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
ELKC Wind Speed at 10 m 2023-01-31 22:14:23 Suspect 10m anemometer may be presenting a high bias. Check if WSPD nut is loose. If not, investigate other potential problem with sensor. If loose and WSPD nut is plastic, replace with a rubber one. If already rubber, ensure nut is tightly fastened.
TALI 229L Delta Temperature at 10cm under Bare Soils 2022-12-16 14:22:32 10cm bare soil moisture sometimes does not properly heat, causing soil moisture to exceed allowed wet range. Prior tech visit revealed that moving soil moisture to different CE port did not change output. Tech noted bad conduit for sensor. Please replace both sensor and conduit.
TALI Soil Temperature at 30 cm under Native Vegetation 2022-12-16 14:17:12 30cm old-style soil thermistor has 3C low bias compared to 25cm. Please replace TS30.
WEB3 229L Delta Temperature at 10cm under Bare Soils 2022-09-21 16:52:06 Recent site photos show extremely tall vegetation on the east side of the site area around the bare plot and aux box solar panel. Fully remove vegetation from the bare plot, as well as all tall vegetation within the site fence.