Other
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa21a1856g&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA21A-1856
Other
[2400] Ionosphere, [2439] Ionosphere / Ionospheric Irregularities, [2463] Ionosphere / Plasma Convection, [6994] Radio Science / Instruments And Techniques
Scientific paper
The Cascade demonstrator Small-Sat and Ionospheric Polar Explorer (CASSIOPE) satellite will be launched in 2012 and has a number of scientific objectives, one of which is to study the micro-physics of the coherent scattering process. The CASSIOPE satellite will contain a suite of eight scientific instruments comprising the enhanced Polar Outflow Probe (ePOP) mission. One instrument, the Radio Receiver Instrument (RRI), will be used in conjunction with the Saskatoon Super Dual Auroral Radar Network (SuperDARN) radar for detailed studies of the scattering volume. Plasma convection velocities in the high latitude ionosphere of the Earth are continuously monitored by the network of SuperDARN HF coherent scatter radars. These velocities are underestimated as the refractive index at the location of the scatter volume has not been taken into account. Statistical comparisons of ionospheric velocities measured by SuperDARN and by other instruments have found that velocities measured by SuperDARN are typically 20% lower than velocities measured by other instruments. Large-scale or background estimates of ionospheric electron density and refractive index can be made by other instruments; however, these instruments both do not cover the large field-of-view of the SuperDARN radars and do not provide information about the smaller-scale structures which may be very important for the scattering process. A method has been developed to use frequency shifts performed by the SuperDARN radars to directly measure the electron density in the scattering volume. These electron density measurements provide a measure of refractive index and allow an improvement to be made to the SuperDARN velocities. It has been suggested that HF coherent scatter preferentially occurs in regions of the ionosphere with small-scale structures where higher electron densities than the background are present. These small-scale structures produce the strongest irregularities from which the HF radar waves scatter. This research has provided insight into the physics behind the coherent scattering process. The launch and operational mode of the ePOP mission is highly anticipated to further confirm these results. The ePOP mission will provide extensive high resolution measurements of the scattering process of the HF radars.
Gillies R. G.
Hussey Glenn C.
McWilliams Kathryn A.
Sofko George J.
No associations
LandOfFree
Measurement of the electron density in the scattering volume of HF coherent radars using frequency shifts: SuperDARN-ePOP experiments does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Measurement of the electron density in the scattering volume of HF coherent radars using frequency shifts: SuperDARN-ePOP experiments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the electron density in the scattering volume of HF coherent radars using frequency shifts: SuperDARN-ePOP experiments will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-873580