Long, R., M. Beaver, R. Duvall, Jim Szykman, S. Kaushik, K. Kronmiller, M. Wheeler, S. Garvey, AND J. Crawford. Evaluation and Comparison of Methods for Measuring Ozone and NO2 Concentrations in Ambient Air during DISCOVER-AQ. EM Magazine. Air and Waste Management Association, Pittsburgh, PA, , 1-11, (2016).

Crawford, J., J. Al-Saadi, G. Pierce, R. Long, Jim Szykman, J. Leitch, C. Nowlan, J. Herman, AND A. Weinheimer. Multi-perspective observations of NO2 over the Denver area during DISCOVER-AQ: Insights for future monitoring. EM: AIR AND WASTE MANAGEMENT ASSOCIATION'S MAGAZINE FOR ENVIRONMENTAL MANAGERS. Air & Waste Management Association, Pittsburgh, PA, , August, (2016).

Nowlan, C., X. Lu, J. Leitch, K. Chance, G. González Abad, C. Lu, P. Zoogman, J. Cole, T. Delker, W. Good, F. Murcray, L. Ruppert, D. Soo, M. Follette-Cook, S. Janz, M. Kowalewski, C. Loughner, K. Pickering, J. Herman, M. Beaver, R. Long, Jim Szykman, L. Judd, P. Kelley, W. Luke, X. Ren, AND J. Al-Saadi. Nitrogen dioxide observations from the Geostationary Trace gas and Aerosol Sensor Optimization (GeoTASO) airborne instrument: Retrieval algorithm and measurements during DISCOVER-AQ Texas 2013. Atmospheric Measurement Techniques. Copernicus Publications, Katlenburg-Lindau, Germany, 9(6):2647-2668, (2016).

Duvall, R., R. Long, M. Beaver, K. Kronmillwe, M. Wheeler, Jim Szykman, M. Silverman, AND J. Crawford. Performance Evaluation and Community Application of Low-Cost Sensors for Ozone and Nitrogen Dioxide. Sensors. MDPI, Basel, Switzerland, 16(10):1698, (2016).

Szykman, Jim, R. Long, R. Duvall, T. Knepp, M. Beaver, K. Cavender, R. Clarke, AND E. Olsen. The use of LIDAR Technology for Measuring Mixing Heights under the Photochemical Assessment Monitoring Program; leveraging research under the joint DISCOVER-AQ/FRAPPÉ Missions. EM: AIR AND WASTE MANAGEMENT ASSOCIATION'S MAGAZINE FOR ENVIRONMENTAL MANAGERS. Air & Waste Management Association, Pittsburgh, PA, , 1-7, (2016).

Long, R., M. Beaver, R. Duvall, EricS Hall, S. Kaushik, K. Kronmiller, M. Wheeler, AND S. Garvey. Evaluation and Comparison of Chemiluminescence and UV Photometric Methods for Measuring Ozone Concentrations in Ambient Air. In Proceedings, 2015 (108th) A&WMA Annual Conference, Raleigh, NC, June 22 - 25, 2015. Air and Waste Management Association, Pittsburgh, PA, 546, (2015).

Williams, R., R. Long, M. Beaver, R. Duvall, G. Hagler, Sue Kimbrough, E. Thoma, Bill Mitchell, W. Jiao, A. Kaufman, J. Rice, T. Hanley, AND S. Garvey. Sensor Technology and Performance Characteristics. AWMA 2015 Meeting, Raleigh, NC, June 22, 2015.

Williams, R., D. Costa, A. Brown, A. Kaufman, D. Buchbinder, G. Hagler, E. Thoma, Bill Mitchell, B. Gullett, W. Jiao, Vasu Kilaru, R. Long, M. Beaver, R. Duvall, P. Solomon, K. Leovic, E. Smith, L. Stanek, Tim Watkins, P. Preuss, S. Katz, G. Robarge, E. Snyder, B. Sharpe, AND S. Garvey. #2) Sensor Technology-State of the Science. Webinar Presentation - Sensor Technology-State of the Science, Research Triangle Park, NC, July 08, 2014.

Beaver, M., R. Long, K. Kronmiller, R. Duvall, S. Kaushik, T. Morphy, AND P. King. Ambient intercomparison of direct and indirect methods for ambient nitrogen dioxide. National Ambient Monitoring Conference, Atlanta, GA, August 11 - 14, 2014.

Beaver, M., R. Long, Jim Szykman, R. Duvall, K. Baker, J. Kelly, A. Weinheimer, D. Knapp, D. Montzka, S. Pusede, AND R. Cohen. DISCOVER-AQ SJV Surface Measurements and Initial Comparisons with Photochemical Model Simulations. CMAS Conference, Chapel Hill, NC, October 27 - 29, 2014.

Knepp, T., M. Pippin, J. Crawford, Jim Szykman, R. Long, L. Cowen, A. Cede, N. Abuhassan, J. Herman, R. Delgado, J. Compton, T. Berkoff, J. Fishman, D. Martins, R. Stauffer, A. Thompson, A. Weinheimer, D. Knapp, D. Montzka, D. Lenschow, AND D. Neil. Estimating Surface NO2 and SO2 Mixing Ratios from Fast-Response Total Column Observations and Potential Application to Geostationary Missions. JOURNAL OF ATMOSPHERIC CHEMISTRY. Springer, New York, NY, 0(0):1-26, (2014).

