Judged:

4

4

4

Only one spacecraft in orbit right now is monitoring greenhouse gases, Japan’s Gosat (Greenhouse Gases Observing Satellite), and its resolution isn’t good enough to give an accurate picture of a city’s emissions. But in the next few years,
"NASA plans to launch the Orbiting Carbon Observatory (OCO-2) satellite and install a new instrument (OCO-3) on the International Space Station".
Both devices will periodically take snapshots of the “chemical weather” over population centers.“OCO-3 will have a ‘city mode’ where it rapidly starts sweeping back and forth like a whisk broom,” says Duren. He
"expects"
the satellite to take some 3,000 samples over a city in just a few seconds.
There you go again they really really don't know and don't have.