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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
CHEY 229L Delta Temperature at 25 cm 2020-10-19 21:46:43 Soil moisture values errantly spike downward during high humidity. Soil temp fine. Original sensor. Please replace.
HINT 229L Delta Temperature at 60 cm 2020-10-19 21:39:28 Soil moisture values errantly spike downward during high humidity and rain. Soil temperature unaffected. Pass photos from 2019 reveal exposed sensor wiring exiting equipment enclosure and near base of tower. Please replace.
TAHL 229L Delta Temperature at 10cm under Sod 2020-10-19 20:55:13 Soil moisture values very erratic. Starting temperature reasonable, final temperature changing more rapidly than expected. Soil temperature fine.
ACME 229L Delta Temperature at 10cm under Sod 2020-10-06 14:01:02 Both soil temperature and soil moisture reporting -7999 or otherwise errant, erratic values.
FORA Rain since midnight UTC at 0.6m 2020-09-29 01:41:23 Primary gauge drip tests lower than desired. Please replace gauge.
EUFA 229L Delta Temperature at 10cm under Sod 2020-09-28 20:58:50 Sensor returns erratic, noisy moisture values. Soil temperature fine. Suspect failing heater. Replace.
EVAX 229L Delta Temperature at 60 cm 2020-09-21 21:27:53 Both soil temperature and soil moisture frequently report -7999. Please replace sensor.
NEWK 229L Delta Temperature at 60 cm 2020-06-22 21:17:46 60-cm sensor doesn't heat as expected, resulting in bad soil moisture data. Soil temperature is fine.