Delay and Phase Calibration in VGOS Post-Processing
Abstract
In recent years, large amounts of data have begun to flow through the VGOS pipeline, and significant real-world issues are now being encountered in the fringe-fitting process. In order to create a high-quality geodetic observable it is important to minimize the sensitivity of the group delay to instrumental parameters that may change over time, while at the same time maximizing the amount of information that is extracted. This paper addresses a number of topics relevant to those goals, such as matching of delays in polarization products and receiving bands, and coherent phasing of the four polarization products. We describe the software that automates the somewhat tedious determination of the calibration parameters. The ionosphere is highly correlated with the group-delay observable, so its accurate characterization and removal are central to the determination of the calibration parameters.
- Publication:
-
New Horizons with VGOS
- Pub Date:
- December 2016
- Bibcode:
- 2016ivs..conf...61C