@idefix37 thank you! Your answers were helpful! I've googled more and found that this is not a trivial task to get ground concentrations from the satellite integral data. There are bunch of complex models and ways to do so. I wonder why the other pollutants are presented in micrograms per m3 and only the SO2 data is in 'unpractical' units. Wish you good luck!
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RE: Probably wrong units of SO2 concentration
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RE: Probably wrong units of SO2 concentration
@idefix37 thank you! Your answers were helpful! I've googled more and found that this is not a trivial task to get ground concentrations from the satellite integral data. There are bunch of complex models and ways to do so. I wonder why the other pollutants are presented in micrograms per m3 and only the SO2 data is in 'unpractical' units. Wish you good luck!

RE: Probably wrong units of SO2 concentration
@idefix37 oh, I'm sorry, my bad... Is it possible to convert this to micrograms per m^3 somehow? I tried to google this with no success. I tried to use the formula (Ideal gas law):
pV=(m/M) RT like this:
For example in Moscow was 10 milligrams per m2 today
Temperature = 23 °C = 296 K
V = 1 m3
So p = 10e6 * g = 10e6 * 9,81 = 9,81e5 Pa (partial pressure of SO2)
Molar mass M of SO2 is 64e3 kg per molem = pM/(RT) = 9,81e5 * 64e3 / (8,31 * 296) = 2,6 micrograms per m^3
But I'm not quite sure if this correct convertion. Russian state threshold limit value of SO2 is 50 micrograms per m3  it is about 195 milligrams per m2 (by the formula above) in Shanghai is now more than 230 mg/m2
Is this convertion correct? (seems legit, but...)Also I've found another 'bug' : when I flip my phone the value can change up to 10 times in the same area

Probably wrong units of SO2 concentration
Hi! Here's a screenshot from Android Russian version of Windy. I guess it should be micrograms not milligrams. Screenshot_20200823021949_Windy.jpg