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Radar Filter


Joni
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From the manual:

 

RDI radar capabilities and limitations

 

Max Ranges* Lock Type Doppler

Search Lock TWS STT Filter

High PRF 65 50 yes yes 100%

Med PRF 45 20 yes no 50%

Low PRF 25 N/A no no 0%

 

* All distances are in nautical miles.

 

 

 

What does the doppler filer percentage is? The amount of filtering that will be under those modes? Doesnt seem correct.

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He's not suggesting that something is wrong he's asking what the doppler % stand for.

 

Exactly. Anyone?

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The higher the doppler filtering value, the better the radar is in detecting the high velocity targets and the worse it is with finding the slow moving ones. Also, with 0% filtering you will get a lot of ground clutter, which means that you won't find any targets moving against the ground.

 

Quickly checked the script from training missions on that, may be useful to repost them here:

 

In High PRF setting your radar will work as a normal Doppler Radar, which means using maximum range - around 65 nautical miles, it is good in detecting targets that are below you and it allows both Track While Scan and Single Target Track mode for weapons guidance. The cons are that it is very susceptible to notching and it will reject the low velocity targets.

 

Low PRF is quite the opposite - it is good for air-to-air look up and finding low velocity targets due to the fact that there is no Doppler filtering in this mode. However, it has poor air-to-air look down capability, it gets a lot of ground clutter, you cannot lock any targets and it has limited range - around 25 nM. It would be best employed to detect a target that is beaming you. One more thing - the contacts in this mode are displayed as squares on your radar screen.

 

Interleaved, or ENT, tries to get the best of both modes, having pretty good detection capability and ability to attain a lock in Track While Scan mode at 20 miles or less - but not to guide weapons. It still fares poorly against slow moving targets, though, and has limited range - up to 45 nM.

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Low prf does nothing in the Mirage, i checked many times wirh different confifuratuons and nothing, not even ground returns

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No ground return with the DCS A/A radar implementation, it will most likely be implemented with the A/G radar.

 

So the code now cannot give ground returns of AA radar??


Edited by JohnnyQ
missinterpreted

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Thats not what im asking, I know that. I asked if the AA radar can show ground or other returns that are not targets. Nothing to do with an actual AG radar.

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Thats not what im asking, I know that. I asked if the AA radar can show ground or other returns that are not targets. Nothing to do with an actual AG radar.

 

IRL the radar can show you ground return as radar contacts. In game this is waiting for the implementation of the A/G radar.

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Thats not what im asking, I know that. I asked if the AA radar can show ground or other returns that are not targets. Nothing to do with an actual AG radar.

 

Since what ED provided is an Doppler radar, no it won't show ground returns, you would likely need to code two radars, one that only activates in low PRF. Until the AG radar API works and is available to third partys, we won't get that.

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Since what ED provided is an Doppler radar, no it won't show ground returns, you would likely need to code two radars, one that only activates in low PRF. Until the AG radar API works and is available to third partys, we won't get that.

Sorry, but this is not true. Any user who is no 3rd party dev can already simulate A2A radar with what's available via export function in a great detail minus performance of the code since it's lua. So RB has all tools they need for a very believable representation and that includes all PRF, BW, noise, gains, filters, ... sim.

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Sorry, but this is not true. Any user who is no 3rd party dev can already simulate A2A radar with what's available via export function in a great detail minus performance of the code since it's lua. So RB has all tools they need for a very believable representation and that includes all PRF, BW, noise, gains, filters, ... sim.

 

I'm eagerly waiting to see the result of your own radar code.

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Low prf does nothing in the Mirage, i checked many times wirh different confifuratuons and nothing, not even ground returns

 

Whatever the PRF, FC3 F-15C and Su 27 or MiG 29 doesn't show any ground clutter.

 

It happens that I came across real life manuals of Su 27SK, early F-15C or even F-16A/C.

None of them talk about any ground clutter on radar display. Contact are are synthetic.

So the most likely is that what is considered as noise/ ground clutter is filtered out and not displayed at all.

Off course I don't have RDI radar manual, but it's the same generation of radar.

 

Low PRF is supposed to give better detection in tail or beam aspect contact.

But you can't lock low PRF contact in Mirage 200C RDI.

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Isn't F5s radar in dcs returning ground? :/

 

You can't compare F-5E radar and RDI radar. They are decades apart.

 

The F-14A has a kind of raw radar display on top of RIO panel and synthetic display on bottom (TID).

 

Mirage 2000C is a synthetic display, like F-15 or Su 27 and MiG 29.

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Shouldn't it show some false contacts from the ground clutter ?

 

I don't know, but this is something that the radar manufacturer is trying to avoid.

 

But we shouldn't compare Mirage III, Mirage F1, MiG 21, F-5 or the DDD panel of the F-14 with Mirage 2000C, F-15, Su 27 or MiG 29 radar display.

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Whatever the PRF, FC3 F-15C and Su 27 or MiG 29 doesn't show any ground clutter.

 

It happens that I came across real life manuals of Su 27SK, early F-15C or even F-16A/C.

None of them talk about any ground clutter on radar display. Contact are are synthetic.

So the most likely is that what is considered as noise/ ground clutter is filtered out and not displayed at all.

Off course I don't have RDI radar manual, but it's the same generation of radar.

 

Low PRF is supposed to give better detection in tail or beam aspect contact.

But you can't lock low PRF contact in Mirage 200C RDI.

 

Im saying that low prf has no effect on the mirage but it does in the f15. Its actually quite noticeable.

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Im saying that low prf has no effect on the mirage but it does in the f15. Its actually quite noticeable.

 

The F-15 only has medium and high PRF. You use high PRF for long range head on detection and medium when flying low under influence of clutter and against cold targets.

Low PRF doesn't have much use in a fighter.

 

And as jojo said, both the Mirage and the F-15 don't show clutter on the screen, even F-15As didn't. There is no use in that as the radars are dedicated to track aircraft.

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The F-15 only has medium and high PRF. You use high PRF for long range head on detection and medium when flying low under influence of clutter and against cold targets.

Low PRF doesn't have much use in a fighter.

 

And as jojo said, both the Mirage and the F-15 don't show clutter on the screen, even F-15As didn't. There is no use in that as the radars are dedicated to track aircraft.

 

Im saying that prf per se has no effect in the mirage, ill put a track tonight so you can see.

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Im saying that prf per se has no effect in the mirage, ill put a track tonight so you can see.

 

I haven't flown much Mirage lately but I'm pretty sure medium PRF gives you better tail-aspect detection performance at low altitude. If it doesn't then there's something wrong with the radar.

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There is. In the mirage it doesnt matter what prf you are in, the radar will see the space equally. In the f15 you must use it since it behaves so much different between prf. You lose and pick up targets accordingly. In the mirage you lose and pick up no mater the prf

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