NASA’s Armstrong Flight Research Center ER-2 #809 high-altitude aircraft prepped for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights in Palmdale, CA.

NASA's Armstrong Flight Research Center ER-2 pilot Gary Toroni and engineering technician Raul "Corky" Cortes preparing for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights in Palmdale, CA on June 17, 2021.

NASA's Armstrong Flight Research Center operates ER-2 #809 high-altitude aircraft for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights on June 17, 2021.

NASA's Armstrong Flight Research Center ER-2 #809 high-altitude aircraft prepared for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights in Palmdale, CA on June 17, 2021.

NASA’s Armstrong Flight Research Center ER-2 #809 high-altitude aircraft maintained by avionics technician Gregory Bantalin for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights.

NASA's Armstrong Flight Research Center ER-2 #809 high-altitude aircraft prepped for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights in Palmdale, CA.

NASA's Armstrong Flight Research Center ER-2 #809 high-altitude aircraft prepped for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights in Palmdale, CA.

Particle Analysis by Laser Mass Spectrometry or PALMS instrument maintained by Dave Thomson and Justin Jacquot of Purdue University as part of NASA's Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) mission

NASA's Armstrong Flight Research Center ER-2 #809 high-altitude aircraft prepared for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights in Palmdale, CA on June 17, 2021

NASA’s Armstrong Flight Research Center ER-2 #809 high-altitude aircraft taking off for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights in Palmdale, CA on June 17, 2021.

NASA's Armstrong Flight Research Center ER-2 #809 high-altitude aircraft prepped for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights in Palmdale, CA.

NASA’s Armstrong Flight Research Center operates ER-2 #809 high-altitude aircraft for Dynamics and Chemistry of the Summer Stratosphere (DCOTSS) science flights on June 17, 2021.

NASA’s ER-2 aircraft performs a check flight for the Dynamics and Chemistry of the Summer Stratosphere, or DCOTSS, 2022 campaign on May 13, 2022.

NASA's ER-2 high altitude aircraft takes off from Armstrong Flight Research Center Building 703 in Palmdale, California to perform a check flight for the the Dynamics and Chemistry of the Summer Stratosphere, or DCOTSS, 2022 campaign on May 13, 2022.

The Harvard Halogen Instrument (HAL) is prepared for integration on NASA's ER-2 by electrical engineer Marco Rivero and mechanical engineer Michael Greenberg for the Dynamics and Chemistry of the Summer Stratosphere, or DCOTSS, 2022 campaign.

NASA's ER-2 aircraft is prepared for a check flight by Eric Hintsa, scientist of the Unmanned Aircraft Systems (UAS) Chromatograph for Atmospheric Trace Species (UCATS) instrument, on May 13, 2022.

NASA's ER-2 aircraft is prepared for a check flight by Principal Investigator, Bruce Daube and co-principal investigator, Jasna Pitman, of the Harvard Picarro Cavity Ring Down Spectrometer (HUPCRS) instrument on May 13, 2022.

NASA's ER-2 aircraft receives a liquid oxygen refill (LOX) by engineer technician Octavio Provincia-Salazar. Liquid oxygen is used to supply the pilot with substantial oxygen for flight without additional weight.

NASA ER-2 pilot Tim Williams prepares for a check flight with life support on May 13, 2022.

NASA's ER-2 and SOFIA at Armstrong Flight Research Center Building 703 in Palmdale, California.