Fcc Grol Element 3P

Front 1

3-95P1

What is the orbiting altitude of the Iridium satellite communications system?

Back 1

485 miles

Front 2

3-95P2

What frequency band is used by the Iridium system for telephone and messaging?

Back 2

1616 -1626 MHz

Front 3

3-95P3

What services are provided by the Iridium system?

Back 3

Digital voice and Data at 2.4 kbps

Front 4

3-95P4

Which of the following statements about the Iridium system is true?

Back 4

There are 48 spot beams per satellite with a footprint of 30 miles in diameter

Front 5

3-95P5

What is the main function of the COSPAS-SARSAT satellite system?

Back 5

Monitor 406 MHz for distress calls from EPIRBs

Front 6

3-95P6

How does the COSPAS-SARSAT satellite system determine the position of a ship in distress?

Back 6

By measuring the Doppler shift of the 406 MHz signal taken at several different points in its orbit

Front 7

3-96P1

What is the orbital altitude of INMARSAT Satellites?

Back 7

22,177 miles

Front 8

3-96P2

Which of the following describes the INMARSAT Satellite system?

Back 8

AOR-E at 15.5 W, AOR-W at 54 W, POR at 178 E and IOR at 64.5 E

Front 9

3-96P3

What are the directional characteristics of the INMARSAT-C SES antenna?

Back 9

Omnidirectional

Front 10

3-96P4

When engaging in voice communications via an INMARSAT-B terminal, what techniques are used?

Back 10

CODECs are used to digitize the voice signal

Front 11

3-96P5

Which of the following statements concerning INMARSAT geostationary satellites is true?

Back 11

They provide coverage to vessels in nearly all of the world’s navigable waters

Front 12

3-96P6

Which of the following conditions can render INMARSAT -B communications impossible?

Back 12

All of these:

A. An obstruction, such as a mast, causing disruption of the signal between the satellite and the SES antenna when the vessel is steering a certain course.
B. A satellite whose signal is on a low elevation, below the horizon.
C. Travel beyond the effective radius of the satellite.

Front 13

3-97P1

What is the best description for the INMARSAT-C system?

Back 13

It is a store-and-forward system that provides routine and distress communications

Front 14

3-97P2

The INMARSAT mini-M system is a:

Back 14

Satellite system utilizing spot beams to provide for small craft communications

Front 15

3-97P3

What statement best describes the INMARSAT-B services?

Back 15

Voice at 16 kbps, Fax at 14.4 kbps and high-speed Data at 64/54

Front 16

3-97P4

Which INMARSAT systems offer High Speed Data at 64/54 kbps?

Back 16

B, M4 and Fleet

Front 17

3-97P5

When INMARSAT-B and INMARSAT-C terminals are compared:

Back 17

INMARSAT-C antennas are small and omni-directional, while INMARSAT-B antennas are larger and directional

Front 18

3-97P6

What services are provided by the INMARSAT-M service?

Back 18

Voice at 6.2 kbps, Data at 2.4 kbps, Fax at 2.4 kbps and e-mail

Front 19

3-98P1

Global Positioning Service (GPS) satellite orbiting altitude is:

Back 19

12,554 miles

Front 20

3-98P2

The GPS transmitted frequencies are:

Back 20

1227.6 MHz and 1575.4 MHz

Front 21

3-98P3

How many GPS satellites are normally in operation?

Back 21

24

Front 22

3-98P4

What best describes the GPS Satellites orbits?

Back 22

They are in six orbital planes equally spaced and inclined about 55 degrees to the equator

Front 23

3-98P5

How many satellites must be received to provide complete position and time?

Back 23

4

Front 24

3-98P6

What is DGPS?

Back 24

A system to provide additional correction factors to improve position accuracy