title: Two-Laser Optical Distance-Measuring Instrument that Corrects for the Atmospheric Index of Refraction.
abstract: The Wave Propagation Laboratory of the Environmental Research Laboratories of the National Oceanic and Atmospheric Administration has been engaged in the development of dual-wavelength, optical distance- measuring instruments. Recently a new generation of this type of high-accuracy instrument has been completed. Preliminary testing of the new instrument indicates that the original goal of the project, accuracy of better than one part in a million over distances of 5-10 km using averaging times of less than 1 min, is being met. This paper describes the instrument and preliminary test results.
authors.forename: K B
authors.initials: KB
authors.lastname: Earnshaw
authors.forename: E N
authors.initials: EN
authors.lastname: Hernandez