MorpheusXAUT/IASsure

Feature Request: Estimation of Bias

Opened this issue · 3 comments

deshbeta commented

With live weather data, GS, magnetic heading and currect track (via Mode S) it should be possible to calculate a crosswind related HDG deviation. Having that there should be a mathematical possibility to estimate the wind bias (live vs. sim) and so to calculate IAS also for non-live weather.

MorpheusXAUT commented

Hi @deshbeta,

thanks for the suggestion, sounds like that could be a great addition to make speeds even more comparable!
I'll have a look over the next days whether we have all the information we need and I can come up with a reliable implementation.

Will keep you updated!

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deshbeta commented

I fear you will need to make some assumptions. The calculated HDG deviation will give you the crosswind component. So you will get only one orthogonal component from the spot wind (see picture). However, head(/tail)wind (which is the other orthogonal component in the equation) will be dependent from angle AND magnitude. Having the crosswind is like still leaving one variable behind (I guess). But maybe I am missing something on myself. Also, I am not an expert on your plugin. So I wish you all the luck :)
image

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MorpheusXAUT commented

Awesome, thanks! I'll see what we can figure out.
Even if we cannot fully calculate all values and might have to make some assumptions - if they get us closer to the "true" values, that's a good start already 🙂