Trace Gas Retrievals from the GeoTASO Aircraft Instrument

Monday, 14 December 2015
Poster Hall (Moscone South)
Caroline R Nowlan1, Xiong Liu1, James W Leitch2, Cheng Liu1, Gonzalo Gonzalez Abad1, Kelly Chance3, Joshua Cole2, Thomas Delker2, William S Good2, Frank Murcray2, Lyle Ruppert2, Dan Soo2, Christopher Loughner4, Melanie B Follette-Cook5, Scott J Janz6, Matthew G Kowalewski7, Kenneth E Pickering6, Peter Zoogman1 and Jassim A Al-Saadi8, (1)Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States, (2)Ball Aerospace, Boulder, CO, United States, (3)Harvard-Smithsonian, Cambridge, MA, United States, (4)University of Maryland College Park, College Park, MD, United States, (5)Morgan State University, Baltimore, MD, United States, (6)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (7)Universities Space Research Association Columbia, Columbia, MD, United States, (8)NASA Langley Research Center, Hampton, VA, United States
The Geostationary Trace gas and Aerosol Sensor Optimization (GeoTASO) instrument is a passive remote sensing instrument capable of making 2-D measurements of trace gases and aerosols from aircraft. The instrument measures backscattered UV and visible radiation, allowing the retrieval of trace gas amounts below the aircraft at horizontal resolutions on the order of 250 m x 250 m. GeoTASO was originally developed under NASA’s Instrument Incubator Program as a test-bed instrument for the Geostationary Coastal and Air Pollution Events (GEO-CAPE) decadal survey mission, and is now also part of risk reduction for the upcoming Tropospheric Emissions: Monitoring of Pollution (TEMPO) and Geostationary Environment Monitoring Spectrometer (GEMS) geostationary satellite missions. We present spatially resolved observations of ozone, nitrogen dioxide, formaldehyde and sulfur dioxide over urban areas and power plants from flights during the DISCOVER-AQ field campaigns in Texas and Colorado, as well as comparisons with observations made by ground-based Pandora spectrometers, in situ monitoring instruments and other aircraft instruments deployed during these campaigns. These measurements at various times of day are providing a very useful data set for testing and improving TEMPO and GEMS retrieval algorithms, as well as demonstrating prototype validation strategies.