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Sensors and Communications > Sensors > Flashcards

Sensors Flashcards

1
Q

The range of all possible EM radiation

A

Electromagnetic spectrum

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2
Q

All EM waves have?

A

Frequency, wavelength, energy

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3
Q

Longest wavelength and lowest frequency of all EM energy

A

Radio

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4
Q

Good for transmitting information penetrates haze, Light rain, snow, clouds, and smoke. Ideal for data links and remote-sensing

A

Microwaves

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5
Q

Smallest wavelength of any wave

A

Gamma-rays

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6
Q

The act of receiving an RF energy return that has contacted an object

A

Detection

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7
Q

The direction relative to the location of the radar

A

Azimuth

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8
Q

The distance to the target in nautical miles

A

Range

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9
Q

The targets elevation above ground level

A

Altitude

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10
Q

The time that the radar set is transmitting the RF energy during each pulse

A

Pulse Duration

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11
Q

The period when the radar is not transmitting

A

Resting time

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12
Q

The time from the leading edge of one pulse to the leading edge of the next

A

Pulse Repetition Time

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13
Q

The number of pulse repetition times per second. Measured in Hertz

A

Pulse Repetition Frequency

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14
Q

The origin of any radar signal and operation

A

Power source

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15
Q

The heart of the radar system. It controls and times the operation of various components of a radar system

A

Synchronizer

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16
Q

A measure of how well an object can hold thermal energy

A

Thermal capacity

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17
Q

Transmit the necessary long duration, high-powered pulses needed to detect targets at a great distance away

A

Pulse radars

18
Q

Transmits a series of passes, when echoes are received the radar compares the frequency of a transmitted pulse against that of the received echo

A

Pulsed Doppler radar

19
Q

Provides a high-resolution “photo like” image of the area of interest, making possible the detection of stationary targets

A

Synthetic aperture radar

20
Q

Allows a single antenna to alternately transmit and receive

A

Duplexer

21
Q

A comparison of the meeting efficiency of a graybody with that of a perfect emitter, the blackbody

A

Emissivity

22
Q

Is the standard against which reflectance and absorption are measured

A

Blackbody

23
Q

The combination of temperature and emissivity of a body

A

Radiometric temperature

24
Q

Separates the IR energy and directs it to the IR detector

A

Beam splitter

25
Q

Received through a turret window by a mirror lens and beam splitter

A

IR energy/video

26
Q

When any form of EM energy encounters a surface that does not absorb energy

A

Reflection of light

27
Q

The deviation of light from its original path because of the speed change

A

Refraction of light

28
Q

Occurs when light energy passes from one medium into another causing the energy to change velocity

A

Refraction

29
Q

Light containing all wavelengths of visible the spectrum

A

White light

30
Q

Designed to operate over a wide range of light levels from twilight the full sun

A

Daylight television

DTV

31
Q

Allows the user to see in conditions much too dark for the human eye or DTV camera

A

Low light television

LLTV

32
Q

Fused image settings are inputted by the sensor operator through?

A

Menu button interface and control panel letters

33
Q

When SO sets the ratio, the resulting videos known as?

A

Blended video

34
Q

Rely on your picture quality to exploit the FMV

A

Imagery analysts

35
Q

Level and gain or equivalent to brightness and contrast when viewing an?

A

IR image

36
Q

When should the SO focus the picture?

A

Throughout the mission

37
Q

The targeting laser in the MTS

A

Laser rangefinder/designator

LRD

38
Q

Used in conjunction with night vision equipment or LLTV

A

Laser target marker

LTM

39
Q

The maximum level of laser radiation to which a human can be exposed without adverse biological effects to the eye or skin

A

Maximum permissible exposure

MPE

40
Q

Are the major cause of tissue damage by a laser beam

A

Thermal effects

41
Q

Non-beam hazards

A

Electrical, chemical, and fire

Sensors and Communications (1 decks)

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