MN - INS altitude problem

[Ignition]

There's a problem with the altitude when using MN or INS. The waypoints are always looking below the terrain, I did some tests in the Caucasus map and it ranged between 250ft and 640ft

When changing to EGI it gets fixed.

I did PVU updates to both MN or INS in each test before updating, did a radar update (PB 17 on radar was correct and altitude was also correct in waypoint), the waypoint gets updated but it's looking below the terrain.

In the last test the waypoint was at 16ft. Looking with the TGP to the correct place of the waypoint, it said 644ft (which was way above the real 16ft). Changing manually the waypoint to 644ft did point to the right direction.

Switching to EGI, now the waypoint was way above the ground, changing manually to 16ft did point to the right direction.

[Rainmaker]

The TGP knows true elevation, so something is not quite matching up with what you are saying in your post. 

The radar only knows what is loaded in as a ref altitude for the steerpoint

In short…really need a track. 

Edited January 8, 2024 by Rainmaker

[Galinette]

Switching between INS and EGI don't change anything to altitude. Doing INS fixes don't change either the waypoint or the known aircraft altitude. There is something misunderstood here I think, yes a track would be helpful

[Rainmaker]

1 hour ago, Kercheiz said:

Switching between INS and EGI don't change anything to altitude. Doing INS fixes don't change either the waypoint or the known aircraft altitude. There is something misunderstood here I think, yes a track would be helpful

It continued in Discord. I think he’s sorted. There was a little more pieces to the puzzle that I think caused some secondary effects. 

[Ignition]

Yes, sorry. I will do more tests to see what was the problem. It may be related to a .miz thing. The aircraft wasn't in the correct position when aligned with SH. The next time I did a full INS alignment (changing the alignment with the correct coordinates) and the precision was way better, it still had 80-100ft error but it was almost on point.

 

TGP after ins fix

TGP where it should be

Edited January 8, 2024 by Ignition

[Ignition]

I did another test, this time with a .miz I've made. Full alignment with the correct coordinates.

The helicopter was the waypoint.

With EGI

With INS

This time the altitude didn't change, just the LAT/LONG

It has an error but is precise. Should it be on top of the helicopter or this error is common? The screenshots were taken in less than a minute after the update was done.