Accession Number : ADA587074


Title :   Multisite Optical Imaging of Artificial Ionospheric Plasmas (Postprint)


Descriptive Note : Journal article


Corporate Author : AIR FORCE RESEARCH LAB KIRTLAND AFB NM SPACE VEHICLES DIRECTORATE


Personal Author(s) : Petersen, Todd R ; Holmes, Jeffrey M ; Gustavsson, Bjorn ; Mills, Travis J


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a587074.pdf


Report Date : 09 Nov 2011


Pagination or Media Count : 8


Abstract : Artificial ionospheric plasmas are formed on the bottom side of the natural ionospheric F region during high-power high-frequency (HF) heating experiments and descend to altitudes as low as 140 km before disappearing. Optical emissions produced during these events often exhibit bull s-eye structures, where the artificial plasma is thought to form a central spot that diverts or blocks HF waves to form an empty ring of emissions from the natural ionosphere at higher altitudes. We present multisite image data showing that, in some cases, both the spot and rig represent distinct artificial plasma layers.


Descriptors :   *IONOSPHERE , *OPTICAL IMAGES , *PLASMAS(PHYSICS) , ALTITUDE , F REGION , HIGH FREQUENCY , HIGH POWER , RINGS , WAVE PROPAGATION


Subject Categories : Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE