Data and model atmosphere

The ETON campaign was launched on 23 March 1982 from the island of South Uist in Scotland (57.36°N, 7.38°W). Multiple rockets measured atomic and molecular nightglow emissions as well as the atomic oxygen density profile (17, 40). ETON payloads P230H and P227H, from which the observed O2 AB emission profiles were used here, were launched at 21:27:17 UT and 22:10:51 UT, respectively (17).

The NLTE campaign comprised two rockets launched from the Esrange Space Center (68°N, 21°E), Sweden in March 1998 (32, 41). The payload of the second rocket, NLTE-2, was launched on March 6 at 21:26:00 UT and included photometric measurements of the O2 AB emission with simultaneous monitoring of atomic oxygen.

The atmospheric composition, [N2], [O2], [H], and temperature inputs were taken from the NRLMSISE-00 model (30) for the time and date of each dataset. For the atomic oxygen profile, we used the observations of ETON payload P232H and NLTE-2 descent flight. In our discussion of possible sources of error, we will revisit the atomic oxygen profiles used.

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