Spectral Line Interferometry and Interferometer Noise Analysis

摘要

The theory of spectral line interferometry is developed with special reference to interferometer systems built to study the emission from interstellar OH molecules. Expressions for the root-mean-square noise of visibility amplitude and phase are derived in terms of the geometric means of the system and antenna temperatures. Methods are discussed for obtaining the visibility function from measurements made at widely separated sites by means of precise frequency and time standards. (Author)