Duvall, R., R. Long, M. Beaver, EricS Hall, J. Szykman, AND S. Kaushik. Evaluation of small sensor technology for criteria air pollutants at ground-based sites and a citizen science network. National Ambient Air Monitoring Conference, Atlanta, GA, August 11 - 14, 2014.

Hall, E., S. Kaushik, R. Vanderpool, R. Duvall, M. Beaver, R. Long, AND P. Solomon. Integrating Sensor Monitoring Technology into the Current Air Pollution Regulatory Support Paradigm: Practical Considerations. American Journal of Environmental Engineering. Scientific & Academic Publishing, Rosemead, CA, 4(6):147-154, (2014).

Williams, R., Tim Watkins, AND R. Long. Low Cost Sensor Calibration Options. EM: AIR AND WASTE MANAGEMENT ASSOCIATION'S MAGAZINE FOR ENVIRONMENTAL MANAGERS. Air & Waste Management Association, Pittsburgh, PA, , 10-15, (2014).

Williams, R., R. Long, M. Beaver, R. Duvall, Sue Kimbrough, E. Thoma, Bill Mitchell, J. Rice, T. Hanley, AND S. Garvey. Observations from Laboratory and Field-based Evaluations of Select Low Cost Sensor Performance. 2014 International Society of Exposure Science, Cincinnati, OH, October 12 - 16, 2014.

Long, R., E. Hall, M. Beaver, R. Duvall, S. Kaushik, K. Kronmiller, M. Wheeler, S. Garvey, Z. Drake, AND F. McElroy. Performance of the Proposed New Federal Reference Methods for Measuring Ozone Concentrations in Ambient Air. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-14/432 (NTIS PB2015-101240), 2014.

Long, R., M. Beaver, R. Williams, K. Kronmiller, AND S. Garvey. Procedures and Concepts of EPA's Ongoing Sensor Evaluation Efforts. EM: AIR AND WASTE MANAGEMENT ASSOCIATION'S MAGAZINE FOR ENVIRONMENTAL MANAGERS. Air & Waste Management Association, Pittsburgh, PA, , 8-9, (2014).

Long, R., M. Beaver, R. Duvall, EricS Hall, AND S. Kaushik. Review of Federal Reference Method for Ozone: Nitric Oxide-Chemiluminescence. CASAC AMMS Teleconference on Federal Reference Method for Ozone: Nitric Oxide-Chemiluminescene, Research Triangle Park, NC, April 03, 2014.

Long, R., M. Beaver, R. Duvall, EricS Hall, AND S. Kaushik. Review of Federal Reference Method for Ozone: Nitric Oxide-Chemiluminescence:Supplemental Material for CASAC AMMS. CASAC AMMS Teleconference on Federal Reference Method for Ozone, Washington, DC, June 12, 2014.

Williams, R., R. Long, M. Beaver, A. Kaufman, F. Zeiger, M. Heimbinder, I. Hang, R. Yap, B. Acharya, B. Ginwald, K. Kupcho, S. Robinson, O. Zaouak, B. Aubert, M. Hannigan, R. Piedrahita, N. Masson, B. Moran, M. Rook, P. Heppner, C. Cogar, N. Nikzad, AND W. Griswold. Sensor Evaluation Report. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-14/143 (NTIS PB2015-100611), 2014.

Williams, R., R. Long, M. Beaver, G. Hagler, Sue Kimbrough, E. Thoma, Bill Mitchell, T. Hanley, J. Rice, S. Garvey, B. Sharpe, W. Jiao, AND K. Kronmiller. Sensor Technology Performance Characteristics- Field and Laboratory Observations. 2014 Air Sensors Workshop, Research Triangle Park, NC, June 09 - 10, 2014.

Williams, R., R. Long, M. Beaver, A. Kaufman, T. Hanley, J. Rice, AND S. Garvey. The State of Sensor Technology and Air Quality Monitoring. Presented at National Environmental Monitoring Conference, Washington, DC, August 04 - 08, 2014.

Beaver, M., K. Kronmiller, R. Duvall, S. Kaushik, T. Morphy, P. King, AND R. Long. Direct and Indirect Methods for the Measurement of Ambient Nitrogen Dioxide. Presented at AWMA Measurement Technologies meeting, Sacramento, CA, November 19 - 21, 2013.

Beaver, M., K. Kronmiller, R. Duvall, S. Kaushik, T. Morphy, P. King, AND R. Long. Direct and Indirect Methods for the Measurement of Nitrogen Dioxide (NO2). Presented at AWMA Measurements Meeting, Sacramento, CA, November 20, 2013.

HALL, ERICS, M. BEAVER, R. W. LONG, AND R. W. VANDERPOOL. EPA's Reference and Equivalent Supporting NAAQS Implementation through Methods Research Program: Research, Development, and Analysis. EM: AIR AND WASTE MANAGEMENT ASSOCIATION'S MAGAZINE FOR ENVIRONMENTAL MANAGERS. Air & Waste Management Association, Pittsburgh, PA, 5(May 2012):8-12, (2012).