Assertion: satellite | /r/HasProperty | maintained within the 150 km box
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Source sentences:
text: With a group of co-located satellites, the task is complex as each satellite must be maintained within the 150 km box but kept at a suitable distance (typically over 5 km) from the other satellites in the group to avoid collision or mutual interference, at the same time expending the least possible fuel to prolong the life of the satellite.