edu.ucar.opensky::articles:25729 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T20:04:54.761696 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7959nbd Constraining the upper level vibrational populations of the N2 Lyman-Birge-Hopfield band system using GOLD mission's dayglow observations 2022-09-01T00:00:00Z publication https://n2t.org/ark:/85065/d7959nbd https://doi.org/10.1029/2021JA029869 Aryal, S. author Evans, J. S. author Ajello, J. M. author Solomon, Stanley C. author Burns, Alan author Eastes, R. author McClintock, W. author UCAR/NCAR - Library publisher Current and previous thermospheric remote sensing missions use N-2 Lyman-Birge-Hopfield (LBH) band dayglow emission measurements to retrieve line-of-sight thermospheric composition and temperature. The precision of thermospheric composition and temperature retrieved from observations depends on the uncertainty in the relative LBH vibrational populations. In the laboratory, electron impact induced LBH emission measurements have shown that the relative vibrational populations change with gas pressure. However, it is not fully understood how these populations change for dayglow observations where the emissions that contribute to the observations vary with solar illumination and line-of-sight geometry. We quantify the relative vibrational populations as a function of solar zenith angle (SZA) and tangent altitude using Global-scale Observations of Limb and Disk mission's LBH dayglow observations. We find that, while some lower vibrational levels show potential enhancement with increasing pressure (decreasing altitude), in general, they do not change significantly with SZA or tangent altitude for dayglow observations. The vibrational populations can thus be assumed as fixed parameters when retrieving neutral disk temperatures from remotely sensed LBH dayglow observations. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2022 American Geophysical Union. None eng geoscientificInformation