A phase-coherent link via synchronous satellite developed for very long baseline radio interferometry
Article first published online: 7 DEC 2012
This paper is not subject to U.S. copyright. Published in 1982 by the American Geophysical Union.
Volume 17, Issue 6, pages 1661–1670, November-December 1982
How to Cite
1982), A phase-coherent link via synchronous satellite developed for very long baseline radio interferometry, Radio Sci., 17(6), 1661–1670, doi:10.1029/RS017i006p01661., , , , , , , , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 13 JUL 1982
- Manuscript Received: 30 APR 1982
A high-precision, phase coherent link between remote interferometer stations has been developed and has been utilized in a transcontinental radio interferometer to assess the feasibility of improved astrometric and geodetic measurements. A dual-tone transmission method effectively cancels most phase-degrading effects. An experimental Allen variance curve indicates that stability of 1 × 10−13 was achieved over a 1-hour period; the slope of the Allen variance curve was close to − 1 for all time intervals up to 24 hours, indicating that the link is truly phase stable at frequencies of less than 1 GHz. Changes in the link path were measured with an accuracy of 300 ps, corresponding to 10 cm, over periods of several hours.