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Elective 3 Reviewer > Satellite Communication > Flashcards

Satellite Communication Flashcards

1
Q

____ was drifted to 3-degrees West orbital slot.

A

Agila 2 or ABS-5

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2
Q

Contained within the repeater are the _____.

A

transponders

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3
Q

Elements of Antennas

A

reflectors
feeds
feed networks
support
structure and pointing mechanisms

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4
Q

____ is the business-end of the satellite

A

payload

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5
Q

Sputnik 2 was launched on ____.

A

November 3, 1957

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6
Q

Sputnik 2 carried the first living passenger into orbit a dog named ____.

A

Laika

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7
Q

Derived from the Latin word ____ meaning guard, attendant or companion.

A

Satelles

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8
Q

The United States’ Global Positioning System (GPS) consists of up to ________ with the exact number of satellites varying as older satellites are retired and replaced.

A

32 MEO satellites in six (6) different orbital planes (31 working, 1 spare)

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9
Q

An orbit around planet Mars.

A

Areocentric

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10
Q

Renamed it to ____ and remain in service until June 2014.

A

ABS-3

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11
Q

____ to maintain the electronics and other components within a safe temperature range over the life of the satellite.

A

Thermal control

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12
Q

____ out of 5,465 belongs to the United States.

A

3, 433

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13
Q

A ____ consists of a number of electronic components onboard the satellite.

A

transponder

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14
Q

A geostationary orbit stays exactly ______.

A

above the equator

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15
Q

A semi-synchronous variation of a Tundra orbit. For Earth this means an orbital period of just under 12 hours.

A

Molniya Orbit

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16
Q

This is a TV signal distribution system designed to distribute signals directly to consumers.

A

Direct Broadcast Satellite (DBS) service

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17
Q

Explorer 1 was launched on ___.

A

January 31, 1958

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18
Q

____ is currently the world’s most utilized satellite navigation system.

A

GPS

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19
Q

____ is the time it takes for a satellite to complete

A

period

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20
Q

The basic elements of a communication satellite service:

A

Space Segment
Ground Segment

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21
Q

Narration About Four Satellites of Jupiter Observed

A

Johannes Kepler, 1610

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22
Q

Refers to an object orbiting a planet

A

Satellite

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23
Q

Typical rotational periods range from about ____ for a 100-mi height to 24 h for a 22,300-mi height.

A

1 ½ h

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24
Q

NAVSTAR GP, operational since ____ and globally available since _____.

A

1978
1994

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25
Q

A path described by one body in its revolution.

A

Orbit

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26
Q

____ act as relay stations in the sky and permit reliable long-distance communication worldwide.

A

Communication satellites

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27
Q

Global Navigation Satellite System

A

NAVSTAR GPS
GLONASS
GALILEO

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28
Q

An orbit around the Sun.

A

Heliocentric

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29
Q

As of ____, there are 5,465 operational (active) satellites in orbit around the Earth.

A

April 20, 2022

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30
Q

Diwata-1 was deployed into orbit from the ISS in _____.

A

April 27, 2016

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31
Q

Particular Group of Applications

A

Video distribution
Data communication
Telephone services

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32
Q

The ____ create “footprint” coverage but require the repeater to receive and transmit the actual signals from and to the ground.

A

antennas

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33
Q

____ systems can provide global coverage unavailable with land based systems satellites.

A

Satellite navigation

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34
Q

An orbit whose period is a rational multiple of the average rotational period of the body being orbited and in the same direction of rotation as that body.

A

Synchronous

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35
Q

Built by ____, the satellite provides the most powerful coverage in the Asia Pacific region.

A

Space Systems/Loral

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36
Q

Has an inclination of ____.

A

90 degrees

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37
Q

Agila 2 provides telecommunications services for the Mabuhay Philippines Satellite Corporation before being sold to ABS in ___.

A

2009

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38
Q

The system can be used for providing position, navigation or for tracking the position of something fitted with a receiver (satellite tracking).

A

SatNav

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39
Q

____ was launched in March 20, 1987 under the name ____ in Cape Canaveral Air Force Station.

A

Agila-1 or Mabuhay
Palapa B2-P

40
Q

An orbit whose inclination in reference to the equatorial plane is not 0.

A

Inclined

41
Q

Circular orbits are _____.

A

simplest

42
Q

All geostationary orbits must be geosynchronous, but not all geosynchronous orbits are geostationary.

A

True

43
Q

An orbit whose inclination is equal to zero with respect to some plane of reference.

A

Non-inclined

44
Q

____ contains the support vehicle and control subsystems that allow the payload to perform its mission as a microwave repeater in space.

A

BUS

45
Q

It is the first Philippine microsatellite and the first satellite built and designed by Filipinos.

A

Diwata-1

46
Q

An orbit around planet Earth.

A

Geocentric

47
Q

An orbit around the center of galaxy.

A

Galactocentric

48
Q

____ is a system that uses satellites to provide autonomous geo-spatial positioning.

A

SatNav

49
Q

____ to assure that the antennas are pointed at the ground.

A

Attitude and spacecraft control processing

50
Q

____ to hold everything together and protect the subsystems during launch and after deployment on orbit.

A

Structure

51
Q

This time is also called the _____.

A

sidereal period

52
Q

____ to be used to correct the orbit.

A

Reaction control system (propulsion)

53
Q

____ consist of the spacecraft & launch mechanism

A

space segment

54
Q

Geocentric orbits ranging in altitude from 2,000 km (1,240 miles) to just below geosynchronous orbit.

