Kala Patthar AWS provides data (with a 10 minute time resolution) of the following parameters:

- air temperature (°C)

- relative humidity (%)

- atmospheric pressure (hPa)

- global solar radiation (W/m2)

- UVA radiation (W/m2)

- wind speed (m/s)

- wind direction (degree)

- total precipitation (mm)

At the AWS Kala Patthar station the DQA030 rain gauge is manufactured by LSI-Lastem equipped with a siphon placed on the cone's nozzle; it has two

functions: during light rain the drizzle falls on the bascule without moving it and therefore evaporates without being measured; during heavy rain, it regulates the flow into the

bascule permitting all the water to fall inside. LSI-LASTEM rain gauges have stainless steel housing whereas the cone has been designed to avoid the drops splash

phenomena and to allow water droplets to dribble down inside even in case of very light rain. The rain gauge can be placed

either directly on the ground by means of the DYA042 base plate or mounted on the top or the side of 50 mm diameter.

For sites with sub-zero temperatures, the thermostatic heated models ensure the complete melting of snow, even at extreme temperature, whereas minimizing losse of evaporation; these models are insulated to reduce heat

dispersion.

Technical characteristic:

Collettor surface area: 324 cmq

Collector area diameter: 203 mm

Measurement range: Max 10 mm/min

Resolution: 0.2 mm/imp. (opt. 0.1, 0.5 mm/imp)

Accuracy: 0-1 mm/min: +- 1 basculata/tip 1-10 mm/min:1%

Contact: 1 reed (opt. N.2 REED) 0.5 a/24v non inductive

Pulse duration: 100 msec+-50

Collector cone material: Aluminium

External housing material: Aluminium

Tipping bucket material: Aluminium