Abstract: Several antiquated electronic design features of the Dobson ozone spectrophotometers have been replaced with revised circuitry, resulting in instruments with improved performance characteristics.

Abstract: No Abstract Available.

Abstract: A set of eight CO2-in-air secondary standard calibration gases has been established by NOAA/Geophysical Monitoring for Climatic Change (GMCC) for use in its global CO2 monitoring program. Use of these gases obviates the ...