Assertion: satellite | /r/HasProperty | visible
Facets:
value: always
type: DEGREE
value: from any point on the ground
type: LOCATION
value: at any one time
type: TEMPORAL
value: with the expanded constellation
type: OTHER
value: with visible
type: OTHER
value: as with gps
type: OTHER
value: because of their low altitude
type: CAUSE
value: at a typical magnitude of 6
type: OTHER
value: often
type: TEMPORAL
value: for a receiver
type: TRANSITIVE-OBJECT
value: for a part of their orbit
type: TEMPORAL
Source sentences:
text: As with GPS, for a receiver the satellites are only visible for a part of their orbit, therefore multiple satellites are necessary to establish a permanent internet connection, with low-Earth orbits needing more satellites than medium-Earth orbits.
text: When not flaring, the satellites were often visible crossing the night sky at a typical magnitude of 6, similar to a dim star.
text: Because of their low altitude, these satellites are only visible from within a radius of roughly 1,000 kilometres (620 mi) from the sub-satellite point.
text: Due to satellite having in the geosynchronous orbit it is visible all the time from the earth and no tracking is needed.
text: At least one satellite is always visible, with another often visible as well.
text: Some GPS receivers may use additional clues or assumptions such as reusing the last known altitude, dead reckoning, inertial navigation, or including information from the vehicle computer, to give a (possibly degraded) position when fewer than four satellites are visible.
text: With the expanded constellation, nine satellites are usually visible from any point on the ground at any one time, ensuring considerable redundancy over the minimum four satellites needed for a position.
text: The satellite remained in orbit for almost eight years and was visible as a rapidly moving “star” in the evening skies.
text: An observer at any place where the satellite is visible will always see it in exactly the same spot in the sky, unlike stars and planets that move continuously.