Karteikarten
10. SSR
Karten in diesem Stapel (93)
- 1SSRsecondary surveillance radar
- 2what does the SSR consist ofa primary and secondary radar
- 3what does the secondary radar doeffectively asks question
who
altitude
and waits for a reply - 4which altitude is communicatedpressure altitude
- 5what does the SSR consist ofTrace trend
ident flight level - 6which part is responsible for the trace trendthe primary radar
- 7which part is responsible for the ident flight levelthe secondary radar
- 8how is speed givennot given but can be determined
- 9which speedground speed
- 10which radar is more reliable when it comes to bearing and distancethe primary radar
- 11What is a secondary radar based oninterrogator/transponder system
- 12MODE AAircrafts ident
- 13MODE Cflight level
- 14what modes and therefore basic informatino is provided by a basic SSRMODE A (AC ident)
MODE C (FL) - 15what frequencies are usedG to AC 1030 MHz
AC to G 1090 Mhz - 16describe P1 and P3the time interval between P1 and P3 determines the TYPE of interrogation
- 17what is the time period associated with MODE A8 microseconds
- 18what is the time period associated with MODE C21 microseconds
- 19what can you say about P2 and the direction of transmissionit is omnidirectional
- 20when is P2 sent2 microseconds after P1
- 21what does the side lobe suppression depend onthe amplitude of P2
- 22describe side lobe suppressionif the P2's amplitude is LESS than P1s (main lobe) - the ACs transponder will answer
if the amplitude of P2 is MORE than P1 (in case of side lobes), the ACs transponder will not answer - 23describe a MODE A / MODE C reply2 frame pulses F1 and F2 are 20.3 microseconds apart framing 12 pulses that can be transmitted or suppressed to from a binary code
- 24what is a SQUAWK codeone of the 4069 available codes allocated to the ATC to identify the AC
- 25what are the 3 special A codes7500
7700
7600 - 267500Hi jack - Unlawful interference
- 277600Radio communications Failure
- 287700emergency/distress
- 29What is Squawk charlieautomatic transmission of the AC flight level rounded to the nearest 100 ft (100 ft increments)
- 30what is displayed on the ATC scopeAC flight level (received data) or altitude (calculated from inserted QNH) rounded to the nearest 100 ft
- 31what is the reply accuracy300 ft required by regulation
- 32how is the A code displayeda sequence of 4 digits from 0-7 (2^3) for a total of 4096 available codes (2^12)
- 33what are the different selector modes (5)OFF
STBY
ON
ALT
TEST - 34OFFsystem not powered
- 35STBYsystem powered by not replying
- 36ONsystem replying MODE A interrogations only
- 37ALTsystem replying to mode A and C interrogations
- 38TESTself check of the system
- 39describe the SQUAWK ident Procedureon ATC request
pilot presses ident button
a SPI is transmitted after F2 for 20 seconds - 40what is the ident used forto help ATC identify AC on their scope
acknowledge clearance in case of radio communication failure - 41define garblingsuperimposition of 2 AC answers making both unreadable.
- 42when can garbling occurwhen 2 aircraft are in the same direction and spaced less than 1.7 nm apart (slant range)
- 43FRUITfalse replies unsynchronised to interrogator transmissions
- 44when does fruiting occurwhen the receiver catches replies from other SSR
- 45Define ghost targetsechoes misplaced on the ATC scope due to multipath
- 46how long is the pulse itself0.8 microseconds
- 47what is the relative amount of power in the main beam compared to the sidelobesmore power in the main beam compared to the sidelobes
- 48Mode C - how many pulses12 pulses
- 49what is the datum used for mode C1013.2 mb
- 50what is the max height available in MODE C128000ft
- 51what is the minimum height that can be sent by the transponder-1000 ft
- 52what mode can you not havejust Mode C
MODES include : A
A/C - 53when will STBY be usedfor a change in digits/codes
- 54what are the main advantages of the SSR-longish range
-no clutter or unwanted echos from building
-reply gives lots of information
- little effort required from pilot
no manoeuvres required
reduced communications
less power required - 55how many dimensions does garbling happen in3 dimensions, all directions
- 56interrogations can be described as whatdirectional
- 57answer can be described as whatomnidirectional
- 58what are the other disadvantages associated with SSRfuselage shielding antenna
only 4096 codes available - 59how many S codes are theremore than 16 000 000 - 24 bits
- 60what is different about the Mode S interrogatortransmits and identifier code
- 61ICidentifier code
- 62what is the altitude increment of mode s25 ft
- 63define a TCAS squitterbroadcast transmission containing the AC address
- 64what is the all-call modefor capturing new S mode traffic in the area
- 65what is the broadcast modetransmission of information to all mode S transponders, no replies
- 66what is the Selective modefor interrogating a single AC, used most commonly
- 67selective mode can also be called whatroll call mode
mode period - 68what are the two different types of Intermodesmode A/C/S all-call
mode A/C only all call - 69describe A/C/S all callto elicit responses from A/C mode transponders, and for acquisition of new S mode transponders (long P4)
- 70describe A/C only all callelicit replies of mode A/C transponders. Mode S transponders do not reply (short P4)
- 71describe mode S interrogationsdata pulse P6 with internal phase modulation
- 72what is the control pulse P used asa side lobe suppressor
- 73describe mode S repliesconsists of preamble and a data BLOCK
- 74how many possible forms does the reply message have25 possible forms
- 75what is provided to the ATCposition
Altitude
Ident - 76what is the surveillance identifier code capacityautomatic reporting of aircraft identification, as specified in ICAO flight plan item 7, known as ICAO level 2's
- 77when is the operation with antenna diversity mandatorymaximum mass is above 5.7 tonnes
maximum cruising speed is above 250 kts - 78what is the protocol is elementary service based onground initiated Comm-B protocol
- 79what does enhanced surveillance consist ofextraction of additional parameters
- 80what are these additional parameters known asdownlink aircraft parameters
- 81what are the main benefits of the enhanced surveillancebetter SA for ATC
reduced Rx/Tx workload
reduced pilot and ATC workload
removal of potential sources of error - 82what is P5the control pulse or the pulse modulation
- 83which mode has additional pulsesIntermode
- 84what is used for mode S interrogationsDPSK
- 85DPSKdifferential phase shift keying
- 86what is an advantage of DPSK-spread spectrum so immune to interference
-no interference to mode A/C - coexsist
- allows up to 4 MBs of data - 87what can elementary surveillance be split up intominimum surveillance functionality
downlink aircraft parameters - 88what are the Mode S comms protocolsComm A - Comm B
Comm C - Comm D - 89Comm Ashort interrogation (question)
- 90Comm Bshort (elementary surveillance) reply
- 91Comm Clong interrogation (extended length)
(question) - 92Comm Dreply - long (extended length)
- 93what different information can be provided by the enhanced surveillanceRoll angle
VS
IAS
Mach no
GS
Track Angle
Informationen
- Beschreibung
- RNAV Karteikarten am 10. SSR, erstellt von Ella Davies am 19/05/2018.
- Erstellt von
- Ella Davies · Mai 2018
- Aktualisiert
- 20 Mai 2018
- Aufrufe
- 2
- Bewertung
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