Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
45 Cards in this Set
- Front
- Back
What does Radar mean?
|
Radio Detection and Ranging
|
|
Who was Heinruch Hertz?
|
He basically created radar and showed that waves reflect by objects in 1888.
|
|
Who was marconi?
|
Credited for the radio invention in 1922.
|
|
Who worked for the Naval Research Lab and conducted experiments with Radar? What system did they use?
|
Leo Young and A. Hoyt Taylor. A continuous wave system and a receiver on the other side.
|
|
Who worked on Radar prior to WW2?
|
US, Germany and England.
|
|
What was the name of Englands Radar?
|
Chain Home to warn of German attacks.
|
|
What are the 2 types of Radar?
|
Continous Wave and Pulse Radar.
|
|
Early Radars consisted of what?
|
separate transmitters and receivers with individual antennas.
|
|
Modern radars consist of four compnents which are?
|
Transmitter, receiver, antennae and display/ radar scope.
|
|
How does radar operate?
|
By transmitting a high powered radio pulse and listening for its reflection.
|
|
What does a Transmitter do?
|
Creates the high power radio signal used to illuminate the target.
|
|
The transmitters rate of transmission is known as?
|
pulse repetition rate or pulse repetition frequency (PRF).1,000 pulses per second.
|
|
What does the Antennae do?
|
The antenna functions as both a transmitting and receiving device.
◦The antenna also gathers the faint echoes and directs them to the receiver via the waveguide |
|
Where does the waveguide termnate at?
|
The Feedhorn
|
|
What does the Receiver do?
|
Listens for any returning echos.
the radar system measures the time difference between transmission and reception and uses this calculation to determine the object’s distance from the antenna. ◦The farther away a target is the fainter the echo. |
|
What does the Display scope do?
|
It displays the targets also known as the Plan Positon indicator and the Main display monitor.
|
|
An object illuminated by the radar signal will do what?
|
reflect radar energy and show up as a blip on the screen.
|
|
What is blocked out on the screen?
|
Ground clutter
|
|
Low intensity echoes are known as?
|
History
|
|
What is Receiver Gain used for?
|
to amplify desired targets and reduce unwanted targets.
ATC Radar receivers have a fixed threshold |
|
Whats the Moving Target Indicator used for?
|
MTI uses phase-filtering techniques to eliminate targets that are not moving.
◦Also reduces target strength. ◦MTI Gate: Can vary the range of processing |
|
Whats the Sensitivity Time Control used for?
|
Basically controls the intensity of all targets
|
|
Circular Polarization Control (CP) does what?
|
Removes most unwanted precipitation returns.
◦Also reduces legitimate targets. |
|
Name 2 radar sytem control knobs?
|
Range Select
◦Range Marks |
|
Precision Approach Radar (PAR) is?
|
Used by DOD as a precision landing aid.
◦Slowly being phased out |
|
Airport Surveillance Radar (ASR) is?
|
◦Short-range radar
|
|
Air Route Surveillance Radar (ARSR) is?
|
Long Term Range radar. 250nm+
|
|
Air Route Surveillance Radar (ARSR) is?
|
Used at Airports when surface visibility is bad.
|
|
Primary Radar returns from?
|
the reflected echo. The blip.
|
|
Secondary radar returns from?
|
The transponder.
|
|
Air Traffic Control Beacon System is known as?
|
Known as Secondary Radar.
Introduced in 1956. Originally developed by the military to sort out bad guys from good guys. |
|
All IFF and Beacon systems use a what system?
|
“challenge and response” system.
|
|
Transponder codes use a what type numbering system?
|
octoral from 0-7. Also its a 4 digit code selected by the pilot.
|
|
How many transponder codes exist?
|
4096
|
|
What is the TPX-42
|
Originally a military beacon decoder system.
◦Allowed the “Squawk Code” to be displayed next to the secondary radar target |
|
Non-discrete codes end in
|
00 like 1200. All other codes are discrete.
|
|
Give preference to the use of
|
discrete codes.
The computer issues discrete codes. |
|
Squawk Standby is used for?
|
Turns the beacon off but unit stays on.
◦Used to reduce clutter. ◦Used to identify an aircraft. |
|
computer radar sytems were introduced as?
|
part of "Project Beacon"
|
|
3 sytems that were developed were the?
|
Flight Data Processing(FDP) assigned to ARTCCs
2.Radar Data Processing(RDP) for ARTCCs 3.Automated Radar Terminal System (ARTS) |
|
What is a target?
|
symbol showing aircraft beacon or primary, usually a slash, dot, or x.
|
|
What is a Position symbol?
|
symbol over the target attached by a line to the data block.
|
|
If position symbol falls more than one history behind the target, or there is no target symbol, don’t use?
|
Mode C
|
|
What is ARTS? How many are there?
|
Automated Terminal Radar System. Provided Radar and Beacon tracking. 4 types
|
|
What is Stars?
|
Standard Terminal Automation Replacement System.joint FAA and DoD program to replace ARTS and other capacity-constrained, older technology systems at 172 FAA and up to 199 DoD terminal radar approach control facilities and associated towers.
44 |