Hei, Matthew A.Bernhardt, Paul A.Siefring, Carl L.Wilkens, Matthew R.Huba, Joseph D.Krall, Jonathan F.Valladares, Cesar E.Heelis, Roderick A.Hairston, Marc R.Coley, W. RobinChau Chong Shing, Jorge LuisDe la Jara, César2018-06-282018-06-282014-01-15Hei, M. A., Bernhardt, P. A., Siefring, C. L., Wilkens, M. R., Huba, J. D., Krall, J. F., ... De la Jara, C. (2014). Radio-tomographic images of postmidnight equatorial plasma depletions.==$Geophysical Research Letters, 41$==(1), 13-19. https://doi.org/10.1002/2013GL056112index-oti2018http://hdl.handle.net/20.500.12816/1565For the first time, equatorial plasma depletions (EPDs) have been imaged in the longitude-altitude plane using radiotomography. High-resolution (~10 km) reconstructions of electron density were derived from total electron content (TEC) measurements provided by a receiver array in Peru. TEC data were obtained from VHF/UHF signals transmitted by the C/NOFS CERTO beacon. EPDs generated pre-midnight were observed near dawn. On one night, the bubble densities were highly reduced, 100-1000 km wide, and embedded within a layerlike ionosphere. Three nights later, the EPDs exhibited similar features, but were embedded in a locally uplifted ionosphere. The C/NOFS in-situ instruments detected a dawn depletion where the reconstruction showed lifted EPDs, implying that the postmidnight electric fields raised sections of ionosphere to altitudes where embedded/reactivated fossil-EPDs were detected as dawn depletions. Satellites flying under domelike distortions of the ionosphere may observe these distortions as Broad Plasma Decreases (BPDs).application/pdfenginfo:eu-repo/semantics/restrictedAccessEquatorial plasma depletionsTomographyEquatorial ionosphereCERTO beaconC/NOFS satelliteinfo:eu-repo/semantics/articlehttp://purl.org/pe-repo/ocde/ford#1.05.01Geophysical Research Lettershttps://doi.org/10.1002/2013GL056112