This is the 3263rd most frequent French word.
spatiale
"Spatiale" means "spatial" or "related to space."
Here, 'spatiale' is an adjective describing 'station', indicating that it pertains to outer space.
La station spatiale orbite autour de la Terre.
The space station orbits around Earth.
In this sentence, 'spatiale' describes 'intelligence', referring to awareness of space and spatial relationships, not outer space.
Elle a une intelligence spatiale exceptionnellement développée.
She has exceptionally developed spatial intelligence.
'Spatiale' acts as an adjective characterizing 'mission', indicating its relation to outer space endeavors.