Source #
[XCVario] [External]
For wind calculation using “XCVario” source, the wind is calculated during circling. The procedure is straightforward, the calculation relies entirely on GPS data so a Flarm or other GPS source is necessary. During the calculation, the ground speed vectors are analyzed, and the wind vector is determined from the directions corresponding to maximum and minimum ground speeds.
Note: The instant wind calculation in straight flight based on magnetic heading will be added in one of the next releases of XCVario Pur.
The method is effective even if the circles are not perfectly circular, though maintaining a relatively constant speed while circling improves accuracy. By “External” setting can use a wind from a different gadget like Anemoi.
Measurement quality is further enhanced through intelligent filtering, which incorporates a quality factor based on the correlation between the directions of minimum and maximum ground speeds. Typically, two to three circles are sufficient for an accurate wind measurement, while an initial wind estimate is available after just one circle.
Reference #
[Heading-Up]
[North-Up]
You can select to display the wind arrow either with reference to your heading means relative to the body of your plane, or decide to north-up means the wind is displayed relative to the north direction with is on the top of the Symbol. The default is “Heading-Up”.
