Hysell, D. L.Hedden, R. B.Chau Chong Shing, Jorge LuisGalindo, F. R.Roddy, P. A.Pfaff, R. F.2018-07-192018-07-192009-07-11Hysell, D. L., Hedden, R. B., Chau, J. L., Galindo, F. R., Roddy, P. A., & Pfaff, R. F. (2009). Comparing F region ionospheric irregularity observations from C/NOFS and Jicamarca.==$Geophysical Research Letters, 36$==(18), L00C01. https://doi.org/10.1029/2009GL038983index-oti2018http://hdl.handle.net/20.500.12816/1964Observations of plasma density irregularities associated with equatorial spread F (ESF) have been made using the Jicamarca Radio Observatory and the Plasma Langmuir Probe (PLP) and Vector Electric Field Instrument (VEFI) instruments on the Communications Navigation Outage Forecast System (C/NOFS) satellite during a close spatio-temporal conjunction. The radar data resolution is of the order of 1 km and a few sec. in space and time, respectively. We find that coherent scatter intensifications at these scales are coincident and collocated with plasma density depletions as determined by C/NOFS. The Doppler shifts of the localized echoes are also comparable to the vertical components of the E × B plasma drifts. The strongest backscatter does not necessarily come from the deepest or most rapidly convecting depletions. This implies a complex relationship between coherent backscatter and the underlying state parameters in the ionospheric plasma.application/pdfenginfo:eu-repo/semantics/restrictedAccessSpread FIrregularitiesCoherent scatterinfo:eu-repo/semantics/articlehttp://purl.org/pe-repo/ocde/ford#1.05.01Geophysical Research Lettershttps://doi.org/10.1029/2009GL038983