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Muchocracker

ED Closed Beta Testers Team
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Everything posted by Muchocracker

  1. It has to be wide enough to encompass the spectra at any point in time or you get leakage past the clutter canceller notches and the rejection filter. When the antenna is pointing farther and farther away from the aircraft's velocity the main lobe clutter spectra significantly widens. GMT's and their center doppler frequency also get shifted farther away from the MLC. Close range sidelobes also have to be considered with this. It's 133 knots wide for added tolerance.
  2. The radome is designed to be transparent to radio waves in the frequency range that the radar operates in. It will not reflect any notable amount of energy back at the antenna that wouldn't be just folded under the transmitter spillover. I would like to provide a clarification on the topic of "Zero doppler" because i believe calling the MLC filter this is not only misleading but factually incorrect, and further contributes to confusion and misunderstanding on how pulse doppler radars work. For a moving platform, the ground will always have an amount of radial velocity with exception to 90's down, and 90 degree's to the side of the platform's velocity. And the doppler shift produced is a direct relationship of that. Straight ahead of the aircraft the doppler shift of the ground is going to be nearly inverse of its own velocity and it decreases closer to zero as the angle increases towards 90. stimsons introduction to airborne radar For a scanning radar this results in the spectra of the main lobe clutter to shift as the antenna is moving and as the velocity of the aircraft changes. It almost never stays in the exact same place (in doppler frequency) What "Zero" doppler actually looks like is the altitude return, coming from the sidelobes straight below the aircraft. And the transmitter spillover. It's not impossible to detect targets in this region but it requires the targets to be very close to the radar in order to have its return strength overpower the clutter. The main reason why the MLC region is wholesale excluded from further processing is not because of the MLC itself (you're not detecting targets in there anyway), but ground moving targets. GMT's are a gigantic clutter and airborne target discrimination issue (albeit not as much of an issue for HPRF as MPRF) that is not considered or even known about by most of the DCS space. The actual MLC spectra is typically only going to encompass an envelope of a few hundred Hz, but the MLC filter has to be made a few Kilo-Hz to cover the region where GMT's are likely to appear and to reject them. All of this generally applies to search modes and not Single Target Track or illumination modes for reasons not relevant here. It's not hardware, it's a fundamental property of EM physics. When Discriminating targets based on doppler alone it is impossible to detect targets if their doppler shift equals and is buried by main lobe clutter. There is nothing the radar can do that will change that. Range discrimination will be the only way to detect this target, and that's where MPRF tries to bridge the gap between LPRF and HPRF (but is not immune to notching and creates its own drawbacks).
  3. Describe the behavior. And post trackfiles demonstrating the issue. "Doesnt work" isnt helpful
  4. this thread is redundent
  5. You dont just set it to any random code. It has to match the code on the weapon.
  6. If 1688 doesnt work then the weapon is set to a different code. Or somebody else is also on the same code causing interference.
  7. Seeing a sidelobe band that doesn't actually have a purpose is a bit of an exaggeration of a "Basic feature".
  8. I would be careful using the quaggles dataminer because a lot of the formatting, comments, and some of the tables are not included in the files because the dataminer is pulling the data from memory when the game is started. It makes it hard to read and there could be stuff missing. Aim-7 is one of the few lua files we have acces to in the root install under coremods/aircraft/aircraft weapon pack. That mass value under the "AIM_7_FM" table in the aim7family lua file i don't believe gets used. Because it's inside of a function that gets copied across all of the aim-7 variants. It's likely some kind of default number that gets used if there is no mass value defined elsewhere in that variant missile's config. null
  9. please re-produce it and drop a tack. There is no other way i can help diagnose otherwise. There can be a hundred different legitimate reasons that it wasn't able to detect that target
  10. -This is not an ownship RADAR contributed trackfile, otherwise it would be a top half symbol with a number inside of the middle to signify it being ranked. Are you sure you turned link-16 off and not link 4 by mistake? -It's really hard to tell from this tiny image but it looks like the elevation is set too low at 4 thousand max and the target is at double digit altitudes. -The target is beaming
  11. 120's fuse is set to 15 meters. Looks like it's within it to me but you should post the track of this or the tacview file.
  12. Muchocracker

    acls

    from 6000 it's really tight on the time so i recommend doing the commence early before you start the descent and immediately hit the platform call as soon as you cross 5 thousand.
  13. there was no patch note for it. Of course it wasnt going to be fixed.
  14. I'd like to not get sniped by the NDA so no comment
  15. Far as anybody knows it's not something that's been proven with any primary source evidence. It's certainly possible to do so theoretically. Just gonna have to wait and see on this one. It'd be hella cool if we could tho.
  16. What would the practical difference even be here vs pre-briefed using HRM pullup selection. The mechanization is already there to send it at a steerpoint and HRM pullup will let it off at any angle inside of the DLZ. I feel like this may be just switchology and terms being changed at some point, either before or after and ED just used the documentation they could find.
  17. It's the automatic acquisition mode and or command into STT if you're in RWS or TWS. In RWS AACQ is a system roe matrix'd highest threat target the radar has and is signified by the large green cross. If you command AACQ it will command STT on that target. In TWS it just commands STT on the current L&S. All of this is specific to A2A mode and radar selected. SCS is a multi-function and context dependent switch. It will do different things based on master mode, DDI, and sensor selection. If you're looking for a2g specific SCS functions then you need to look at that specific system. Putting the AG radar in track mode isnt really needed for mapping. But it is needed for GMT and SEA
  18. Change the speedgate to WIDE
  19. This is just not the case and is counter to how proportional navigation works. The lead points can possibly shift a wide amount yes, but the longer the range the lower the line of sight rates become, and by extension the commanded accelerations are proportionately lower, it's just basic geometry. You can watch it yourself with an aim-7. It will not be doing maximum performance turns at 25 miles. You're comically overstating how hard these missiles are turning in F-Poles, this is especially true for later generation high G capable ones. It's not going to be hitting anywhere near its maximum G capabilities until very late endgame and the aircraft is doing the right maneuvering. Even then it's rare that you see amraam's hitting 40G.
  20. Yes it's a little bit of a contradictory statement. The range that the missile can chase down a cold target is the minimum abort, not the no escape. The no escape zone is really where the missile has enough airspeed (and lift to create the required G) to match most or all evasion maneuvers except for going fully cold and accelerating in the opposite direction. But where that line is isnt always the same. By using the crank and F-Pole you can shrink that NEZ because it's forcing the missile to do drag inducing mid G turns to match them. This doesn't actually defeat the missile at all and isnt suppose to in an A2A context, but what it does is buy yourself time to close the distance and make *your* own missiles deadlier. While reducing the amount of time you have to stay cold to fully trash that missile.
  21. No, There are no general purpose configured penetrator warheads
  22. It's not neccesarily unconventional it's just up to the design philosophy. There are many X config missiles that use bank-to-turn, particularly the ramjet powered types for intake air-flow reasons. Some designs also leverage BTT to maximize control authority in a single axis.
  23. The helmet wasn't aligned during your coldstart. They added that function some years ago.
  24. You're gonna have to make tracks and demonstrate it not working for you. I use baro alt to hold orbits over 5 degree bank angles all the time with absolutely no issues
  25. The encyclopedia is not accurate and doesn't reflect what is in the actual LUA files.
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