The Atmospheric Science Data Center (ASDC) has released data for the Stratosphere-Troposphere Exchange Project (STEP). STEP had two mission objectives: Investigate mechanisms and rates of irreversible transfer of mass, trace gases, and aerosols from troposphere to stratosphere and in the lower stratosphere; and explain the observed dryness of the stratosphere. Two deployments took place with U-2 flights in April to May 1984, while the ER-2 flights were conducted from January to February 1987 in and around Darwin, Australia. While data is available for the NASA ER-2, there is no data archived for the NASA U-2, however, it was noted that the U-2 measured horizontal wind, temperature, pressure, water vapor, ozone, and cloud condensation nuclei (CCN).
Data Access:
STEP Landing Page: https://doi.org/10.5067/SUBORBITAL/STEP/DATA001
Earthdata Search: https://search.earthdata.nasa.gov/search?fpj=STEP
Direct Data Download: https://asdc.larc.nasa.gov/data/STEP/
STEP Data Release Announcement
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