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by1014

incorrect surface wind directions?

By by1014, in The AS16 and ASCA | Active Sky | Active Sky Next | XPAX Support Forum

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by1014    0

by1014
Posted

Over the past week now, I am getting inaccurate surface wind directions, even with default settings in ASN. The wind speed is correct, however when checking the metar both within ASN and online from NOAA, the direction is always incorrect, for instance right now in KSNA the wind should read, 230 / 8 knots.. however in fsx I am getting 217 / 8 knots... this happens at all airports I select, the wind direction ranges from 10-30 degrees incorrectly, any thoughts on what is going on?

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JRBarrett    3,070

JRBarrett
Posted

The winds in a METAR report are referenced to true north. The winds in FSX are referenced to local magnetic north. The magnetic variation at Santa Ana is 12.2 degrees easterly, so 230 deg true (ASN) = between 217-218 degrees magnetic (FSX) at this location.

 

In other words, what you are seeing is not an error.

Jim Barrett

Licensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.

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