Which term is used for elements such as sky condition, visibility, and present weather when augmented observations use fixed time and spatial averaging?

• A. Subjective Elements
• B. Objective Elements
• C. AMOS Observations
• D. Local Observations

Answer: (A)

The key idea is that some weather elements are based on human judgment rather than instrument readings, even when observations are standardized by fixed time and spatial averaging. Sky condition, visibility, and present weather are interpreted by the observer—cloud amount, how far you can see, and the type of weather phenomena—so they depend on perception and description. When observations are averaged over time and space, these aspects remain subjective because they cannot be fully quantified by instruments alone. Therefore they’re labeled as subjective elements. Objective elements, by contrast, come from direct instrument measurements. The other terms refer to systems or sources rather than the nature of the observation itself, so they don’t fit as the category for these kinds of elements.