Definition
The angle at which sunlight strikes the aircraft, runway, and surrounding terrain during a flight, which changes throughout the day and across the seasons. Low sun angles — typical in early morning, late afternoon, and winter months — produce strong glare, long shadows, and reduced forward visibility that can affect a pilot's ability to see traffic, runway markings, and outside references.
Plain English
How high or low the sun is in the sky during a flight. When the sun is low, it shines almost straight into the pilot's eyes, making it harder to see ahead, spot other aircraft, and read the runway clearly.
Context Anchor
Considered before solo flight, takeoff, landing, and practice around the airport, especially near sunrise or sunset.
Why Pilots Care
Poor sun angles can produce visual illusions that lead to misjudged landings or difficulty spotting traffic on a student's first solo.
Grounding Statement
A low sun straight ahead can make a clear day feel visually difficult because glare can hide important details.
Intuition Check
Sun angles are not just about how bright the day is. The key point is where the sun is shining from and whether that position affects what the pilot can see.
Example Sentence 1
The instructor scheduled the student's first solo for mid-morning to avoid the low sun angles that would make the westbound final approach difficult.
Example Sentence 2
Low sun angles in the late afternoon created long shadows that made the runway threshold appear closer than it was.