Diode Laser Hygrometer
The NASA Langley/Ames Diode Laser Hygrometer (DLH) is an open path airborne tunable diode laser-based instrument which operates in the near-infrared spectral region at a wavelength of approximately 1.4 μm. The DLH measures the water vapor (H2O(v)) mixing ratio in the atmosphere by wavelength modulated differential absorption spectroscopy of an isolated rovibrational line.
Glenn S. Diskin, Glen Sachse
Glenn S. Diskin
Southwest Sciences Inc.
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