Convection Map Browser
This browser tool gives you access to plots of the ionospheric convection pattern determined from SuperDARN radar observations. Using the 'Option' menu, select to see (i) the pattern from application of the standard Map Potential algorithm (default), (ii) gridded line-of-sight velocities, or, (iii) the pattern from application of the SuperDARN Assimilative Mapping (SAM) algorithm. (What is SuperDARN Assimilative Mapping (SAM)?)
The SuperDARN Assimilative Mapping (SAM) procedure uses the "optimal interpolation" method of data assimilation to obtain complete maps of electrostatic potential by optimally combining SuperDARN observations and a statistical convection model. This method weights the contributions of the observations and the statistical model based on the respective error properties of each source of information. For time periods with few observations available, the solution will be largely determined by the statistical model. The statistical model used is the CS10 model [Cousins and Shepherd (2010), A dynamical model of high-latitude convection derived from SuperDARN plasma drift measurements, J. Geophys. Res., 115]. The SAM procedure is described in more detail by Cousins et al. (2013), SuperDARN assimilative mapping, J. Geophys. Res., 118.
NOTE: The dates may not work correctly when using the Safari browser. It is recommended using Chrome or Firefox web browsers if you have a problem viewing certain dates.