Processed csv files of NO2 vertical column density in the Houston Metropolitan Area are available for download. These files include observations from individual GCAS flights during DISCOVER-AQ-Texas (September 2013) and TROPOMI (June 2018–May 2019) averaged to underlying census tracts as described in:
Demetillo, M. A. G., Navarro, A., Knowles, K. K., Fields, K. P., Geddes, J. A., Nowlan, C. R., Sun, K., Judd, L. M., Al-Saadi, J., Diskin, G. S., McDonald, B. C., and Pusede, S. E.: Observing nitrogen dioxide air pollution inequality using high-resolution remote sensing measurement in Houston, Texas, Environ. Sci. Technol., doi:10.1021/acs.est.0c01864, 2020.
Please contact Angelique Demetillo or Sally Pusede with questions.
A README file is also available. The full DISCOVER-AQ-Texas and GCAS dataset is hosted by NASA Langley and can be accessed here. The TROPOMI NO2 L2 data can be accessed here (free to register and access).