Hi, I’ve noticed that all the reference monitors in Bangkok no longer show up on the map. They were there a couple of months ago. Have you stopped integrating with the PCD?
We pull the data for this from OpenAQ and OpenAQ pulls from PCD.
So if these monitors disappear it means that OpenAQ did not get current data.
Thank you. They have reappeared in the last few days. I note they show much higher readings. Do you apply the correction factor to the reference sensors too, or only to AirGradient sensors?
I guess the other explanation is that the PCD sensors I’m looking at are roadside ones. The one in Lumpini Park seems to have readings closer to the other AirGradient sensors.
However would be good to know if the correction factor also applies to reference sensors, I’m guessing not.
Thailand PCB uses a 24h moving average that smooths out the peaks. This is why the data often appears different from other sensors in the same neighborhood.