What type of maintenance might be performed on RAWS sensors?

The selection of physical cleaning and calibration as the correct type of maintenance for RAWS sensors is grounded in the need to ensure accurate and reliable data collection. RAWS sensors, which are critical for weather monitoring and fire danger assessment, require periodic maintenance that includes cleaning to remove any dust, debris, or other contaminants that may hinder their functionality. Calibration is equally essential to ensure that the sensors are providing precise measurements, as even minor inaccuracies can significantly impact decision-making processes.

Performing regular cleaning and calibration not only extends the lifespan of the sensors but also guarantees that they operate effectively under varying environmental conditions. This type of maintenance is vital in ensuring the integrity of the data gathered for operational purposes, especially in fields like fire management, where timely and accurate information can have serious implications.

Other options, such as software upgrades only, focusing solely on hardware replacements, or exclusively replacing outdated sensors, do not encompass the needed routine practices for maintaining sensor performance and accuracy. While they may be aspects of maintenance in certain scenarios, they do not reflect the comprehensive approach necessary to keep RAWS sensors functioning optimally.