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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
FREE 229L Delta Temperature at 5 cm 2021-11-11 22:42:59 5cm sod sensor stopped heating. Starting and final temperatures are the same.
BUFF Rain since midnight UTC at 0.6m 2021-11-11 22:42:22 Primary gauge drip tested 3 tips low for two consecutive post-cleaning tests. Please replace gauge.
REDR Solar Radiation 2021-11-01 21:46:05 Following tower leveling during most recent pass, sensor now unlevel to the west, diurnal curve slightly wider on the right side when plotted. Please ensure sensor is level, independent of the tower.
OILT Soil Temperature at 30 cm under Native Vegetation 2021-11-01 21:37:13 During heavy rain events, temperature values unexpectedly step down and diurnal variation dramatically diminishes the following days, more so then expected, before unexpectedly stepping up and behaving reasonably.
WATO Rain since midnight UTC at 0.6m 2021-10-25 20:41:39 Primary gauge misses events entirely while secondary gauge reports reasonable values. Cables already replaced just over a month ago.
NRMN Air Temperature at 9 m 2021-10-12 20:26:21 Please inspect radiation shield for potential hail damage. If damaged, replace radiation shield. No problems currently seen in data.
NRMN Wind Direction at 10 m 2021-10-12 20:23:56 Please inspect windmonitor body for potential hail damage. If damaged, please replace. Currently no problems seen in data.
NRMN Wind Speed at 2 m 2021-10-12 20:17:28 Tech visit confirms damage to WS2M sensor. Anemometer cup likely cracked by hailstone. Please replace sensor.
NRMN Relative Humidity at 1.5 m 2021-10-12 20:15:02 Tech visit this morning confirms damage to sensor housing. Hailstone induced puncture in top most disc of radiation shield. Please replace radiation shield.
NRMN Air Temperature at 1.5 m 2021-10-12 19:13:46 Tech visit confirms damage to aspirated shelter. Photos reveal hailstone induced puncture in plastic on top of sensor enclosure. Please replace.
BREC 229L Delta Temperature at 10cm under Sod 2021-09-08 13:40:42 After prolonged period of noisy data, 10cm sod final temperature now same as starting temp or reports random bad value.
LAHO Soil Temperature at 30 cm under Native Vegetation 2021-08-17 17:33:39 Continuity 30cm sensor unexpectedly steps down sporadically multiple times before now consistently reporting much lower and more erratically than other depths. Please replace.
LAHO Soil Temperature at 5 cm under Bare Soil 2021-06-18 16:56:10 5 cm continuity bare sensor very sensitive to solar radiation. Suspect sensor too shallow, please rebury. Replace depth rail if damaged.