About
This is a hobby site. I am not a meteorologist; I like measuring things and finding out why the numbers are wrong.
The station
| Part | What it is |
|---|---|
| Temperature, humidity | SHT31 in a ventilated shield, 2 m above the roof ridge |
| Pressure | BMP280 indoors, corrected to sea level |
| Wind | Cup anemometer with a reed switch, 10-second pulse counts |
| Logger | A single-board computer, one reading every five minutes |
Accuracy
Treat everything here as indicative. The roof warms the air on still sunny days, the anemometer sits lower than it should, and the pressure sensor has never been compared with a reference instrument. The notes describe the problems I know about.
This site
Plain HTML written by hand, no scripts, no cookies, no analytics.