This means the sun must be below the observer's horizon (night or early morning), but the satellite must be in sunlight.
(the satellite; must be; in sunlight) (This; means; the sun must be below the observer's horizon (night or early morning) Context(This means,List([0, 10))):(the sun; must be; below the observer's horizon; T:night or early morning)
This means,List([0, 10))
the satellite This the sun
must be means must be
in sunlight
the sun must be below the observer's horizon (night or early morning
below the observer's horizon T:night or early morning