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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
PORT Station Battery Voltage 2017-02-15 15:46:16 Logger reported low voltage error, then later stopped taking 5- and 30-minute observations. New program sent to station. Suspect same problem affected 1 TAIR and RELH observation yesterday. 5-minute averaged battery voltage is fine.
ERIC 229L Delta Temperature at 10cm under Bare Soils 2017-02-07 21:31:13 Soil moisture and soil temperature at 10cm under bare is reporting -7999.
CLAY 229L Delta Temperature at 10cm under Sod 2017-02-01 22:11:23 10cm sod sensor wired into 25cm ports. Rewire sensor.
FAIR Wind Speed at 2 m 2017-02-01 16:23:54 2m wind reports 0 when 10m wind is 4m/s.
BEAV 229L Delta Temperature at 60 cm 2017-01-13 15:10:24 Soil moisture and temperature at 60cm is reporting -7999.
NINN 229L Delta Temperature at 5 cm 2016-11-28 15:42:22 Final temperature for 5cm under sod increased from 15C to 28C. Starting temperature is reporting around 13C.