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..

  • $\begingroup$ What is EM in your field ? $\endgroup$ – gansub Sep 10 '15 at 12:18
  • $\begingroup$ @gansub gases and particles may absorb and reflect at different wavelengths( same as ca. plants reflect in the infrared) I have correlation with measured pm and landsat TIR band..and Im looking for mor to build regression models and try to predict pm concetration. $\endgroup$ – ABCD Sep 10 '15 at 12:31
  • $\begingroup$ why not use an existing model - why build your own ? $\endgroup$ – gansub Sep 10 '15 at 12:37
  • $\begingroup$ @gansub I dont know If there really is some model. I have seen some papers where they build own models. I have NDVI, NDBI( building index), and humidity, temperature, elevation etc... also there is difference between measured temp. and temp. captured with satellite. So far yet with 20 sampling and 8 control points my predicted pm conc. differs from hundredths to tenths. $\endgroup$ – ABCD Sep 10 '15 at 12:46
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    $\begingroup$ @Fina if you could get PBL height from airplane data or from a good weather model... you could create a simple model that predicts PM for a specific location (e.g. based on prior measurements). If you are looking to correlate PM measurements with satellite data... you should be looking at an instrument that does aerosol measurements like MODIS or VIIRS. $\endgroup$ – f.thorpe Sep 12 '15 at 4:49

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