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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
DURA Air Temperature at 1.5 m 2021-09-23 19:28:36 1.5m air temperature sometimes reports -7999 for extended periods of time in the afternoon. Only replace cable unless obvious damage discovered.
OKEM Solar Radiation 2021-09-09 17:30:17 Continuously reports significantly less than neighbors during daylight hours but still follows expected diurnal curve. Suspect dirty sensor. No significant rain chances in the next 10 days. Please clean and level sensor.
BREC 229L Delta Temperature at 10cm under Sod 2021-09-08 13:40:42 After prolonged period of noisy data, 10cm sod final temperature now same as starting temp or reports random bad value.
EUFA 229L Delta Temperature at 25 cm 2021-09-08 13:31:33 Soil moisture values errantly spike downward during high humidity. Please replace sensor.
ADAX 229L Delta Temperature at 10cm under Bare Soils 2021-08-25 14:00:51 10cm under bare soil starting, final, and average soil temperature report -7999.
HOBA Soil Temperature at 10 cm under Bare Soil 2021-08-19 19:06:42 Continuity 10cm bare sensor reporting -7999 or otherwise errant, negative values. Please replace sensor.
WASH 229L Delta Temperature at 60 cm 2021-08-19 18:46:44 Both soil temperature and moisture values reporting -7999. Please replace sensor.
LAHO Soil Temperature at 30 cm under Native Vegetation 2021-08-17 17:33:39 Continuity 30cm sensor unexpectedly steps down sporadically multiple times before now consistently reporting much lower and more erratically than other depths. Please replace.
HOLL 229L Delta Temperature at 10cm under Sod 2021-08-16 21:30:26 Sensor heating less than expected, causing bad soil moisture data. Problem does not trace to any current_ex replacement. Please replace sensor.
ARNE 229L Delta Temperature at 5 cm 2021-08-11 21:18:34 Difference between starting and final temperature is negligible, resulting in errant soil moisture values. Soil temp fine. Original sensor. Please replace.
BOIS Barometric Pressure at 0.75 m 2021-07-27 21:56:42 Values sometimes report much higher and more erratically than expected. Suspect problem lies with warped/shrunken barometer tubing. Please replace barometer tubing with prepared sections of tube in FieldReady box. Bring old tube back to lab for examination.
GOOD Barometric Pressure at 0.75 m 2021-07-27 17:44:32 Values sometimes report much higher and more erratically than expected. Suspect problem lies with warped/shrunken barometer tubing. Please replace barometer tubing with prepared sections of tube in FieldReady box. Bring old tube back to lab for examination.
LAHO Soil Temperature at 5 cm under Bare Soil 2021-06-18 16:56:10 5 cm continuity bare sensor very sensitive to solar radiation. Suspect sensor too shallow, please rebury. Replace depth rail if damaged.
HOBA Soil Temperature at 5 cm under Bare Soil 2021-06-18 16:48:05 5cm bare plot continuity sensor reports -7999. Please replace. Replace depth rail if damaged.