For most the last week I've been baffled by sensors on the CASLab mast cutting out for no reason. It's over a kilometre away, so a good walk or ski. But as soon as I get back, the problem seems to return! After numerous trips, I've isolated the fault to a power supply and have made a temporary replacement while I build a permanent fix. More trips next week then, but the weather should improve which means excellent skiing!
A kilometre walk with an offending mast at the end
We've also been ticking off the annual checks on other instruments. This afternoon Tams and I climbed the met mast to calibrate up the Present Weather Detector, a cunning device to measure snowfall rate. Mast work is interesting and good fun. There's a lot of co-ordination and even more planning involved in doing fiddly jobs when dangling from a harness in -15C.
Calibrating the PWD