Citation
Abstract
Radio interferometry can be used to measure the offsets between the clocks at the various Stations of the DSN, and to monitor the rates of the station frequency standards, A wideband digital data acquisition system has been developed to measure the clock offsets to the 10-ns accuracy required to facilitate three-way spacecraft ranging, to monitor the hydrogen maser frequency standard rates to 1 part in 10 4 and to potentially reduce operational costs by replacing the current DSN Operational Time Sync System. Three experiments have been conducted with this system, two short-baseline experiments at Goldstone and one long-baseline experiment between Goldstone and Australia, All achieved subnanosecond resolutions. These accuracies were independently confirmed to within about 3 ys, as limited by the accuracy of available independent measurements.
Details
- Volume
- 42-37
- Published
- February 15, 1977
- Pages
- 57–68
- File Size
- 1006.7 KB