A Highly Stable Crystal Oscillator Applied to Geodetic VLBI Experiment
Abstract
Instead of a hydrogen maser, a carefully selected Crystal oscillator which is phase locked to a Cesium (Cs) frequency standard for time range of more than 100 seconds is adopted to the time and frequency standard of a geodetic VLBI experiment. The domestic VLBI experiment with 55km baseline using the Crystal oscillator at one end was made in Japan and the obtained error of the baseline vector components were 4cm, and that of the baseline length was 3cm. This system may be operated after only 2 hours warm up. These results coincides with those of conventional geodetic Laser ranging and VLBI using a hydrogen maser within the formal error. A VLBI experiment with over 1000km baselines were carried out successfully from October 1988, and over 11000km baseline bctween Japan and Antarctica was carried out succcssfully in January 1990.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1990
- Accession Number
- ADA519486
Entities
People
- Hitoshi Kiuchi
- Jun Amagai