RvEFuSiOn Posted May 11, 2010 Posted May 11, 2010 Hi all, I just wanted to know does FC2 model Radar cross section of aircrafts and surface or angular deflection too?
Pilotasso Posted May 11, 2010 Posted May 11, 2010 No, I think IMHo it has a fixed value for RCS and burn through ranges. What varies is "detectability" based on doppler efect, aspect and ground clutter. .
RvEYoda Posted May 11, 2010 Posted May 11, 2010 I believe each unit in the game has a "cross section" parameter. When a target turns or changes aspect the detection ranges are also changed yes, closure is an important parameter. Most apparent is the case for totally cold targets, where range usually isnt more than 1/3rd of head on detection range. I have heard this is taken from real Su-27 radar performance, and since no good data on rear aspect detection ranges for the F-15 radar have been provided, the F-15 is basically set to the same. S = SPARSE(m,n) abbreviates SPARSE([],[],[],m,n,0). This generates the ultimate sparse matrix, an m-by-n all zero matrix. - Matlab help on 'sparse'
Pilotasso Posted May 11, 2010 Posted May 11, 2010 (edited) I believe what Fusion is referring to is that, although RCS is a constant referrence value, when its attitude changes the energy is partialy deflected in other directions (or hide features from the emmiter altogether) making the target look like its changing RCS (though its not). I.e. you roll the aircraft and that alone may break the lock as the radar waves are reflected away or blocked against highly reflective spots of the targeted aircraft Edited May 11, 2010 by Pilotasso .
GGTharos Posted May 11, 2010 Posted May 11, 2010 Scintillation is not modeled, and likely will never be modeled. Maneuvering won't break a lock in terms of RCS changes - that is theoretically easy enough to compensate for. Aspect changes can break lock due to changes in closure, but RCS - doubtul. You'd have to be at the very edge of tracking range for that I think. [sIGPIC][/sIGPIC] Reminder: SAM = Speed Bump :D I used to play flight sims like you, but then I took a slammer to the knee - Yoda
Pilotasso Posted May 11, 2010 Posted May 11, 2010 you should try ask Pilots of various aircraft because I did get comments that scintilation does break lock. Some pilots trick their adversaries in training that way. .
Speed Posted May 11, 2010 Posted May 11, 2010 Scintillation is not modeled, and likely will never be modeled. Maneuvering won't break a lock in terms of RCS changes - that is theoretically easy enough to compensate for. Aspect changes can break lock due to changes in closure, but RCS - doubtul. You'd have to be at the very edge of tracking range for that I think. What if you fly perpendicular to the radar, "beaming" it, with no closure? That won't help to break lock? What about a chopper? Does the doppler signature of the spinning rotors help it show up on radar or not? Intelligent discourse can only begin with the honest admission of your own fallibility. Member of the Virtual Tactical Air Group: http://vtacticalairgroup.com/ Lua scripts and mods: MIssion Scripting Tools (Mist): http://forums.eagle.ru/showthread.php?t=98616 Slmod version 7.0 for DCS: World: http://forums.eagle.ru/showthread.php?t=80979 Now includes remote server administration tools for kicking, banning, loading missions, etc.
Pilotasso Posted May 11, 2010 Posted May 11, 2010 According to what i heard (remenber this is info as is I cannot confirm) the answers to both your questions is "YES". .
RvEYoda Posted May 11, 2010 Posted May 11, 2010 What about a chopper? Does the doppler signature of the spinning rotors help it show up on radar or not? RL - yes. LO - no, in Fc the doppler shift is only taken into account on the closure of the target itself. S = SPARSE(m,n) abbreviates SPARSE([],[],[],m,n,0). This generates the ultimate sparse matrix, an m-by-n all zero matrix. - Matlab help on 'sparse'
GGTharos Posted May 11, 2010 Posted May 11, 2010 Must be some pretty old/lame radars, because the amplitude change is so fast that the slightest hint of a mem-mode would allow the radar to continue tracking. That's just my theory though. you should try ask Pilots of various aircraft because I did get comments that scintilation does break lock. Some pilots trick their adversaries in training that way. [sIGPIC][/sIGPIC] Reminder: SAM = Speed Bump :D I used to play flight sims like you, but then I took a slammer to the knee - Yoda
IvanK Posted May 12, 2010 Posted May 12, 2010 (edited) Post lock scintillation wont really break a lock (as I recall from a life many moons ago APG-65) what you would see though close in is the TD box roving all over the target especially if it was big with lots of stuff hanging under the wings etc. Edited May 12, 2010 by IvanK
Pilotasso Posted May 12, 2010 Posted May 12, 2010 (edited) Im not saying you guys are wrong, I'm transmitting what I heard only, though I have to say that by mentioning F-15's radar repeatedly is like hearing stories of a rich kid spoiled by expensive toys. :) The rest of the real world deals with more realistic and modest hardware. :) The mainstream stuff is much weaker. And trust me theres tons of those lame radars laying arround still. Edited May 12, 2010 by Pilotasso .
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