Abstract

A major intercomparison campaign for the measurement of tropospheric OH was scheduled for September 1993 in the mountains near Boulder, CO, with our laboratory providing measurements of the OH concentration by spectroscopic detection of UV absorption in a 20 km path, to a retroreflector array across a wide valley and back. In early 1993, we decided to try to build a simple FTS that would be used to measure the concentration of CO - a crucial molecule in the photochemistry cycle for OH - on that same path using the 2-0 band in the near infrared. With a tight schedule and a low budget, some new design approach was needed; the resulting instrument, designed in collaboration with Roger Jakoubek of this Laboratory, appears to embody some ideas of general applicability.

© 1995 Optical Society of America