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.|