This is the 10947th most frequent Russian word.
высотных
"Высотных" means "high-altitude" or "tall" (related to height).
Here 'высотных' modifies 'зданий' (buildings), describing them as tall, typically implying skyscrapers or high-rise constructions.
Высотных зданий много в центре города.
There are many tall buildings in the city center.
In this sentence, 'высотных' describes 'точках наблюдения' (observation points), emphasizing their elevated or high-altitude nature.
Он чувствует себя не комфортно на высотных точках наблюдения.
He feels uncomfortable at high observation points.
Here 'высотных' modifies 'радаров' (radars), referring to their function or application at high altitudes.