Many thanks for the response so far.
This document titled Using *ASTERIX* in accident investigation explains that raw data is in fact ASTERIX data in inspector view.
Inspector view means the radar data is displayed to an aircrash investigator with no filtering at all.
http://www.isasi.org/documents/libra...-20110627.docx
I also understand that radar sensors (primary, secondary radar antennas) convert the target echo into ASTERIX message format. That is plain computer data. The UTC time is added and the data is sent over common IT-dataconnections to the air traffic control center.
There the data is processed by severall computers, archived, blended with for instance weather data and displayed to the controller
Hope I am correct