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EIDWS > 115 Space > Flashcards

115 Space Flashcards

1
Q

Describe Space Force Enhancement

A

5 Enhancement missions:

  • ISR (Intelligence, Surveillance, Reconnaissance)
  • Missile warning
  • Environmental monitoring
  • Satellite communications
  • PNT
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2
Q

Describe Space Support

A

Space lift operations (launching satellites), satellite operations, & reconstitution of space forces

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3
Q

Describe Space Control

A

Provides freedom of action in space & denies adversary

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4
Q

Describe Space Force Application

A

Defined as combat operations in, thru, & from space.

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5
Q

Describe how the Sun affects communications

A

Biggest effect on space environment; fueled by nuclear-fusion.

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6
Q

Describe how Solar Wind affects communications

A

Electronically charged particles that stream continuously from sun form Solar Wind. Degrades radar performance.

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7
Q

Describe how the Solar Cycle affects communications

A

11-year cycle. Generally, there’s a 4-year rise to a solar maximum followed by a gradual 7-year decline to solar minimum.

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8
Q

Describe how Van Allen Radiation Belts affect communications

A

Two concentric, donut-shaped regions of stable, trapped charged particles. Serious impact on satellite operations.

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9
Q

Describe how Atmospheric Drag affects communications

A

Energy deposited in earth’s upper atmosphere by charged particle bombardment heats atmosphere, causing it to expand outward over a period of time; produces more frictional drag on a satellite.

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10
Q
  • Identify Low Earth Orbits
A

Altitudes between 150 and 800 miles above earth’s surface

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11
Q
  • Identify Medium Earth Orbits
A

Semi-Synchronous Orbit: Purpose is to allow a user to receive signals from multiple satellites at any time.

Sun-Synchronous Orbit: Takes advantage of precession of orbital plane caused by earth not being a perfect sphere. If a satellite’s orbital period is synchronized with rotation of earth, it will pass over same point on earth’s surface at same local time, at a regular interval.

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12
Q
  • Identify Highly Elliptical Orbits
A

Slows down at apogee (farthest away) & whips through perigee (closest)

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13
Q
  • Identify Geosynchronous Orbits
A

Satellites remain over same area of earth

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14
Q
  • Identify Polar Orbits
A

Used extensively by imagery satellites due to ability to pass over entire surface of earth throughout several days.

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15
Q

Define Apogee

A

Point on the orbit FARTHEST from the surface of the earth

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16
Q

Define Perigee

A

Point on the orbit CLOSEST from the surface of the earth

17
Q

What are the two main space launch facilities in the U.S.?

A
  • Kennedy Space Center, FL

- Vandenberg AFB, CA

18
Q

Discuss Navy UHF Follow-on

A

Replace aging FLTSATs, features higher power transmitters

19
Q

Discuss DSCS (Defense Satellite Communications Systems)

A

Provides worldwide, jam-resistant, secure, voice & high data rate communications for C2.

20
Q

Discuss GBS (Global Broadcast Service)

A

Uses high-powered transponders to provide HDR wideband simplex broadcast signals.

21
Q

Discuss WGS (Wideband Global Satellite)

A

Designed to provide high capacity communications to U.S. military forces

22
Q

Describe GPS (Global Positioning System)

A

Space-based radio positioning systems that provide 24/7 3-dimensional position, velocity & time info to suitably equip users on/near earth’s surface.

23
Q

What are the advantages of Space-based ISR?

A
  • *Potential to provide systematic and focused coverage of areas of information
  • Supports full range military intelligence activities including indication & warnings (I&W), current intelligence, OOB, targeting, & combat assessments
  • Imagery is also used to conduct mission planning and rehearsal
24
Q

What are the disadvantages of Space-based ISR?

A
  • *Access limitations and a predictable over flight schedule

- *Variety of atmospheric disturbances

25
Q

Discuss space situational awareness

A
  • Ensures space operations and spaceflight safety
  • Implements international treaties & agreements
  • Protects space capabilities
  • Protects military operations & national interests
26
Q

Define Astronomy

A

Relates to precise measurements & explanations of positions & movements of stars & other celestial bodies.

27
Q

Define Earth Orientation Parameters

A

Describes irregularities of Earth’s rotation

28
Q

Discuss the role of precise time in the following:

  • GPS
  • Geo-location
  • Network synchronization
A
  • GPS: Uses a minimum of 4 visible satellites
  • Geo-location: Uses time difference of arrival to determine location
  • Network synchronization: Provides millisecond accuracy for DoD systems

EIDWS (24 decks)

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