GGTharos Posted January 6, 2005 Posted January 6, 2005 http://www.crows.org/goldcrows/web/ewtutor1.htm Please look at the various jamming methods and results. Would it be possible to model this in LOMAC in say, 1.2 for example? I find it MOST interesting that a radar can be deceived to some degree by flying formation at a specific dispersal. It would be cool if the radar ended up displaying a huge target all the sudden as all the aircraft (or at least some) ended up being being separated by one beamwidth in their formation! Some fuzzification of the simulated radar return would be required to make this happen ... anyway. Is this even computationally feasible? [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
Skywall23 Posted January 6, 2005 Posted January 6, 2005 GGTharos is addicted to provide feedback to the dev.s :o :lol: :P :twisted: :wink:
Trident Posted January 6, 2005 Posted January 6, 2005 It should be IMHO, infact JF/A-18 did it AFAIK. I think SwingKid has it covered as 'finite angular and range resolution' in the F-15C avionics wishlist.
GGTharos Posted January 6, 2005 Author Posted January 6, 2005 I think there's a little mroe to it than that (that is, you could simulate two targets merging into a single, but what about a formation of aircraft appearing the size of an INdependence day UFO? you'd have to attack that thing using GM! ;) ) [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
sickboy Posted January 6, 2005 Posted January 6, 2005 such persistance!! i vote we make GGTharos work for world peace!!! he might well be 'the one'....hehhehe.... to make it work!!! :lol:
BIOLOG Posted January 7, 2005 Posted January 7, 2005 LMAO... I say yes! The bird of Hermes is my name eating my wings to make me tame.
GGTharos Posted January 7, 2005 Author Posted January 7, 2005 World Peace ... no problem! One World Peace coming up! ;) Devs ... can you give me a hand with this 'World Peace' Simulation? [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
Brit_Radar_Dude Posted January 7, 2005 Posted January 7, 2005 Tricky for primary radar to seperate close formation a/c, especially in azimuth. Quite common for close formation a/c to appear as one big one. And secondary radar transponder codes wont help either. A flight would usually all have the same Mode 3/A code allocated and whilst in tight formation, only the flight leader would have his transponder switched on. [sIGPIC][/sIGPIC] Sorry Death, you lose! It was Professor Plum....
GGTharos Posted January 7, 2005 Author Posted January 7, 2005 It strictly depends on the formation spacing actually, specifically the spacing needs to have the AC about 1 beam width apart. This distance changes with range to target. [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
169th_Jaws Posted January 7, 2005 Posted January 7, 2005 Don't real F-15 radars have a 'sort' function which zooms in on a selected segment of the radar display to separate targets? Or is my brain just making up things again?? Just when you thought it was safe to go back over the water... Flight Lieutenant "Jaws" 169th Panthers
GGTharos Posted January 7, 2005 Author Posted January 7, 2005 And that's the difference between digital and analog radars ;) The sim might be able to emphasize such things. [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
Trident Posted January 7, 2005 Posted January 7, 2005 There's Sort and there's RAID AFAIK. IIRC Sort simply zooms in the display in the cockpit to allow the pilot to better discern closely spaced contacts, but this does not change the limited resolution of the radar - aircraft flying less than a beamwidth apart will still appear as one. RAID (Matt calls it RAM in the F-15 avionics thread) uses doppler beam sharpening to even resolve such contacts, if I'm not mistaken. I might have the terminology wrong though, they may describe the same thing for different radar sets (e.g. what's called RAID on some is called RAM on the APG-70).
SwingKid Posted January 7, 2005 Posted January 7, 2005 I've been trying find solid data on "Sort" mode for months. From everything I've seen, it doesn't zoom the radar display at all, or do anything special for target break-out that I can tell - just changes the scan azimuth. Very confusing. And RAM is somethingly completely different, obsolete and not even there anymore. -SK
GGTharos Posted January 7, 2005 Author Posted January 7, 2005 I think ti changes the beam width definition (because the definition is artificial) ... normally the beam width is defined as the centerline and everything within half-power (.707) of the beam centerline. You can change the beam width JUST by changing this definition. THat's one way I see, but I'm not radar expert - the may be more ways, such as pulse and power modulation to alter the apparent beam width. Basically what happens is that the beam width is the limit of the resolution of the radar and if you have two fighters 1 beam width apart they'll show up as a large single. [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
Trident Posted January 7, 2005 Posted January 7, 2005 I've been trying find solid data on "Sort" mode for months. From everything I've seen, it doesn't zoom the radar display at all, or do anything special for target break-out that I can tell - just changes the scan azimuth. Very confusing. And RAM is somethingly completely different, obsolete and not even there anymore. So the RAM mode Matt talked about is not related to this doppler sharpening job (i.e. RAID)? How does it work then? Mind you, I'm not positive that 'RAID' is indeed the technique I described but I remember reading that that's what it is.
SwingKid Posted January 7, 2005 Posted January 7, 2005 RAM was apparently just an ancestor of TWS for Commodore 64-level processor technology. It allowed the 1970s APG-63(psp) to maintain track on up to four targets, interleaved with normal scanning. Apparently, some of the text about how revolutionary it was at the time is still in public circulation today. RAID and RCR may be something newer, but they are absent from F-15 and I have no data about them. -SK
Recommended Posts