edu.ucar.opensky::articles:23571 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T15:04:59.559762 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7rn3c40 Initial observations by the GOLD mission 2020-07-26T00:00:00Z publication https://n2t.org/ark:/85065/d7rn3c40 https://doi.org/10.1029/2020JA027823 Eastes, R. W. author McClintock, W. E. author Burns, Alan author Anderson, D. N. author Andersson, L. author Aryal, S. author Budzien, S. A. author Cai, Xuguang author Codrescu, M. V. author Correira, J. T. author Daniell, R. E. author Dymond, K. F. author England, S. L. author Eparvier, F. G. author Evans, J. S. author Foroosh, H. author Gan, Q. author Greer, K. R. author Karan, D. K. author Krywonos, A. author Laskar, F. I. author Lumpe, J. D. author Martinis, C. R. author McPhate, J. B. author Oberheide, J. author Siegmund, O. H. author Solomon, Stanley C. author Veibel, V. author Woods, T. N. author UCAR/NCAR - Library publisher The NASA Global-scale Observations of the Limb and Disk (GOLD) mission has flown an ultraviolet-imaging spectrograph on SES-14, a communications satellite in geostationary orbit at 47.5 degrees W longitude. That instrument observes the Earth's far ultraviolet (FUV) airglow at similar to 134-162 nm using two identical channels. The observations performed include limb scans, stellar occultations, and images of the sunlit and nightside disk from 6:10 to 00:40 universal time each day. Initial analyses reveal interesting and unexpected results as well as the potential for further studies of the Earth's thermosphere-ionosphere system and its responses to solar-geomagnetic forcing and atmospheric dynamics. Thermospheric composition ratios for major constituents, O and N-2, temperatures near 160 km, and exospheric temperatures are retrieved from the daytime observations. Molecular oxygen (O-2) densities are measured using stellar occultations. At night, emission from radiative recombination in the ionosphericFregion is used to quantify ionospheric density variations in the equatorial ionization anomaly (EIA). Regions of depletedFregion electron density are frequently evident, even during the current solar minimum. These depletions are caused by the "plasma fountain effect" and are associated with the instabilities, scintillations, or "spreadF" seen in other types of observations, and GOLD makes unique observations for their study. 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 author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation