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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
CHIC 229L Delta Temperature at 10cm under Bare Soils 2022-08-08 18:47:12 Starting and final temperature frequently report -7999 or otherwise errant value. Both soil moisture and temperature affected. Replace sensor.
MRSH 229L Delta Temperature at 10cm under Bare Soils 2022-08-08 17:49:10 Starting and final temperature the same, indicating a failed heater. Soil temp is unaffected. Replace sensor.
ERIC 229L Delta Temperature at 10cm under Sod 2022-07-31 19:19:37 10cm sod sensor reports -7999 for starting, final, and average soil temperature.
RING 229L Delta Temperature at 10cm under Bare Soils 2022-07-30 18:57:38 10cm bare soil sensor reports -7999 for starting, final, and average soil temperature.
FREE Rain since midnight UTC at 0.6m 2022-07-29 17:01:08 Primary gauge reports significantly less than secondary and sometimes misses light events entirely. Please check gauge for clog or other issue. If no discernable problem, replace gauge.
SALL Rain since midnight UTC at 0.6m 2022-07-29 13:30:30 Primary gauge misses rain tips at start of precipitation. Please replace RG cable.
HOLL 229L Delta Temperature at 5 cm 2022-07-26 21:06:26 Starting and final temperature report -7999. Both soil moisture and temperature affected. Please replace sensor.
CHER 229L Delta Temperature at 10cm under Sod 2022-06-29 21:06:26 Showing symptoms of a failing heater. Gap between starting and final temperature very erratic, resulting in errant soil moisture values. Sensor was replaced last July for an apparently different issue. Soil temperature fine. Please replace unless other problem found.
EVAX Air Temperature at 9 m 2022-06-09 14:18:26 9m air temperature sometimes has low bias for extended period following high humidity/precipitation.
HOOK Rain since midnight UTC at 0.6m 2022-04-28 17:15:38 Primary rain gauge returned two consecutive post-cleaning -3 drip test results. Please replace primary gauge.