30-05-2015, 01:26
the point about grass is that the alternatives like concrete are very heat reflective and will get lots of increased ambient temperature. The local football club won't take kindly to you setting up the unit in the middle of the field on the halfway line and marking a no-watering zone around it, will they 
But for complete accuracy (or more correctly, consistency), that's the kind of location that you need. Ultimately, compromises will always need to be made in a home setting. Aspirated sensor units can help (if you can aspirate from "non-tainted" sources) but the compromise is if you want weather condition information you'll need to find the least impactful location for your sensors or like me, put up with knowing you have them in a problem area, but knowing it's still correct "relative" to the reading you took 5 mins ago (but maybe not to the local airport with proper sensor placement)
But for complete accuracy (or more correctly, consistency), that's the kind of location that you need. Ultimately, compromises will always need to be made in a home setting. Aspirated sensor units can help (if you can aspirate from "non-tainted" sources) but the compromise is if you want weather condition information you'll need to find the least impactful location for your sensors or like me, put up with knowing you have them in a problem area, but knowing it's still correct "relative" to the reading you took 5 mins ago (but maybe not to the local airport with proper sensor placement)