NAVEDTRA 14189A, Ch. 4

Question 1

Which year was the first artificial satellite placed in orbit by the Russians?

Answer 1

1957

Question 2

Score was the first satellite with the primary purpose of communications by the US in which year?

Answer 2

1958

Question 3

Which year was the first regular satellite communications service used by the Navy?

Answer 3

1960

Question 4

Which year was the Defense Communications Satellite Program (DCSP) initiated by the Secretary of Defense?

Answer 4

1962

Question 5

Which type of satellite only reflects received radio signals back to earth?

Answer 5

Passive

Question 6

What amplifies signals received and then retransmits them back to earth?

Answer 6

Repeater

Question 7

In general terms, an orbit is either elliptical or which other shape?

Answer 7

Circular

Question 8

What is a period of orbit that approaches that of the earth called?

Answer 8

Near Synchronous

Question 9

All satellites orbit the earth in which type of orbits?

Answer 9

Elliptical

Question 10

What is the point in the orbit called when it is the greatest distance from the center of the earth?

Answer 10

Apogee

Question 11

What is the angle between the equatorial plane of the earth and the orbital plane of the satellite called?

Answer 11

Angle of inclination

Question 12

A satellite orbiting in any plane not identical with the equatorial plane is in which type of orbit?

Answer 12

Inclined

Question 13

Which type of orbit is defined by a satellite orbiting in a plane that coincides with the equatorial plane of the earth?

Answer 13

Equatorial

Question 14

A satellite in a circular orbit at a height of approximately how many nautical miles above the earth is in a synchronous orbit?

Answer 14

19,300

Question 15

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?

Answer 15

12,000

Question 16

About how many solar cells mounted on the surface of the satellite do newer communications satellites have?

Answer 16

32,000

Question 17

Generally speaking, how many sizes of parabolic-type antennas are currently in use at earth terminal sites?

Answer 17

Three

Question 18

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?

Answer 18

20

Question 19

Which table provides the coordinates of a satellite or a celestial body at specific times during a given period?

Answer 19

Ephemeris

Question 20

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?

Answer 20

Hand over

Question 21

The smallest terminal in the defense communication systems network has effectively an 18-foot antenna and weighs how many pounds?

Answer 21

19,500

Question 22

Which year did the Department of the Navy establish the Naval Space Command?

Answer 22

1983

Question 23

Which year was the first DSCS Phase III satellite launched into orbit?

Answer 23

1984

Question 24

Which publication was written to concisely explain the role of the Navy in the Defense Communications Satellite Program?

Answer 24

NTP-2

Question 25

What is the zone called where the satellite can be seen by both the up- and down-link earth terminals?

Answer 25

Zone of Mutual visibility