Abstract
NASA Langley Research Center (LaRC) developed a double pulsed, high energy 2-micron Integrated Path Differential Absorption (IPDA) lidar instrument to measure atmospheric CO2 column density. The 2-μm double pulsed IPDA lidar was flown ten times in March and April of 2014. It was determined that the IPDA lidar measurement is in good agreement with an in-situ CO2 measurement by a collocated NOAA flight. The average column CO2 density difference between the IPDA lidar measurements and the NOAA air samples is 1.48ppm in the flight altitudes of 3 to 6.1 km.
Highlights
NASA Langley Research Center (LaRC) has developed a double-pulsed, high energy, 2-micron direct detection Integrated Path Differential Absorption (IPDA) lidar instrument (Yu et al)
The CO2 column dry mixing ratio is derived from the IPDA lidar measurement and available meteorological data profiles
This paper describes the measurement results of the 2-micron pulsed IPDA lidar instrument during this airborne campaign demonstration
Summary
NASA Langley Research Center (LaRC) has developed a double-pulsed, high energy, 2-micron direct detection IPDA lidar instrument (Yu et al). Lidars operating in the 2 μm band offer high nearsurface CO2 measurement sensitivity due to the intrinsically stronger absorption lines (Menzies and Tratt 2003, Caron and Durand 2009). The objective of the airborne demonstration of the newly developed 2-micron pulsed IPDA lidar is to demonstrate the functionality and capability of the lidar instrument. The airborne IPDA lidar made measurements at different flight altitudes up to 8.3 km limited by aircraft capability and different ground target conditions such as vegetation, soil, ocean surface, snow and sand, and different cloud conditions. This paper describes the measurement results of the 2-micron pulsed IPDA lidar instrument during this airborne campaign demonstration
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