I was a D&D controller at ScATCC for 6 years until 31st July 1998 and we used the aforementioned plotter software. It is certainly not calibrated nor 'official' as it was written by DP wing at West Drayton on the back of a fag packet, basically.
Used it a lot for demonstration to U/T's and I used it twice for real crashes. It is not very accurate, only to within a mile or so (and obviously very much depends on the quality of the radar return). You use it by requesting a print out from system control of the track and radar head you want it from. Then you run up the plotter programme on a PC, input the head and the figures (essentially the range & bearing from the radar head). It then converts it to lat & long plots with a 1:50,000 map grid overlay onto an acetate sheet. You can then overlay it on to the appropriate OS map.
Apart from that inaccuracy there's the matter of radar coverage. They must surely have used the Aberdeen radar as Lowther hill is far away and GDF even further! Just look at the terrain between Aberdeen and Ben Machdui, how do they think radar works? Very unlikely to get a decent return of anything much low level, or even medium level.
Glad you guys appeared to have had the full SP on this piece of software before the prosecution talked it up in court.
Good luck but it does rather appear that the prosecution are grasping at straws and being rather ahem economical on the veracity of the kit they seem so dependent on.
End this farce now!
