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Monthly QA Report

Quality Assurance

The Oklahoma Mesonet’s quality-assurance (QA) consists of four principal components:
1) laboratory calibration,
2) on-site intercomparison,
3) automated QA, and
4) manual QA.

In the instrument laboratory, all sensors are calibrated to validate or improve upon factory calibrations.

On an annual basis, the accuracy of several types of sensors in the field is verified through comparison to calibrated reference sensors housed in a portable system.

To make a first pass through the 640,000+ observations that are received at the Mesonet each day, automated QA software includes numerous algorithms to evaluate the data received from remote stations.

Finally, the Mesonet’s QA meteorologists employ numerous manual techniques to complement automated QA including analysis of monthly statistics to detect sensor drift or bias (click on a month and year to the left to download a PDF version of a Monthly Report). In addition to detecting problematic sensors, the QA meteorologists trace the true start time of each problem so that appropriate data can be manually flagged as erroneous. The QA meteorologists are responsible for communicating problems to, and coordinating with, appropriate field technicians to ensure proper resolution (see a list of the current outstanding tickets below).

Current Trouble Tickets in the Oklahoma Mesonet
(For questions regarding these tickets, contact )

Station Variable Date Reported Problem Description
BUFF Wind Speed at 2 m 2020-05-28 22:52:46 Technician reports sensor cup assembly is damaged. Please replace sensor.
BROK 229L Delta Temperature at 5 cm 2020-05-27 16:53:52 5-cm sensor does not heat properly. Suspect sensor damaged by lightning strike.
RING Station Battery Voltage 2020-05-26 14:41:50 Battery voltage drops low after cloudy conditions. Currently below 11V.
BUTL 229L Delta Temperature at 10cm under Bare Soils 2020-05-21 20:57:38 Final temperature reports -7999. Heater may be source of problem. Check all wiring before replacing to see if issue stems from there.
HINT 229L Delta Temperature at 5 cm 2020-05-18 20:48:30 Soil moisture at 5 cm reports errant values during rainfall. Suspect exposed bare wire. Replace Sensor.
OKMU Solar Radiation 2020-05-18 20:37:08 Solar radiation sometimes spikes down between 0 and expected value during clear conditions. Please replace sensor.
WATO Soil Temperature at 5 cm under Native Vegetation 2020-05-11 19:51:44 Sod temperature at 5 cm has very large diurnal variation. Suspect sensor is too shallow. Rebury sensor.
HECT Air Temperature at 9 m 2020-04-13 20:00:59 9m air temperature sometimes reports values much less than expected for a couple hours, then returns to normal.