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The radar does not directly measure the carriers Doppler shift. Almost all radars will down-convert the received signals to baseband or IF. Also, consider that each range bin will only have ~2 samples per pulse (sample interval is about half the pulse duration, and the range bin is equal to 1 pulse duration). You won’t get much from a 2 point DFT (don’t think FFTs go below 8 point).. Especially given the poor SNR from a single pulse. Thus, relative phase shift over a period of many pulses is needed to determine Doppler shift. An FFT will be performed once enough pulses have been integrated.

You are correct. Another point is that the ADC in most radars wont sample the signal anywhere close to the carrier frequency. It usually only needs to sample 2 or 3 times in a given duration equal to the pulse duration (effective Pulse Duration). This means that the radar has to measure doppler after a series of pulses have been accumulated. It looks at the relative phase shift over these pulse returns. Also, in defense of the OP, most radars can turn off their main lobe notch filter in look up conditions. Even the DCS AWG-9 does this.

Curious as to what happened to MSI...? Two weeks ago it was working with wags in his internal build, then it released into OB with its main function broken. (no datalink on radar, only fused tracks)

You're wrong on all accounts. The F/A-18C can do very fine doppler processing. Including in GMTI, GMTT, SEA, DBS, SAR, PVU, etc.. Legacy MTI like you referenced in none doppler radars used the beat frequency of a targets consistent phase shift to distinguish moving from none moving targets. Older Pulse only radars like the MIG-23's Highlark use this technique. However, at no time can old school "MTI" resolve the actual doppler shift (velocity) of any target. All it knows is that something is moving relative to its transmitted signal. Most air to air modes, DBS, SAR, Scan RAID, etc need to resolve the exact doppler of a target. So yes, the Hornet does doppler processing (real Doppler, not old school MTI) in almost all modes. RBGM being one that it probably doesn't. Thats a nice telephone game there. But to that point, just because something isnt often used doesn't mean it doesn't work.

The F/A-18C does indeed have GMTI and GMTT modes, so yes it can spot and track moving ground targets. (even stationary targets if they have a spinning antenna). But being that it is an indicator, the moving targets are displayed as bricks, and are not imaged like you would see with SAR or ISAR. I do not think its possible for the F/A-18C to use Ground Mapping and GMTI at the same time. Its one or the other. As for the term "Pulse Doppler".. That's more of a layman term describing High/Medium PRF capable radar. That being said, Doppler is in fact processed in most ground mapping modes like DBS, SAR, GMTI, GMTT. With the exception being Real Beam Ground Mapping (RBGM).

Not completely sure what the geometry of the situation was, but yes it may very well be intended. The RWR has no idea about who’s ‘supposed’ to be locked/targeted. All it knows is that an RF signal is detected with parameters that match a threat signal in its library. If your RWR is within the beam of the radar, or (depending on range) in a side-lobe, or really any possible position that would allow the light (rf energy is light) to be detected by the RWR receiver, then u will get an RWR indication/spike. It should also be noted that engineers go to great lengths to make RWRs very sensitive as to inform and protect the pilot. Also, unlike a radar receiver, an RWR receiver only has to deal with one way path loss, making all the better at detecting signals at range. Again idk if u experienced something different or if there is an actual bug. Just thought it was worth mentioning

My problem fixed itself after a DCS repair

what button are you using to de-select L&S?

I cant even get the bottom HAFUs to show up at all. For me, if a target is on the datalink, it wont show up on the RDR ATTK page. Even the targets radar bricks disappear. I only know this because when I turn the PPLI, F/F, SURVL tracks off, the radar bricks show up again.

wags, is the team still at work on Vulkan or is it on hold?

I think he’s trying to say the middle one isn’t working. (ie no datalink, unless also detected by ownship)

IRL, if two (or more) air targets are within same range bin and general speed (relative), the radar will detect the two targets as one. this has two primary effects. 1. The pilot wont know how many targets are actually there, unless they use a RAID mode (Very fine Doppler processing that narrows the antenna beamwidth on receive) 2. The two targets being in the same same range and Doppler bin sum their RCS, and are thus detected at much greater ranges than they would have been if they were alone. Currently in the DCS F/A-18C, the radar bricks do not merge as they would IRL. Adding this logic in would bring relevance to the RAID modes that will later be implemented. Otherwise the RAID modes would just be a 'zoom in' feature, which will already exists with the TWS "EXP" (expand) button.

