VMC returned True for BKN or OVC less than 015

[merius92]

Hi Mathieu,

First of all, I want to tell you that I really like this library.
While I have almost zero experience as coder, I also work as a TWR Air Traffic Controller, and I tried to check how does the VMC attribute behave.

I noticed that when the visibility is less than 5000 the code works just fine, but for the BKN/OVC values between 015 and 010, the code still returns the True value, while according to SERA it shouldn't. For values of 009 and less it works as intended. I live and work in Romania so it wasn't hard to check the French translated SERA that you referred to :).

As a reference, this is the code I played with:

from PythonMETAR import * example = Metar('LFQN','METAR LFQN 201630Z 18005KT 8000 -SHRA BKN011 18/12 Q1014') print(example) properties = example.getAttribute('vmc') if (properties["controlled"]) == True: print('VMC') else: print('IMC')

Keep up the good work!
Cheers,
M

[patpragman]

This might be a factor of FAA definitions?

I'm not sure I understand exactly what you're asking for here, but here in the states, ceilings have to be below 1000' or visibilities below 3sm for it to count as IFR.