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Posted

There are some odd things about Single Target Track (STT):

- HAFUs are never colored.

- Donor information is never shown (I think this has to do with the bug where a separate HAFU sort of exists in its own bubble when TUC'd or designated as L&S/DT2).

- The trackfile in STT is dropped when you exit STT. This seems very odd to me. I understand it drops all other tracks, but why does it lose the track you have in STT? What I mean by this is that the trackfile/target in STT disappears when you exit STT, and the radar has to sweep over it again to find it. Seems like it should be kept (and of course if it can't find it, eventually drop it in line with the aging setting).

 

I'm quite confident the above things are bugs. Another thing I'm unsure of, but worthy of note, is that offboard trackfiles don't get shown in STT. I can see how the radar blanks all other onboard tracks when entering STT, but I'm curious if it's supposed to show offboard trackfiles still - which would make sense for better situational awareness.

Posted

- The trackfile in STT is dropped when you exit STT. This seems very odd to me. I understand it drops all other tracks, but why does it lose the track you have in STT? What I mean by this is that the trackfile/target in STT disappears when you exit STT, and the radar has to sweep over it again to find it. Seems like it should be kept (and of course if it can't find it, eventually drop it in line with the aging setting).

 

As far I know, STT doesn't generate track, because there is no need.

The track file is a computer history where it knows the previous positions, heading and velocity of a target. It doesn't never know where the target is, only the history. Why it is called track as you are tracking something, not following something.

 

In time when you generate enough information, that radar does by sweeping the space and seeing that specific object has an pattern in its motion, it will allow computer to start building a track and prediction based to that where is the object going to be in the future when next sweep is passing it.

 

Everytime the prediction is accurate, the prediction becomes more accurate, that is one of the "targeting gates". And that increase in accuracy requires multiple sweeps and steady object motion and heading.

 

If the object maneuvers, change is speed etc, you can't generate accurate prediction where the object will be. Meaning you can't shoot at it as your weapon is going to position where object will not be.

 

The one of the target gates is that is prediction where target will be, one is what is the possibility of the target (based last known values) to be at any given time. So if prediction goes wrong, search is performed in the area where it might be. And that makes complex tracking as when multiple objects starts to fill same space as your predictions and possibilities are in conflict.

 

The STT doesn't require tracking, as radar is constantly following the object. Its location is known all the time every microsecond (instead from few seconds to multiple seconds) the object position, velocity and heading is measured.

And you don't care where it was, where it might be, as you know all the time what the object is doing.

 

So when the radar exists from STT, it has lost the lock. It doesn't know where object is. It didn't track it, it only followed it because prediction was not required or wanted.

There is that function that radar would scan the last known space to find it again.

 

The missile itself can have, and needs to have a computer to build a prediction so it can intercept the target. Otherwise it would be pure pursuit where missile is flying straight at the target and constantly changing direction as it follows target and so on lose speed. Why IR missiles without datalink can't perform complex interception.

 

As the STT already targeting grade quality, compared to TWS that is not accurate or valid for targeting, you can guide anything at that target and question is only about weapon capability follow the target and hit it.

You give the best possible change for the missile (or bullet) to hit the target if it is fast and agile enough.

 

So when you drop from STT, computer clears the memory and starts sweeping space with radar and build a track files once the sweep pattern is completed. It can't use any previous data as it can be invalid.

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Posted (edited)

STT does generate a trackfile; it wouldn't show a HAFU or appear on the SA format otherwise.

 

A trackfile does not need to be something predicted. All it is is an object in the air the computer sees as a single object based off the own radar and/or datalink donors (even if the radar gives multiple raw returns, they can be determined to be trackfile/HAFU) which is assigned a known speed, heading, altitude, position, identification, etc.

 

The radar drops the lock, yes, but why does it forget about the trackfile? Exiting STT is no different than the radar sweeping over the trackfile. It saves its last known parameters from the sweep, or in this case from the last moments of being in STT.

 

"It can't use any previous data as it can be invalid" - this is no different than the radar sweeping over the contact in search mode. The moment after it sweeps, said info may be invalid.

Edited by Jak525
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