Engineering topics
Publications and source records attributed to Anderson, B. G..
The illuminating source of the photodissociation region associated with the reflection nebula NGC7023 is HD200775. We probed the foreground atomic and molecular material through diagnostics observed in absorption against the background star.
L1457 is the closest known molecular cloud (65pc), and lies near the edge of the local hot bubble, and well out of the galactic plane (b~ -34 deg).
A passive microwave spectrometer system for measuring global atmospheric temperature profiles from 0-75 km altitude was developed and analyzed. The system utilizes 12 channels near the 5 mm wavelength oxygen absorption band and is designed to provide global coverage by scanning perpendicular to the orbital track of a polar orbiting satellite. A significant improvement in the accuracy of theoretical atmospheric microwave transmittance functions was achieved through the development of a first-order approximation to overlapping line theory for the oxygen molecule. This approximation is particularly important in the troposphere and lower stratosphere where pressure-broadening blends nearby lines. Ground-based and aircraft observations of several resonances of stratospheric oxygen generally support the theory. The 23, 25, 29, and 31 atmospheric oxygen lines were measured and the frequencies of several such oxygen lines were measured with improved precision. The polarization and Zeeman splitting of the atmospheric 27 line was also observed.