Module 2

31問 • 2年前

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is a type of short-range radio navigation system for aircraft, enabling aircraft with a receiving unit to determine its position and stay on course by receiving radio signals transmitted by a network of fixed ground radio beacons.

Very High Frequency Omnidirectional Range (VOR)

VOR uses frequencies in the ____________ band from __________ (even first decimal)

very high frequency (VHF) 108.00 to 117.95 MHz

VOR uses a ________________ to send a highly directional signal that rotates clockwise horizontally (as seen from above) ___________ a second.

phased antenna array 30 times a second

Developed from earlier ________________ systems, the VOR was designed to provide _______ courses to and from the station

Visual Aural Radio Range (VAR) 360

__________ transmitters to fully solid-state units in the early _________.

Vacuum tube 1960s

A worldwide land-based network of "__________", known in the US as ___________ (below 18,000 ft (5,500 m) and "_________" (at and above 18,000 feet), was set up linking VORs

air highways ; Victor airways jet routes

As of ___________, many airports are replacing VOR and NDB approaches with __________ (GPS) approach procedures

2005 RNAV

it is the receiver doing all the "work"

NDB

it is the transmitter doing most of the work

VOR

tell where a transmitter is

NDB

Tells where the aircraft is

VOR

are usually in the KHz wavelengths

NDB

transmit in the MHz ranges

VOR

we also have beams radiating in all directions from a transmitter, but all the beams are the same

NDB

is a beacon that projects 360 separate radio beams

VOR

Aircraft equipment for VOR (5)

• VOR Receiver • VOR Antenna • CDI (Course Deviation Indicator) • RMI (Radio Magnetic Indicator) • HSI (Horizontal Situation Indicator)

It interprets the bearing in degrees to (or from) the VOR station where the signals are generated.

VOR Receiver

It decides whether or not the aircraft is flying toward the VOR or away from it.

VOR Receiver

is usually located on the tail, picks up this signal and transfers it to the receiver in the cockpit.

VOR Antenna

3 types of VOR navigational stations

VOR – just the VOR VOR-DME - VOR plus distance measuring equipment VORTAC - VOR plus the military's tactical air navigation system

VOR radials emanate _________ the station

FROM

Classification of VOR according to range

• T (Terminal VOR) • L (Low Altitude VOR) • H (High Altitude VOR)

From 1,000 feet above ground level (AGL) up to and including 12,000 feet AGL, at distances out to 25 NM.

T (Terminal VOR)

From 1,000 feet AGL up to and including 18,000 feet AGL at distances out to 40 NM.

L (Low Altitude VOR)

From 1,000 feet AGL up to and including 14,500 feet AGL at distances out to 40 NM. From 14,500 AGL up to and including 60,000 feet at distances out to 100 NM. From 18,000 feet AGL up to and including 45,000 feet AGL at distances to 130 NM.

H (High Altitude VOR)

is an avionics instrument used in aircraft navigation to determine an aircraft's lateral position in relation to a course to or from a radio navigation beacon. If the location of the aircraft is to the left of this course, the needle deflects to the right, and vice versa.

CDI (COURSE DEVIATION INDICATOR)

The ADF needle is yellow and the VOR needle is green. The VOR needle points to a VOR station and the tail of the needle indicates the current radial.

RMI - RADIO MAGNETIC INDICATOR

It combines a heading indicator with a VHF omnidirectional rangeinstrument

Horizontal Situation Indicator

VOR determines bearing information by comparing the phase angle between two signal. These two signal are called:

Reference Signal Variable Signal

• Omni directional continuous wave transmission on the stations allocated frequency • It carries the __________ identification and reference modulation • The signal is __________________

Reference Signal 9960Hz Frequency Modulated at 30Hz

• Directional signal transmitted on the stations allocated frequency • Rotates at _________ (Limacon) • The signal is apparently ___________

Variable Signal 1800 RPM Amplitude Modulated at 30Hz

MICROPROCESSOR MIDTERM MODULE 1

Annaricha Mae Dalag · 28問 · 2年前

MICROPROCESSOR MIDTERM MODULE 1