Citation
Abstract
The VLBI modeling software packages CALC 6.0 (GSFC) and MASTERFIT (JPL) are compared in some detail. Theoretical model delays are calculated for a set of 120 fictitious observations which involve a variety of sources, baselines, and antennas, Discrepancies between the total delays given by the two programs are of the order of 2 em (RMS). The modeling of antenna offsets appears to account for approximately half of this difference. Relativistic bending contributions to the delay differ by 3 cm (RMS), and there appears to be some mutual cancellation of errors involving antenna offsets, bending, and the effects of the two different Solar System ephemerides employed by CALC and MASTERF'IT. This cancellation has not been completely characterized in the present study.
Details
- Volume
- 42-83
- Published
- November 15, 1985
- Pages
- 101–112
- File Size
- 685.2 KB