[NOT BUGS] LTWS wrong trackfile age-out / missing target extrapolation

[Beamscanner]

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.

Edited June 15, 2019 by Beamscanner

[Beamscanner]

Sorry, Track uploaded this time

Ageout.trk

[Santi871]

 

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.

 

 

This one is controlled with the track timeout setting under DATA on a per weapon basis in DCS. Don't know if that's true to life, but you can increase it to get the desired result.

 

However since like as you said it's not extrapolated, it will be wildly innaccurate.

 

Strangely enough, track extrapolation works fine for offboard (ie link16 tracks), you can see them moving smoothly and it's easy to spot when they refreshed every few seconds. That has its own set of disadvantages though, as it can show they kept flying straight when in reality they changed aspect.

[Jak525]

As Santi said, it's based on the age setting--so I don't think the first point is a bug.

 

As for the track extrapolation, you may be right. Let's see what ED says.