If instrumentation is moved or a site survey shows the reported information to be in error, what information should be provided to the supporting OWS and forwarded to AFWA?

• A. Instrument serial number and calibration date
• B. Latitude, longitude, and elevation information
• C. Sensor model and installation date
• D. Timezone and daylight saving status

Answer: (B)

Accurate geospatial metadata for instrumentation is essential. If equipment is moved or a site survey shows the reported information is in error, you must update the geographic coordinates—latitude, longitude, and elevation—so the instrument’s position is correctly recorded. This location data anchors the sensor’s measurements to the real-world point it represents, which is critical for data quality, proper QC checks, and integration into models and analyses used by the Operational Weather System and AFWA.

Keeping these coordinates current ensures that all downstream products, analyses, and calibration/validation activities reference the true location. Maintenance details like the instrument’s serial number or calibration date, while important for upkeep, don’t reflect where the instrument is. The sensor model and installation date describe hardware, not position. Timezone information isn’t the primary concern because data are typically standardized in a common time reference for weather data.