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RADar > 3D155 Volume 3 URE > Flashcards

3D155 Volume 3 URE Flashcards

1
Q

what is the transmit frequency range of the AN/GPN-30 primary surveillance radar (PSR)?

A

2700-2900 MHz

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2
Q

what is the AN/GPN-30 digital airport surveillance radar (DASR) target range in a normal configuration for the primary surveillance radar (PSR)?

A

60 nautical miles

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3
Q

how long is the AN/GPN-30 digital airport surveillance radar (DASR) chirp transmitted pulse width?

A

89 usec

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4
Q

what two types of polarization are available in the AN/GPN-30 primary surveillance radar (PSR)?

A

circular and linear

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5
Q

how many interrogator groups does each monopulse secondary surveillance radar (MSSR) site have?

A

two

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6
Q

the transmitter center frequency for the monopulse secondary surveillance radar (MSSR) is

A

1030 MHz

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7
Q

what is the center frequency of the AN/GPN-30 monopulse secondary surveillance radar (MSSR) receiver?

A

1090 MHz

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8
Q

The AN/GPN-30 monopulse secondary surveillance (MSSR) intermediate frequency (IF) is

A

60 MHz

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9
Q

at what range does the AN/GPN-30 primary surveillance radar (PSR) perform beam switching from high beam to low beam?

A

6.5 nautical miles

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10
Q

In the AN/GPN-30 DASR, what is the purpose of the two processing channels in each receiver/exciter/signal data processor (REX/SDP)?

A

process target and weather returns separately

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11
Q

what happens to the AN/GPN-30 primary surveillance radar (PSR) weather port returns when switching from linear to circular polarization?

A

8 dB gain

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12
Q

what are false reports that occur because of discontinuities in the air, such as a temperature inversion?

A

anomalous propagation

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13
Q

which AN/GPN-30 primary surveillance radar (PSR) feed horn is used for receive only?

A

high beam

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14
Q

what is the purpose of the AN/GPN-30 primary surveillance radar (PSR) high beam feed horn assembly?

A

reduce ground clutter

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15
Q

what subassembly houses the AN/GPN-30 digital airport surveillance radar (DASR) weather beam switch?

A

antenna assembly

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16
Q

user interface to the AN/GPN-30 digital airport surveillance radar (DASR) system via an operator’s terminal is provided by two

A

site control and data interfaces (SCDI)

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17
Q

in the AN/GPN-30 digital airport surveillance radar (DASR), what prevents you, the technician from having to reload software in the event of a power failure for up to 20 minutes?

A

uninterruptable power supply (UPS)

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18
Q

how many modes is the monopulse secondary surveillance radar (MSSR) capable of interrogating?

A

4

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19
Q

In the secondary surveillance radar system, the proper pulse spacing for Mode C s

A

21 usec

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20
Q

what is the pulse spacing of a Mode B interrogation in the secondary surveillance radar system?

A

17 usec

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21
Q

what is the pulse spacing of p1 to p3 in a mode 3/a interrogation in the secondary surveillance radar system?

A

8 usec

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22
Q

in traditional beacon radar, during transmit, p2 is radiated out of he control radiation pattern and used for interrogator side lobe suppression (ISLS) for what is this pattern used for during the monopulse secondary surveillance radar (MSSR) receive cycle?

A

receiver side lobe suppression (RSLS)

23
Q

what is the main radiation pattern for the monopulse secondary surveillance radar (MSSR)?

A

sum

24
Q

in the AN/GPN-30 monopulse secondary surveillance radar (MSSR), what process compares the phase and amplitude of the Sum and Difference receive radiation patterns?

A

monopulse azimuth determination

25
Q

what is the phase relationship of Sum and Difference at the output of the hybrid ring in the monopulse secondary surveillance radar (MSSR) if the target is right of boresight?

A

sum lags difference by 90 degrees.

26
Q

the major components of the monopule secondary surveillance radar (MSSR) interrogator are the

A

transmitter, receiver, tracker, and plot processor

27
Q

when speaking of the monopule secondary surveillance radar (MSSR), the sum, difference, and control patterns are created by the

A

large vertical aperture (LVA) antenna

28
Q

upon detection of an interrogator fault in the operating channel, which monopule secondary surveillance radar (MSSR) unit switches to the standby interrogator channel?

A

RF changeover unit (RFCO)

29
Q

the airborne unit that responds to monopulse secondary surveillance radar (MSSR) interrogation pulses is the

A

transponder

30
Q

the specialized test set used to maintain the monopulse secondary surveillance radar (MSSR) is the

A

monopulse beacon test set (MBTS)

31
Q

what is used to check monopulse beacon test set (MBTS) performance?

A

built in test (BIT) module

32
Q

what is the name of the operating system standard terminal automation replacement system (STARS) is built on?

A

UNIX

33
Q

unix was originally created by

A

at&t’s bell labs division

34
Q

unix was originally developed to improve the performance of

A

a computer game

35
Q

a good example of open source software is

A

unix

36
Q

unix is composed of what two parts?

A

the kernel and the shell

37
Q

the cor of the unix operating system that controls the hardware resources is the

A

kernel

38
Q

the component of unix that provides an interface between the user and the system core is the

A

shell

39
Q

the three levels of unix permissions available to users are

A

user, group, and other.

40
Q

the function of the standard terminal automation replacement system (STARS) central support complex (SCSC) is to

A

provide centralized software and hardware development

41
Q

what is one activity of the system central support complex (SCSC)?

A

distribute software to operational support facilities (OSF)

42
Q

how many regional operational support facility (OSF) sites support both federal aviation administration (FAA) and DOD standard terminal automation replacement system (STARS) sites?

A

nine

43
Q

one purpose of a standard terminal automation replacement system (stars) operational support facility (osf) is to

A

develop sos site specific adaptation data for software releases

44
Q

which standard terminal automation replacement system site provides the automation of air traffic data to support air traffic control (ATC) within the dod radar approach control (RAPCN) and the federal aviation administratino (fa) terminal radar approach control (TRACON) terminal control areas?

A

stars operational site (SOS)

45
Q

the standard terminal automation replacement system (StARS) system replaces

A

PIDP II, DBRITE, and ARTS

46
Q

the standard terminal automation replacement system (STars) tracks up to 1350 aircraft and covers and area of how many square nautical miles?

A

400

47
Q

the core of the standard terminal automation replacement system (STARS) air traffic control operation that accomplishes radar data display, operator interaction, and data recording is the

A

terminal automation substation (TAS)

48
Q

how many types of workstations are used in standard terminal automation replacement system (StARS)?

A

four

49
Q

how many different types of displays, or monitors, can be used with standard terminal automation replacement system (STARS)?

A

five

50
Q

what is the resolution of the sony data display monitor (DDM) or terminal controller workstations (TCW)?

A

2048 by 2048.

51
Q

what is the monitor display area of the sony data display monitor (DDM) or terminal controller workstation (TCW)?

A

19.6 by 19.6 inches

52
Q

operational adjustments and alignments of the sony data display monitor (DDM) are made by

A

a remote controller

53
Q

what is used for easy identification of sony data display monitor (DDM) modules?

A

letter designators

54
Q

where is the sony data display monitor’s circuitry required to direct and guide the electron beam?

A

deflection yoke.

RADar (9 decks)

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