Antenna Elev Bug in PID and Azimuth bug

[IvanK]

This from Version 1.5.3.53108 Beta

 

With contacts displayed in both PPI and B scope close to head on. Apply roll inputs you will notice large azimuth changes to the displayed contacts even with very little actual heading change. Contacts are moving in azimuth in direct response to roll input. They shouldn't as radar antenna is both pitch and roll stabilized.

 

TWS (PID)

If you designate a target in TWS (PID) weird movements in the antenna elevation caret are observed with roll changes. If the target is displaced off the nose rolling in the direction of the target will see the antenna elevation caret rapidly going up the scale ....implying an increase in antenna elevation. Rolling away from the target sees the antenna elevation caret rapidly dropping down the scale implying a decrease in antenna elevation.

 

Its as if in PID the antenna or TWS tracking cell is no longer pitch and roll stabilized. It looks as if certainly in the case of antenna elevation its absolute and referenced directly to the fighters fore aft axis.

 

STT (PIC)

If transitioning from PID to PIC the problem goes away and the STT contact and antenna elevation caret behavior is logical/normal.

 

TRK below illustrates this behavior.

Contactbug.trk

[IvanK]

Some more info. The lateral translation of the contacts with roll in RWS and PID varies as pitch attitude increases. See in the trk below. as Pitch attitude increases or decreases the contacts move rapidly across the screen with roll inputs. They even swap sides. The greater the pitch attitude the greater the horizontal translation of the displayed contacts. As someone elsewhere alluded to this is a pendulous type motion. Its as if the radar centre point being used to calculate and display the contact position is offset from the radar boresight.

 

As can be seen with roll inputs resulting in perhaps 10 degrees of heading change result in contact azimuth shift way in excess of that especially with high pitch attitudes.

Contactbug2.trk

[Badlego]

AFAIK this behaviour is present since the patch that fixrd the CTD caused by Jammers. Before that, the contacts were Monitored correct, and it would be nice if this could be fixed again.

 

As soon as I perform a Roll, i cannot know the correct azimuth of my target anymore and if I want to Lock it with the Cursor i have to keep the plane still, or the contact will escape the Cursor....i hope you know what I mean....it feels like a big disadvantage and I believe that the real radar Interface doesn'twork like the actually simulated one...

[Azrayen]

Guys,

 

PID broke lock (antenna down)

and

PIC roll visible on VTB

are known issues that have already been discussed in the main radar topic (and a few other).

 

I suggest we wait for Razbam team to tell us it's fixed. I can't think of anything else to do.

 

++

Az'