These scintillations reveal density fluctuations in the interplanetary medium and can be processed to produce daily maps of the sky, highlighting regions occupied by unusually low or high density solar wind. Prospective users of the data should contact Dr Graham Woan in the first instance. As an example, here is an IPS image from April 1994, which shows the whole sky, as seen from Cambridge, in a Hammer-Aitoff projection. The ecliptic is shown yellow with the Sun at the centre.
Scintillation is expressed as the index g on a logarithmic scale.
The graph in the lower portion of the picture displays the g values of individual radio sources as a function of solar elongation. A postscript version of this image is also available. Jul Aug Sep IPS 81.5 MHz survey The source list from the Purvis et al. Please refer to the published paper for details of the column entries.