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ECO > Radar/Tracking > Flashcards

Radar/Tracking Flashcards

1
Q

Pulse Duration

A

Time that the radar set is transmitting RF energy

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2
Q

Pulse Repetition Frequency

A

The number of pulses per second that rdr transmits

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3
Q

Pulse Repetition Interval

A

Time required for a complete transmission cycle

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4
Q

Signal Strength

A

Signal or echo that is received when a pulse is reflected from target

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5
Q

Radar mile

A

distance that a radar pulse travels in 12.4 microsecs

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6
Q

Beam width

A

Distance in degrees between the half power points

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7
Q

Scan Duration

A

Time required for one complete scan, or cycle of the antenna

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8
Q

Range Resolution

A

Ability of the radar to separate two tgts close in range at apprx same azimuth

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9
Q

Minimum range

A

Shortest range at which a target may accurately be displayed on radar

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10
Q

Maximum theoretical range

A

Range from which an echo can return before the next succeeding pulse is tx

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11
Q

Gain

A

Ability of an antenna to concentrate its radiated energy in a particular direction

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12
Q

Chirping

A

Method of pulse coding that increases range resolution while keeping long range detection capability

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13
Q

Azimuth resolution

A

Ability of a radar to separate two targets close in azimuth at aprx same range

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14
Q

Which parameters affect the range resolution of a radar

A

Pulse Duration

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15
Q

Which parameters affect maximum theoretical range

A

PRF/PRI

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16
Q

Which parameter affects azimuth resolution

A

Beamwidth

17
Q

Which parameters affect rate at which data might be collected on target?

A

PRF/PRI, scan duration, beamwidth

18
Q

How are EW radars best described

A

360 search provide range and azimuth info on targets at all altitudes w/in 200 nm or more.

19
Q

What kind of scan, pulse width and beam do EW radars normally use?

A

Circular scan, long pulse width, narrow, vertical fan shaped beam

20
Q

HF radars usually use what kind of scan/

A

Vertical sector scan

21
Q

HF radars typically use an operating frequency in which frequency range?

A

2000-10000 MHz

22
Q

Compared to EW radars, acquisition radars typically have:

A

shorter pw, higher prf and narrower beam widths but have circular scans.

23
Q

What are the usual power and PRF characteristics of acquistion radars

A

lower power due to increased range resolution / higher PRF

24
Q

What type of beams does a V beam radar at a GCI site have?

A

vertical and slant

25
Q

GCI radars provide what info?

A

range, azimuth and altitude

26
Q

TT radars in general used what type of PW and beam width?

A

short pw, narrow beam width

27
Q

What type of information is normally provided by target illuminator radars

A

cont illumination of tgt

28
Q

MG radars normally use what type of scan

A

steady

29
Q

The direct threat radar that provides the most accurate info for missiles is what

A

Missile guidance

30
Q

Using each echo pulse from the tgt to determine a new azimuth and elevation correction signal is the def of what type of radar?

A

Monopulse

31
Q

Using 2 narrow beams, each pointing slightly off antenna boresight is the def of what ?

A

Sequential lobing

32
Q

Continuously rotating an offset antenna beam is the def of what

A

conical scan

33
Q

If a lobe on receive only mode of operation is used with a conical scan radar, the radar is called what

A

Conical scan on receive only COSRO

34
Q

What is the mode of transmitting on one antenna that does not scan and receiving on another antenna that scans called?

A

Lobe on Receive only

35
Q

If a lobe on receive only mode of operation is used w/a track while scan radar, the radar is called what?

A

Track while scan on receive only TWSRO

36
Q

What type of radar used calculations based on the freq difference between the transmitted pulse and the received echo?

A

Pulse Doppler

37
Q

Using 2 sep beams and 2 sep antennas on two diff freqs with one scanning in elevation and other scanning in horizontal is the def of what?

A

TWS

ECO (3 decks)

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