Geodesy by radio interferometry: Optimization of wet path delay algorithms using microwave radiometer data
The report deals with algorithms for estimating the excess propagation path of radio waves through the atmosphere using microwave radiometer data. The authors have used radiosonde data from different sites to study and evaluate the performance of such algorithms. The sites chosen represent climates similar to that of nearby currently existing or planned antennas for use in geodetic very-long-baseline interferometry experiments. They find that the accuracy of the algorithm, assuming noise-free measurements and error-free expressions for the atmospheric attenuation, is significantly improved if the algorithms are optimized for a given site. They present site-optimized algorithms, with and without using surface meteorological data, for the most common frequency pairs of existing microwave radiometers, namely 20.7 to 31.4 GHz and 21.0 to 31.4 GHz.
NASA STI/Recon Technical Report N
- Pub Date:
- December 1987
- Microwave Interferometers;
- Communications and Radar