From: The temperate climate zone
Surface search != land search. Different, discrete abilities. Many older radars had no problem detecting ships at sea but could not pick out any ground targets at all. The clutter is orders of magnitude higher, the challenges are different, the signal processing and technological level necessary are different. (This is why e.g. J-STARS was a game-changer back in Desert Storm). Please read a book.
Not only we are modeling the ability of modern land search-capable radars to pick out mobile targets, we also take into account target movement (e.g. the faster a vehicle moves, the easier it is to pick out of the clutter) and sensor frequencies (higher frequency provides a sharper return and thus makes detection easier; this is part of why many modern ATGMs use MMW seekers).
It seems to me like someone is too quick to blame Command instead of understanding how things work.
Ok this and what some others have said has given me food for thought. If you're referring to the GR1's radar not being able to pick out ground moving targets then fair enough, but only some of the ground targets in the birmingham strikes scenario are actually moving- some which include two shilka platoons, an artillery battery of 105mm light guns and a battery of ssc-3 SSM launchers are stationary, as well as three inf companies.
If the GR1's radar doesnt have GMT capability then in the DB where it has abilities it shouldnt be able to provide speed information, but it clearly says it does in the DB entry.
As stated above, moving targets are easier to detect than stationary ones when dealing with ground clutter, not the opposite. You (and several other on this forum) should, as recommended above, pick up some books and read them before trying to argue that something is wrong with this simulation. Basing your understanding on how complex sensors and weapons "should" function solely from experience in video games is not particularly productive if you are trying to argue for a certain cause.
This picture is taken from an APG-76 radar with GMTI and SAR capability. The moving targets create a doppler-shift which in turn can be used to single out for example moving vehicles, presented as bright white spots. The SAR capability in turn creates the image of the surrounding terrain. Pictured are a convoy moving over a bridge at 37.8 NMI range and with 18 metre resolution. The GMT functionality has nothing to do with meassuring the speed of a target, its a way to distinguish them from the background. This radar was state of the art in the late 90´s.
This is NOT what the Gr.1 was able to produce.
The second picture is from an AN/APQ-169 radar, fitted in the F-111 for the attack role. The radar reached operational service in the middle 80´s and should be representative of what kind of information you would expect from the Gr.1. Its usable over water and otherwise flat terrain, but in the stated scenario its not much help.