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P3D simconnect data incorrect

H

henrylzy

Messages
4
I created a program to broadcast data to mobile EFB from P3D's simconnect but the GS and VS readings of multiplayer(VATSIM) traffics are often incorrect. For aircrafts parking on the ground, they often have a GS of 6 knots(and they aren't moving at all), and for airborne traffics, their vertical speed is not correct either. Descending aircrafts will often has a positive VS instead of a negative one as they should. It doesn't happen to every aircrafts so I'm wondering if it's simconnect's issue or something else.

GS and VS data was from 'GROUND VELOCITY' and 'VELOCITY WORLD Y', respectively. I've also tried 'VERTICAL SPEED' but it would still give me the wrong data.

I think I can rule out network lagging because the planes showing up on my sim are not lagging at all.

I've tried to crosscheck the data from simconnect with VATSIM's vpilot client. Aircraft's VS from vpilot shows correct data but readings from simconnect does not.

I haven't modify the numbers I get from simconnect and broadcast those numbers directly to the EFB.
 
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