One of the networks that use this had a segment on one of their sports
programs showing how this was done. It is very elaborate involving
multiple cameras and the use of computers, requires one large remote
truck and a variety of technicians. Sorry I can't remember more about
it. You may want to look at a website for the networks that use these and
see if they have any information.
Jerry Lisantti lisantti@physics.centenary.edu
Dept. of Physics and Engineering http://alpha.centenary.edu
Centenary College of Louisiana
Shreveport, LA 71134
318.869.5219