Physics – Optics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa21a1520p&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SA21A-1520
Physics
Optics
0310 Airglow And Aurora, 2415 Equatorial Ionosphere, 6934 Ionospheric Propagation (0689, 2487, 3285, 4275, 4455), 6969 Remote Sensing, 6982 Tomography And Imaging (7270, 8180)
Scientific paper
Ground-based low-light optical observations are being conducted in conjunction with AFRL's C/NOFS satellite from a number of equatorial locations including Kwajalein Atoll and Christmas Island in the Pacific Ocean. These observations provide critical contextual information on ionospheric structure during and between C/NOFS overflights, in addition to coverage at latitudes and altitudes not sampled by the instruments on board the spacecraft. Some of the most pronounced optical signatures appear to result from large-scale regional lowering of the F-region, which results in a drastic regional collapse of F-region densities as measured by the C/NOFS Planar Langmuir Probe instrument over several successive orbits. Many of the plumes apparent in the optics are associated with only weak scintillation effects, even at VHF frequencies, as expected at solar minimum. We will also present observations from a dedicated C/NOFS ground measurement campaign making use of the ALTAIR radar in Kwajalein.
Beach T.
Groves K.
Hunton D.
Pedersen Ted
Roddy P.
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