versions of these receivers were released and have been reevaluated. Test results are reported in this paper.