NAVEDTRA 14189A, Ch. 4 Flashcards
Which year was the first artificial satellite placed in orbit by the Russians?
1957
Score was the first satellite with the primary purpose of communications by the US in which year?
1958
Which year was the first regular satellite communications service used by the Navy?
1960
Which year was the Defense Communications Satellite Program (DCSP) initiated by the Secretary of Defense?
1962
Which type of satellite only reflects received radio signals back to earth?
Passive
What amplifies signals received and then retransmits them back to earth?
Repeater
In general terms, an orbit is either elliptical or which other shape?
Circular
What is a period of orbit that approaches that of the earth called?
Near Synchronous
All satellites orbit the earth in which type of orbits?
Elliptical
What is the point in the orbit called when it is the greatest distance from the center of the earth?
Apogee
What is the angle between the equatorial plane of the earth and the orbital plane of the satellite called?
Angle of inclination
A satellite orbiting in any plane not identical with the equatorial plane is in which type of orbit?
Inclined
Which type of orbit is defined by a satellite orbiting in a plane that coincides with the equatorial plane of the earth?
Equatorial
A satellite in a circular orbit at a height of approximately how many nautical miles above the earth is in a synchronous orbit?
19,300
A satellite in a circular orbit from approximately 2,000 miles to how many miles above the earth is considered to be in a medium altitude orbit?
12,000
About how many solar cells mounted on the surface of the satellite do newer communications satellites have?
32,000
Generally speaking, how many sizes of parabolic-type antennas are currently in use at earth terminal sites?
Three
Depending on the type used and the operational requirements, transmitters used in earth terminals have output power capabilities that vary from 10 watts to how many kilowatts?
20
Which table provides the coordinates of a satellite or a celestial body at specific times during a given period?
Ephemeris
What is the period of time called for one earth terminal to yield control to another as a satellite moves out of its area of coverage?
Hand over
The smallest terminal in the defense communication systems network has effectively an 18-foot antenna and weighs how many pounds?
19,500
Which year did the Department of the Navy establish the Naval Space Command?
1983
Which year was the first DSCS Phase III satellite launched into orbit?
1984
Which publication was written to concisely explain the role of the Navy in the Defense Communications Satellite Program?
NTP-2
What is the zone called where the satellite can be seen by both the up- and down-link earth terminals?
Zone of Mutual visibility