Im looking at purchasing some usb foot pedals, each with their own usb input. I already have a bunch of usb controllers connected. Is there a limit in DCS?

Sorry, Track uploaded this time Ageout.trk

LTWS differs from TWS in that it provides much greater scan volume. It does this by simply allowing for much longer trackfile age-outs than TWS, hence its name Latent TWS. Because those tracks dont get updated very often, and are allowed to extrapolate target position from old returns, they are not super accurate and cant be used for weapons. With that being said there are two issues with LTWS in DCS right now. LTWS age-out times: Currently in DCS, LTWS tracks dim after 4 seconds and completely disappear after 8 seconds. This is not accurate as its not even long enough for a trackfile revisit in max scan volume (~13 seconds to complete a 6 bar 140 degree scan). the 4 second dim and 8 second age-outs sound more like regular TWS times. LTWS Trackfile extrapolation: As stated before, Latent TWS and TWS both work similiarly with the exception of age-out. Currently in DCS, LTWS does not extrapolate trackfile position. ie the radar knows the tracks vector velocity and position but does not internally predict the targets course with that info. instead LTWS tracks just sit still until the target is revisited by the radar. Just as with normal TWS, LTWS should perform target extrapolation between radar revisits. See attached track.

DCS 2.5.5.32299 Open Beta has improved LTWS TD box (though if one rapidly maneuvers up and down in pitch you can still see the TD box struggling to keep up). But the HARM TD box and RWR symbols are still suffering from the issue. See attached track HARMandRWR.trk

VKBDevCfg-C go to bottom profile tab, then buttons tab. (note: all the images below show what you want it to look like. ie, without POV mode switch) For both the physical and logical tabs, alter the button type to "button" in the pull down tab. Make sure to assign that new button to joystick button 28 or higher, otherwise it will default to joystick button 5 (duplicating the pinky switch press). Finally, make sure to hit the "SET" for the program to upload the new input layout. Then save the profile if you like.

thanks! got it working

VKB, I want to use the SCG mini-stick as an axis, and the depress as a button. However, pressing down on the mini-stick switches it to a 8-way POV. Is there a way to use the mini-stick depress as a button and not a mode switch between axis/POV?

Did they fix the movement of the RWR symbols while turning? One of the bugs is that the symbols dont move if you turn. they only relocate once the emitter is re-detected. https://forums.eagle.ru/showpost.php?p=3895048&postcount=11

A suspicion is not a conclusion.. And despite what has been said about only art work and the FM guys working on the F-16, its radar was on and scanning and the HSD was on with waypoints. And yes, some hornet systems are advanced and will take time. But the Hornet radar is still missing basic features in RWS, like color button, spotlight search, LTWS completion, and MSI. Meanwhile F-16 is supposed to launch with RWS and TWS out the door.

Does anyone know if the AN/ALR-56M Radar Warning Receiver provides synthetic audio, PRF audio, or a combination of the two? There is various footage of F-16s providing PRF audio, but the jet has had several RWRs over the years (ALR-69 and ALR-56 in the USAF). Some footage: (very obvious PRF tones)

The F-16 video shows the radar scanning in RWS mode and the HSD page with working waypoints entered.. Honestly, I suspect one of the reasons the Hornet progress has been so slow is because they are simultaneously implementing systems into the Viper.

1. Sicily + North Africa (Tunisia) 2. Crete + North Africa (East Lybia / West Egypt) Has to be one of those. Yes. Modern and WW2 bases in all these locations. Yes. Lots of desert and water Yes. Base separation via terrain and/or water. Yes. Balanced mix of water and land. Yes. North Africa. If it was in North Asia, he might have said it'd fit in Korean war, but he didn't. South Asia has too many trees which wont fit into low performance. Same goes for baltic sea.

In regards to the recent Hornet update, can ED expound on the work being done on the EW page?