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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
OKCE Rain since midnight UTC at 0.6m 2014-10-23 18:24:09 The rain gauge reported zero during the rain event on October 23rd.
ALV2 Wind Speed at 2 m 2014-10-23 15:14:54 2m wind speed frequently reports 0 when 10m wind speed is less than approximately 3.5m/s.
APAC Soil Temperature at 10 cm under Bare Soil 2014-10-21 22:13:23 Soil temperature at 10cm under bare soil suddenly decreased and now has similar diurnal variation as soil temperature at 25cm under native sod. Soil moisture no longer shows diurnal variation.