A

Medium Earth Orbit

55
Q

First artificial satellite launched by Soviet Union (USSR)

A

Sputnik 1

56
Q

Particular Group of Users

A

Corporate enterprise
Government agency
Non-profit organization
Internet service provider

57
Q

It is an Artificial object which has been intentionally placed into orbit.

A

Artificial Satellite

58
Q

The First artificial satellite of the United States.

A

Explorer 1

59
Q

Orbits around Earth matching Earth’s sidereal rotation period.

A

Geosynchronous or Geostationary Orbit

60
Q

____ is the use of satellite technology in the field of communications.

A

Satellite communications

61
Q

An orbit with an orbital period equal to half of the average rotational period of the body being orbited and in the same direction of rotation as that body.

A

Semi-synchronous

62
Q

____ was launched by Long March 3B in 1997 at China.

A

Agila 2 or Mabuhay 1

63
Q

A nearly polar orbit that passes the equator at the same local solar time on every pass.

A

Polar Sun-synchronous

64
Q

____ to provide all of the prime power.

A

Solar panels

65
Q

It allows small electronic receivers to determine their location (longitude, latitude, and altitude/elevation) to high precision (within a few metres) using time signals transmitted along a line of sight by radio from satellites.

A

SatNav

66
Q

____ also known as PHL-Microsat-1

A

Diwata-1

67
Q

____ to operate the satellite when it is hidden from the sun by the earth or moon (called eclipse, happening for up to 70 minutes a day during equinox season).

A

Batteries

68
Q

____ is the latest satellite launched in the outer space last March 4, 2024.

A

STARLINK-31270

69
Q

It was originally under Indonesian Company, PT Pasifik Satelit Nusantara until it was acquired by Philippine Company, Mabuhay Satellite Corporation which is under PLDT in ____.

A

1996

70
Q

The ____ is a network of earth stations and user terminals that provides applications and services to end users.

A

ground segment

71
Q

A geosynchronous orbit may swing ____ to cover more of the Earth’s surface.

A

north and south

72
Q

____ launched on ____ is set to replace ABS-3 which has long exceeded it design life.

A

ABS-3A
March 2015

73
Q

A synchronous but highly elliptic orbit with significant inclination (typically close to 63.4°) and orbital period of one sidereal day (23 hours, 56 minutes for the Earth).

A

Tundra Orbit

74
Q

Orbit changes can be used to ______.

A

extend the life of satellites

75
Q

An orbit that passes above or nearby above both poles of the planet on each revolution.

A

Polar

76
Q

The satellite’s operation ended in ____ and was deorbited.

A

January 1998

77
Q

The signals also allow the electronic receiver to calculate the ____, which allows time synchronization.

A

current local time to high precision

78
Q

Geocentric orbits with altitudes from
160 to 2,000 km (100–1,240 mi).

A

Low Earth Orbit (LEO)

79
Q

The European Union and European Space Agency agreed in March 2002 to introduce their own alternative to GPS, called the _____.

A

Galileo positioning system

80
Q

The ITU has grouped the satellite services in to three main groups:

A

Fixed Satellite Services (FSS)
Broadcast Satellite Services (BSS)
Mobile Satellite services (MSS)

81
Q

Classification of Satellite:

A

Natural and Artificial

82
Q

____ can be used to give quasi stationary behavior viewed from earth

A

Elliptical orbits

83
Q

The Galileo system consists of ____ is expected to be compatible with the modernized GPS system.

A

30 MEO satellites in three (3) different orbital planes (24 working, 6 spare)

84
Q

Satnav systems operate independently of any ____ though these technologies can enhance the usefulness of the positioning information generated.

A

telephonic or internet reception

85
Q

An orbit around the Earth with a period equal to one sidereal day, which is Earth’s average rotational period of 23 hrs, 56 min., 4.091 sec.

A

Geosynchronous (GSO)

86
Q

____ is the period of time that elapses between the successive passes of the satellite over a given meridian of earth longitude.

A

One revolution

87
Q

A circular geosynchronous orbit with
an inclination of zero.

A

Geostationary Orbit (GEO)

88
Q

The proposed new systems use low-earth-orbit satellites to perform the relay services to the main telephone system or to make connection directly between any two cellular telephones using the system.

A

Satellite Cell Phones

89
Q

Diwata-1 is a Philippine microsatellite launched to the International Space Station (ISS) in _____.

A

March 23, 2016

90
Q

____ can look at the earth and transmit what they see back to ground stations for a wide variety of purposes, including military intelligence, meteorological applications, and mapping.

A

Surveillance satellites

91
Q

The full orbital constellation of ______ enables full global coverage.

A

27 MEO satellites in three (3) different orbital planes (24 working, 3 spare)

92
Q

Inclined orbits are useful for coverage of ______.

A

equatorial regions

93
Q

____ comprises the earth station and network control center of entire satellite system.

A

ground segment

94
Q

Types of Repeaters

A

microwave receivers
RF multiplexer
power amplifiers
channel processing and switching

95
Q

The ____, is a space-based satellite navigation system that provides a civilian radionavigation-satellite service.

A

Russian, Global’naya Navigatsionnaya Sputnikovaya Sistema, Global Navigation Satellite System), or GLONASS

96
Q

Geocentric orbits above the altitude
of geosynchronous orbit.

A

High Earth Orbit

97
Q

Date of Sputnik 1 launched.

A

October 4, 1957

Elective 3 Reviewer (10 decks)

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