A Demonstration of Precise Calibration of Troposheric Delay Fluctuations with Water Vapor Radiometers

Abstract

The ability of Water Vapor Radiometers (WVRs) to calibrate changes in tropospheric delay was demonstrated during very long baseline radion interferometer (VLBI) opbservations at Goldstone, California. WVR measurements reduced the observed VLBI delay variations over a 13 hr period by a factor of approx. 2.5.