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
PORT 229L Delta Temperature at 25 cm 2021-05-03 16:50:26 Suspect failed heater. Difference between starting and final temperature is negligible. Soil temperature fine. Please check sensor wiring for potential problems before replacing.
NRMN Air Temperature at 9 m 2021-04-29 22:13:43 TA9M shelter damaged by hail.
ERIC 229L Delta Temperature at 10cm under Sod 2021-04-19 21:07:51 Both starting and final temperature report -7999 or otherwise errant values. Both soil moisture and temperature affected. Sensor just 1.5 years old, please check all wiring and ports for problems before replacing sensor.
SEIL 229L Delta Temperature at 5 cm 2021-04-12 21:23:34 Five and ten centimeter sod sensors do not compare as expected. Long standing issue - TS10 determined to likely be fine. Please replace 5cm sod sensor and confirm new sensor is at correct depth.
JAYX 229L Delta Temperature at 10cm under Bare Soils 2021-04-06 13:45:20 Sensor exhibits extreme diurnal variation compared to other depths and neighbors. Recent data suggest 10cm bare soil temperature now affected by tower shadow in the afternoon. Suspect sensor too shallow. Please rebury.