Science Panel Perspective 1 TEMPO time-of-day and day-of-week measurements can guide monitor placement (or even guide mobile platforms in near real time) Science Panel Perspective Ports, railyards, highways Newark Airport Pandora instruments have steadily matured and are moving towards a routine and systematic monitoring network via the pandonia global network and NASA pandora project; integration within other measurements networks should be done were possible, (e.g. PAMS). Need to be prepared to verify unexpected hot spots – mobile monitoring system, pandora critical. For science and application, pandora will be key measurement to fill in the sub-hourly data. Data courtesy of Laura Judd, Jay Al-Saadi (NASA LaRC) and Scott Janz (NASA GSFC)

Science Panel Perspective 2 PANDORA NO2/H2O: captures boundary layer scales of motion – what will this mean for TEMPO validation and science? What additional assets are needed at sites? Science Panel Perspective Mesonet-NYS, Bronx NY, Windcube 100s In addition to measuring NO2 advection, Pandora is sensitive enough (1σ = 5×1013 in 10 s) to capture variations driven by large PBL eddies (up to ±1×1015 molecule cm-2 over 1-minute, or ~10%-20% of tropospheric column). Column water vapor should be a straightforward, not yet available product as well Clouds Clear-sky Eddies Bronx NY Pandora Clear-sky NO2 Advection + Large Eddies Very precise Clouds - noisy

Science Panel Perspective 3 Formaldehyde everywhere: how do we deploy Pandoras/use TEMPO to understand multi-generation HCHO production and its role or link to O3 and organic PM? Science Panel Perspective Westport CT coastal monitor HCHO Time Series 5.5 ppb UMD/GSFC Formaldehyde, 2-4:30 PM, 16 August 2018 Afternoon formaldehyde is between 5 ppb and 7 ppb nearly everywhere in the afternoon boundary layer on 8/16. The same is true on 8/15 (not shown in flight data) EPA data: Andrew Whitehill UMD/GSFC data: NESCAUM; R. Dickerson, X. Ren, T. Hanisco, J. St. Clair, G. Wolfe