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If you are positioning away from a building or tree (or other object) of height 'h' (or the mean height of several objects is 'h'), then the distance away depends on which standard you are trying to meet, and can vary between 1.5 and 3 times 'h'.
In the UK, the recommended height is 10 metres. Advice varies on whether you should correct for a lower height.
== Where should I position the rain sensor ==
See [[Rain measurement]]▼
▲See [[Rain measurement]]
Officially the rain gauge should at a distance away of 2 times the height of each nearby object (buildings, trees, walls, solid fences etc.).▼
▲Officially the rain gauge should at a distance away of 2 times the height of each nearby object (buildings, trees, walls, solid fences etc.) and just high enough off ground level to avoid possibility of splashing..
You can experiment, but for amateurs, no more than a metre off the ground (or roof if mounted above it)* and at least a metre from any wall or solid fence whose height exceeds that of the sensor seems good enough.▼
▲You can experiment, but for amateurs, no more than a metre off the ground (or roof if mounted above it)* and at least a metre from any wall or solid fence whose height exceeds that of the sensor seems good enough.
You can find lots of discussions online about wind effects, and rain shadows, together with research on positioning requirements in rural and urban locations. A good starting point is [http://www.rmets.org/weather-and-climate/observing/guidelines-observing-0 this UK website]▼
▲You can find lots of discussions online about wind effects, and rain shadows, together with research on positioning requirements in rural and urban locations.
Note * not possible for Davis stations if temperature measuring criteria met
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