Development of Receivers to Characterize Transit Time and Frequency Signals

This article describes the development of electronic receivers used to obtain precise measurements of Transit satellite signals such as Doppler shift, satellite ephemeris, and timing information. These measurements were used to determine past and future orbits of the satellites at fixed locations as well as navigation positions for receivers in submarines and ships and at other sites in an Earth-fixed coordinate system. The measurements were based on the best available standards of time and frequency. (