Tropospheric calibration in radio interferometry
Abstract
A new tropospheric mapping function is derived which is more accurate than previous mapping functions above elevations of 4 deg. The error due to the given analytic aproximation is estimated to be less than 0.2 percent for elevation angles larger than 6 deg (less than 0.4 cm at 6 deg). The mathematical expansion used in the derivation is valid for any laterally homogeneous atmospheric model of refractivity. The new mapping function, computer-generated ray tracing tables, and other mapping functions are compared.
- Publication:
-
International Symposium on Space Techniques for Geodynamics
- Pub Date:
- 1984
- Bibcode:
- 1984stg.....2..184L
- Keywords:
-
- Atmospheric Correction;
- Calibrating;
- Radio Interferometers;
- Radio Wave Refraction;
- Radiometric Correction;
- Troposphere;
- Atmospheric Moisture;
- Elevation Angle;
- Error Analysis;
- Mapping;
- Meteorological Parameters;
- Time Lag