Citation
Abstract
Improvements in data quality for the Mobile VLBI systems have placed higher accuracy requirements on earth orientation calibrations. Errors in these calibrations may give rise to systematic effects in the nonlength components of the baselines. In this work, various sources of earth orientation data were investigated for calibration of Mobile VLBI baselines. Significant differences in quality were found between the several available sources of UT1-UTC. The JPL Kalman-filtered space-technology data were found to be at least as good as any other and adequate to the needs of current Mobile VLBI systems and observing plans. For polar motion, the values from all services suffice. In addition, the effect of earth-orientation errors on the accuracy of differenced baselines (i.e., baselines between Mobile VLBI sites which were not simultaneously occupied) was investigated. This effect was found to be negligible for the current mobile systems and observing plan.
Details
- Volume
- 42-78
- Published
- August 15, 1984
- Pages
- 202–215
- File Size
- 883.0 KB