Subsequent data processing is often carried out under conditions when not only techniques, but also an approach to the solution of a particular physical task are not clear. These conditions suggest interactive work when various techniques of data processing can be tested. Taking into account its advantages, we have chosen it as the base in solving of our tasks. Besides well-known methods, these programs realize some specific techniques developed by us. Astronomical instruments provide a lot of images during an event which contain a great amount of information.
Integral characteristics help to reveal essential features.
Along with the well-known total flux, we use also the effective height which can be measured either as a weighted center, or as coordinates where the second derivative has its minima. However, structural variations are masked in this case. Some additional features can be detected by means of another integral characteristic, the effective area of an emitting region computed as its flux divided by maximum of the brightness temperature over the image. Changes of the maximum of the brightness temperature describe that growth which is in fact, and the changes of flux reflect also proceeded transformations of the structure. The programs and routines have been checked under MS Windows 95 and UNIX with IDL versions since 3.0.1 to 5.0.2.