Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ASYS 310 > MOD 1 2 3 > Flashcards

MOD 1 2 3 Flashcards

1
Q

What is repeatability?

A

A method of expressing the accuracy of a navigation system, the ability of the user to return to the same location using the same methods

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How many pulses does the MASTER station have?

A

9 pulses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How many pulses do the SECONDARY stations have?

A

8 pulses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the carrier wave pulses tuned to?

A

100kHz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What pulses has the maximum power in a burst?

A

the 8th pulse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The receiver measures the _________ between the master and the secondary stations

A

difference

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The difference in distance between 2 stations creates what kinds of lines of position?

A

hyperbolic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The time between each master station transmission is called __________

A

group repetition interval (GRI)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What pulse is the principal timing point (timing reference) for a LORAN pulse?

A

The 3rd pulse because there is no sky wave contamination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How long is each pulse?

A

Each pulse is 270uS in duration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How much time is between pulses?

A

1mS, but for the master the last 2 are 2mS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

An imaginary line drawn between the master and each secondary

A

Baseline

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The coverage of a LORAN chain is determined by

A

Power transmitted, distance between, and geometry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is needed in order to determine a position fix?

A

2 intersecting lines of position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Whats the typical range coverage of a LORAN chain?

A

1200 - 1900km

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What can be determined by the LORAN data?

A

Positional latitude and longitude
Flight plan and route info
status of loran chain
course left/right info

17
Q

What frequencies does the ADF operate on?

A

190kHz to 1750kHz

18
Q

What kind of wave propagation does ADF use?

A

Ground wave

19
Q

Loop antenna utilizes the _______ field of the wave

Sense antenna utlizes the _______ field of the wave

A

Magnetic field

Electrostatic field

20
Q

What does ADF give direction to?

A

Relative bearing to a non directional beacon (NDB)

21
Q

7 limitations for ADF

A 
Electrical Interference (electronics within aircraft)
Natural interference (lightning storms) (p-stat)
Night effect (Shape of ionosphere changes the wave propagation)
Coastal effect (lakes and oceans near a coast)
Attitude Error (banking could block antenna)
Quadrantal error (caused by physical shape of aircraft)
22
Q

the pattern of the loop and sense together is a

A

cardioid pattern

23
Q

what is a goniometer and what does it do?

A

A resolver made up of coils / windings (sin and cos), and the rotor winding will have a signal of 2 nulls, determining a LOP

24
Q

What does the balanced modulator produce?

A

Only the sum and difference frequencies and switches the phase at a rate equal to the servo reference frequency

25
Q

What does the 90 degree phase shift network do?

A

Phase shifts the signal by 90 degrees. Compares the output from the loop with the sense. Eventually makes it in phase with the sense, or 180 degrees out of phase

26
Q

The goal of the goniometer is to point towards what?

A

One of the 2 nulls, which will tell the servo motor to stop rotating the winding

27
Q

What does the loop amp do?

A

Amplifies the loop antenna signal

28
Q

The loop amp / 90 degree phase / balanced mod lead to what?

A

The RF amp

29
Q

What does the RF amp do?

A

It amplifies the signal from the goniometer (loop antenna) and the sense antenna. In phase = large amplitude signal, out of phase = small amplitude signal

30
Q

What does the servo amp compare?

A

If the signal is in phase or out of phase with the servo reference frequency, determining CW or CCW rotation of the motor in the goniometer

31
Q

Difference between closed loop vs open loop?

A

Open loop has no feedback from the indicator / receiver back to the antenna
Open loop uses a phase detector or coherent detector

32
Q

When testing an ADF with an antenna box, it is useful to know the _________

A

Room factor

33
Q

If sense is weaker than loop, it will result in a ________

A

deadspot

34
Q

If sense is stronger than loop , it will result in a _________

A

confused needle

35
Q

Frequency range for VOR is

A

between 108.00MHz to 117.95MHz

36
Q

Propagation for VOR is

A

Space wave or direct wave

37
Q

Range for localizer (ILS) is

A

108.10MHz to 111.95MHz

38
Q

Name of ground station for VOR and DME

A

VORTAC

39
Q

VOR is usually a ________polarized and mounted where?

A

Horizontally polarized mounted on the vertical stablizer

ASYS 310 (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions