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RADar > 3D155 Volume 3 EOC > Flashcards

3D155 Volume 3 EOC Flashcards

1
Q

DASR, The PSR solid state transmitter has how many amplifier modules?

A

8

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2
Q

DASR, what is the target range of the psr?

A

60nm

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3
Q

DASR, what is the minimum peak output power for the psr?

A

long pulse-18KW

short pulse-19.5KW

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4
Q

DASR, what is the psr pulse compression ratio?

A

89:1

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5
Q

DASR, what is the psr target capacity?

A

700 tracks or 1000 plots

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6
Q

MSSR, The MSSR has how many interrogators?

A

2

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7
Q

MSSR, What is the center frequency of the MSSR transmitter?

A

1030 +/-.01MHz

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8
Q

MSSR, What is the MSSR receiver sensitivity?

A

Better than -90 dBm

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9
Q

MSSR, What is the MSSR receiver center frequency?

A

1090 +/-.5MHz

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10
Q

DASR, what radar technology was developed in 1948 to correct ground clutter problems?

A

MTI

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11
Q

DASR, what is ‘blind speed’ and what radar technique is sued to fight it?

A

at certain speeds the Doppler shift of a target aligns with the PRT and the target becomes invisible to the radar; staggered prt are used to reduce blind speeds.

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12
Q

DASR, what is the tangential problem, and how has the DASR solved it?

A

when an aircraft flies tangentially (90 degrees) from the radar and has a zero radial velocity because the aircraft is not moving towards or away from the radar and MTI cancels it; MTD can track zero velocity targets because it uses a clutter map to cancel ground clutter.

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13
Q

DASR, what are ‘dim speeds’, and what are the known dim speeds for the DASR?

A

similar to blind speeds, where probability of detection of a target is decreased; 80 and 700 knots.

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14
Q

DASR, what function does the DASR use to prevent ‘second time around’ target problems?

A

m of n, or binary integrator.

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15
Q

DASR, what two solutions allow the DASR to use solid state transmitters?

A

multiple amplifier modules and pulse compression.

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16
Q

DASR, which feed horn path is used for receive only?

A

high beam

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17
Q

DASR, what is the sensitivity of the target and weather ports while in circular polarization?

A

circular polarization reduces target port sensitivity by 3dB while increasing the weather port sensitivity by 8dB making both of them 3dB

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18
Q

DASR, what polarization mode is used in bad weather?

A

circular

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19
Q

DASR, which component of Unit 7 provides the user interface to the system by way of an operator’s terminal?

A

two sun workstations or SCDI.

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20
Q

DASR, how many receive channels does the DASR have? how many receivers are in each channel?

A

two channels; three receivers each

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21
Q

DASR, how many transmitter amplifier modules does the psr have?

A

eight

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22
Q

DASR, what TCMM card detects antenna/transmitter group VSWR, PW, and duty cycle faults and generates an El signal, and what does the El signal do?

A

the transmitter rF monitor CCA; El disable sthe RF drivers.

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23
Q

MSSR, what is the main reason that secondary radar can not be relied upon as the sole radar feed?

A

a secondary radar system cannot operate without target cooperation.

24
Q

MSSR, how many challenge modes are available to the mssr, and what are they?

A

four; modes 2/3/c/b

25
Q

MSSR, what is the mssr side lobe suppression process called, and how does this process work?

A

receiver side lobe suppression; if the control video is stronger than the sum, the video is discarded.

26
Q

MSSR, if two aircraft have the same discrete 3/a code and one of them is real, what is the other?

A

false target

27
Q

MSSR, what comparison is made between difference and sum to determine the direction a target is from boresight?

A

phase; amplitude

28
Q

MSSR, what is the result between sum and difference if the aircraft is right of boresight?

A

the resultant difference port phase leads the resultant sum port phase by 90deg

29
Q

MSSR, what are the major components of the interrogator?

A

tx, rx, plot processor, and tracker

30
Q

MSSR, where are the transmit pulses developed?

A

the mode generator PEC

31
Q

MSSR, the lva antenna makes what three patterns?

A

sum, difference, and control

32
Q

MSSR, what information does the plot processor report contain?

A

the aircraft’s azimuth, range, mode 3/a code, and altitude

33
Q

MSSR, how long will the tracker remain in a coast state?

A

four scans.

34
Q

MSSR, what is the specialized test set used to maintain the monopulse beacon radar?

A

mbts II

35
Q

MSSR, what mbts module checks the performance of the test set itself?

A

BIT module

36
Q

STARS, what type of software is responsible for managing the computer hardware and all applications?

A

OS

37
Q

STARS, what are some of the hardware resources an operating system, such as UNIX, is responsible for managing?

A

CPU, main memory (RAM), secondary memory (disk, ROM), and peripheral devices.

38
Q

STARS, do any applications bypass the OS and access computer hardware resources directly? why?

A

no; because bypassing the os will cause a general protection fault.

39
Q

STARS, there are two main parts of unix os; which part controls the hardware resources? which part provides user interface?

A

the kernel; the shell

40
Q

STARS, what are the three levels of unix permissions?

A

user
group
other

41
Q

STARS, what are the three types of unix permissions?

A

read
write
execute

42
Q

Define STARS.

A

an open architecture, distributed software-based ATC automation system that is the replacement system for the DOD Rapcon and the FAA tracon air traffic control facilities.

43
Q

STARS, what are the three facility types in STARS?

A

SCSC
OSF
SOS

44
Q

STARS, the SCSC provides centralized control of what?

A

stars field support and hardware/software development

45
Q

STARS, what does STARS replace?

A 
pidp ii
dbrite
video mapper
arts
earts
ratcf-dair
micro-earts
46
Q

STARS, what does the sos receive from the ARTCC?

A

nas information, etms data, and interfacility flight data necessary for accurate aircraft tracking.

47
Q

STARS, what are the five roles TAS performs?

A 
radar data display
flight data interface and display
operator interaction
data recording
status monitoring and sys control
48
Q

STARS, how many different workstation does stars use? list them.

A

four.

mcw/tcw/tdw/gpw

49
Q

STARS, how many different lans does stars use with the two service levels? list them

A

four.

fsLANa, fsLANb, esLANa, esLANb

50
Q

STARS, how many different displays does STARS use? list them.

A

mcw/tcw/tdw/gpw/supplemental

51
Q

STARS, what size is the ddm monitor screen? what is the resolution?

A

size 19.6

52
Q

STARS, what size is the ddm monitor screen? what is the resolution?

A

size 19.6 x 19.6 inches

resolution 2048 x 2048

53
Q

STARS, how are operational adjustments and maintenance alignments made on the DDM?

A

by remote controller

54
Q

STARS, what is the purpose of the bold letter designators on the modules?

A

facilitate easy identification and troubleshooting

55
Q

STARS, where can you find the interface for all major inputs to the DDM?

A

The read panel.

RADar (9 decks)

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