| 摘要 |
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.
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