The first constellation of satellites NOSS

In 1976 the United States began launching groups of satellites, for which in the literature has been called a NOSS (the abbreviation for Naval Ocean Surveillance System surveillance of the oceans for the Navy). Three satellites fly in a fixed configuration "triangle", and one object that was made a branch of the main spacecraft. Some time after "reset" and breeding the basic apparatus of the fourth was transferred to a higher orbit.

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