Jump to Navigation

Investigation between sky noise attenuation of the Sanae SuperDARN radar and solar activity.

Sky noise data is recorded routinely by the Sanae HF radar at around 12MHz. It is usually viewed to be metadata, the primary data products of the radar being backscatter power, Doppler velocity and spectral width (determined from backscatter from ionospheric irregularities). Sky noise has sources in the atmosphere e.g. lightning and that are also anthropogenic. It would be expected that as solar activity increases, the ionosphere is thickened and, in extreme events (such as CMEs and large solar flares), the increase would lead to radio absorption and so reduction of sky noise and, in SuperDARN’s case, loss of primary data due to the radar’s signal being absorbed. One years’ sky noise data could be retrieved and analyzed by Fourier methods to determine both long term (eg seasonal and short term e.g. SPEs trends. In addition, specific solar events with varying characteristics and their effect on sky noise could be investigated. A measure of expected signal attenuation, and thus effect on loss of primary data products, could be estimated by determining a sky noise quiet day curve for each day in the year as a baseline. Further, if time permits, a comparison could also be performed between the sky noise data and the riometer data at Sanae. This investigation could be important for global ionospheric model validation and for absorption forecasting as the SuperDARN network covers large areas at mid and high latitudes.
Node This Project Is Offered On: 
Project Info: 
PDF icon sky noise project




Research Area: 
Space Physics

Available_projects | by Dr. Radut