TWP/SMET/C3 - ORG data noisy due to degraded ground
SMET Rain Data began to be noisy during December 2005 and the problem slowly became worse over time so that in February 2006 the ORG was reporting with a constant background value of around 0.10 mm/hr rain rate. ORG voltage showed a near constant value above the 85mV threshold. The ground for the ORG had become degraded and was lost due to corrosion.
Subtract 0.10 mm/hr from data when the constant value shows up. Any data not invloved in the constant value should be viewed critically before assuming rainfall occurred. Nearby BoM site with tipping bucket rain gauges may provide data to assist in determining if rainfall occurred