We are a group of researchers looking at using purple air and also additional PMS5003 sensors for looking at the relationship of PM and health outcomes
we have done a small pilot of looking at PM2.5 PMS5003 correlations with TEOM data at a co located site but the base correlations are very poor (The TEOM data mean was around 20 micro grams for PM2.5 for the time period). We are wondering if there is open purple air data looking at correlations between EPA/TEOM stations at various locations?
In addition, does purple air use the RAW PMS data or do they apply any conversion/calibration method? and if so is that documented anywhere?