Stratospheric species measurements with tunable diode laser absorption spectroscopyA balloon-borne instrument for stratospheric research has been developed with the capability to simultaneously measure several chemically related species in situ, for a full diurnal cycle. The instrument utilizes tunable infrared diode lasers (TDLs) to provide the radiation in selected wavelength regions for sensitive absorption spectroscopy over a one-km round-trip path. The TDL radiation is directed to a remote retroreflector which is lowered 500 m below the instrument gondola. A HeNe laser and co-aligned TV camera with CID imaging are used for retroreflector tracking. Currently the instrument operates with two TDLs, and the capability exists to measure four stratospheric species: NO, NO2, O3, and H2O. The number of operating TDLs can be expanded to four, resulting in the possibility of measuring several additional trace species.
Document ID
19840060519
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Menzies, R. T. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Webster, C. R. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)