Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Patent
1996-03-01
1998-06-16
Porta, David P.
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
2503385, G01N 2135
Patent
active
057675198
ABSTRACT:
The present system and method employs Differential Absorption Lidar (DIAL) system and method to measure gas concentration within a plume, for example, ozone density with a rocket exhaust plume when large quantities of chlorine and alumina particles are injected directly into the stratosphere by the current fleet of launch vehicles, the system generate on-resonance and off-resonance pulses prior to plume formation for measuring beyond-plume ambient return and on-resonance and off-resonance pulse during plume formation for measuring beyond-plume returns which are normalized to the ambient returns and then ratioed to indicate the absorption effect within-plume to indicate changes in gas concentrations, being well suited for analysis of environmental affect of the exhaust plumes upon the atmosphere, and particularly, for remote sensing of ozone density within the plume of Titan IV launch vehicles, but can be extended to measure other gas concentration from other types of exhaust plumes.
REFERENCES:
"Calibrated Remote Measurement of NO.sub.2 Using the Differential-Absorption Backscatter Technique", W.B. Grant, et al. Appl. Phys. Lett. vol. 24, No. 11, pp. 550-552 (Jun. 1974).
"Calibrated Remote Measurements of SO.sub.2 and O.sub.3 Using Atmospheric Backscatter", W.B. Grant, et al. J. Appl. Phys.; vol. 46, No. 7, pp. 3019-3023 (Jul. 1975).
"Mobile Lidar System for Environmental Probing", K. Fredriksson, et al. Appl. Opt., vol. 20, No. 24, pp. 4181-4189 (Dec. 1981).
"Differential Absorption Lidar Sensing of Ozone", E.V. Browell Proc. IEEE, vol. 77, No. 3, pp. 419-432 (Mar. 1989).
"Evaluation of the Effects of Mt. Pinatubo Aerosol on DIAL Measurements of Stratospheric Ozone", W. Steinbrecht, et al. J. Geophys. Res., vol. 100, No. D1, pp. 1215-1233 (Jan. 1995).
"Raman DIAL Measurements of Stratospheric Ozone in the Presence of Volcanic Aerosols", T.G. McGee et al. Geophys. Res. Lett., vol. 20, No. 10, pp. 955-958 (May 1993).
Hanig Richard
Porta David P.
Reid Derrick M.
The Aerospace Corporation
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