Laser Sounder for Active Remote Sensing Measurements of CO2 Concentrations (original) (raw)
2008, 2008 IEEE Aerospace Conference
We report on progress of our C02 laser sounder laboratory breadboard system the goal of which is to measure the integrated column abundance of C02 to better than 1 ppm from low Earth orbit globally, measuring at all latitudes and seasons through day and night. The challenge for an orbiting C02 instrument is to achieve high precision not high sensitivity. We have made simple yet significant improvements to our active, optical-sensing laser-sounder instrument and real-time data processing that now enables absolute absorption measurements to better than ± 0.050O for over 10 hours before re-calibration (equivalent to a lppm precision from orbit). Data from an eight day, 0.8 Km open path comparison test with a LICOR shows excellent agreement.12
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