Computer Science – Performance
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.a41d0143b&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #A41D-0143
Computer Science
Performance
0394 Instruments And Techniques, 0490 Trace Gases, 1610 Atmosphere (0315, 0325), 1855 Remote Sensing (1640)
Scientific paper
Measurement of CO2 mixing ratios within the planetary boundary layer will be required to validate the performance of both the Orbiting Carbon Observatory and the future ASCENDS instrument. We have adapted the well-known DIAL technique to measure CO2 mixing ratios with the PBL using the 1570 nm band of CO2 and telecom lasers and EDFA technology. The short-term focus of this effort is the development and demonstration of the technique and the technology required to make these measurements. The long-term goal is the development of a inexpensive, compact instrument constructed out of commercial off the shelf components capable of making these measurements remotely from any suitable location. The approach employs two distributed feedback diode lasers seeding a fiber amplifier that permits the sequential measurement of both the on-line (absorbed) and off-line (non-absorbed) light by CO2. A breadboard version of the instrument has been constructed using a 10W erbium doped fiber amplifier and 40 cm telescope and this has been used to retrieve CO2 over paths within the PBL. These measurements extend over multiple days and have permitted us to assess the performance of the instrument and compare its results to those of a collocated CO2 sensor. Representative samples of the data will be presented as will an assessment of the current technology.
Abshire James
Allan Guy
Burris John Jr.
Riris Haris
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