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
BYAR Rain since midnight UTC at 0.6m 2020-11-24 15:58:56 Secondary gauge underreports tips during rain events. Replace cable on primary gauge for consistency.
HECT Air Temperature at 9 m 2020-11-23 21:49:13 Sensor reports errant values at or near -248C for several hours then returns to normal. Sensor was replaced following similar symptomology earlier this year. Please replace sensor cable.
HOLL 229L Delta Temperature at 5 cm 2020-11-17 15:43:36 Sensor slow to reach or doesn't reach saturation following heavy rain events. Original sensor. Please replace.
MANG Air Temperature at 1.5 m 2020-11-02 22:33:19 TAIR reports over 3 degrees warmer than TSLO during sunny conditions. Problem began during ice melt following October winter storm. Check aspirated enclosure for damage.
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.
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.