Rain data is captured by a tipping bucket with 0.2mm resolution.
During a 3 minute interval we count the total number of tips and
transmit that data to server. Since we have data for every 3-minute
interval it should be easy to see the intensity of rain and patterns
Limitations: if the rain count is not transferred during an interval then it will
be transmitted as part of next interval. Rain less than resolution will (0.2mm)
will not be measured.
wind speed is in miles per hour. we sample wind speed every 15 second.
The instrument returns the number of revolutions counted in that 15 second interval.
revolutions / 15 second is the speed during that sample interval.
if the wind speed is > 0 then it is added to a cumulative average during 3 minute period.
Every 3rd minute the wind speed CMA is transmitted to the server.
Soil dielectric permittivity is sampled every 3 minutes. From dielectric permittivity,
we can calculate soil volumetric water content using e.g. Topp's equation. we provide a
large number of samples (> 180) per day.
Soil temperature is sampled every 3 minutes. The depth of probe depends on a particular
Pressure graphs shows variation over the minimum recorded during the interval.
Temperature, Relative humidity and Pressure are sampled every 15 second. We calculate
cumulative moving average (CMA) for 12 samples to reduce jitters. This CMA at the end
of 12 samples (roughly 3 minutes) is transmitted to the server.