I'm trying to build an air pollution model. So far I have built one for point sources. Now I'm looking at monitoring air pollution with satellite images, based on the idea that every basic pollutant somehow reacts with EM.
What is a sufficient number of sampling points?
Yes, I know, it depends on the size of area. But right now I have only 10 sampling points (monitoring stations) for a Landsat image (a really big area). The Landsat image covers part of central Slovakia, ca. 23,000 km2.
I'm afraid I can't complete my master's thesis without adding my own measurements, but that's difficult to implement. Maybe a possible way is to add data from measuring stations that are located in neighboring countries. But that would still only make 28 sampling points..