The second generation Kunlun Automated Weather Station
The second generation Kunlun Automated Weather Station (KLAWS-2G, see image) for monitoring astronomical site at Dome A has a mast of 15m high. At different heights, there are 10 temperature sensors (-1m, 0m, 1m, 2m, 4m, 6m, 8m, 10m, 12m and 14m), 7 wind speed and direction measurements (2m, 4m, 6m, 8m, 10m, 12m, and 14m), one pressure measurement (2m), and one relative humidity measurement (2m). Temperature is measured with Young 4-wire RTD (Model 41342). Wind speed and direction are measured with propeller anemometers (Young Wind Monitor-AQ model 05305V). Air pressure is measured with barometric pressure sensor (Young Model 61302V). Relative humidity is measured with a relative-humidity/temperature probe (Young Model 41382VC). The customized electronic box of KLAWS-2G sits at the foot of the mast with an active thermal control system to keep it at working temperature. The KLAWS-2G is connected to PLATO-A for power and real-time data transfer via Iridium satellites.
According to the manuals from Young company, uncertainty on all temperature measurements is 0.32 Degrees Celsius (but should be more accurate, see Hu et al. 2014, PASP, 126, 686), wind speed error is 0.2m/s, direction error is 0.5 degree (plus installation offset), and pressure error is 15hPa.
Latest Weather at Kunlun Station
|Wind Direction |