NAVEDTRA 14189A Chapter 4 Flashcards

1
Q

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

A

1957

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2
Q

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

A

1958

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3
Q

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

A

1960

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4
Q

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

A

1962

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5
Q

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

A

Passive

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6
Q

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

A

Repeater

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7
Q

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

A

Circular

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8
Q

What is a period of orbit that approaches that of Earth called?

A

Near Synchronous

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9
Q

All satellites orbit the Earth in which type of orbits?

A

Elliptical

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10
Q

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

A

Apogee

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11
Q

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

A

Angle of inclination

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12
Q

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

A

Inclined

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13
Q

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

A

Equatorial

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14
Q

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

A

19,300

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15
Q

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?

A

12,000

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16
Q

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

A

32,000

17
Q

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?

A

20

18
Q

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

A

Ephemeris

19
Q

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?

A

Hand over

20
Q

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

A

Three

21
Q

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

A

19,500

22
Q

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

A

1983

23
Q

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

A

1984

24
Q

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

A

NTP-2

25
Q

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

A

Zone of Mutual visibility