SURVEILLANCE

What is the maximum unambiguous range at PRF of 250 MHz?

600 km

What is ASTERIX Category 001?

Monoradar Target Reports

What is ASTERIX Category 008?

Monoradar-derived weather information

What is ASTERIX Category 010?

Monosensor surface movement data

What is ASTERIX Category 011?

Advanced Surface Movement Guidance and Control System (A-SMGCS) data.

What is ASTERIX Category 021?

ADS-B target reports

What is ASTERIX Category 023?

Ground Station Status and Service Messages

What is ASTERIX Category 034?

Radar Service and Monitoring Messages

What is ASTERIX Category 048?

Monoradar target reports and tracks.

What is ASTERIX Category 062?

System track data from a tracker

Meaning of 7500 Squawk Code?

Unlawful interference or hijacking.

Meaning of 7600 Squawk Code?

Radio failure or lost communications.

Meaning of 7700 Squawk Code?

General emergency

What is the Preamble Length

8 microseconds

What does the transponder do when P2 is greater than or equal to P1?

When the P₂ pulse is greater than or equal to the P₁ pulse (P₂ ≥ P₁), the transponder suppresses its reply and enters a temporary blackout period (inhibited state) lasting between 35 ± 10 microseconds

What is P2 pulse for?

Side Lobe Suppression

What is Level 1 Transponder?

Basic surveillance capability providing identity and altitude.

What is Level 2 Transponder?

Elementary Surveillance. The baseline standard for controlled airspace; automatically transmits the aircraft's unique 24-bit ICAO address, 4-digit squawk, callsign, and pressure altitude.

What is Level 3 Transponder?

Adds support for extended-length communication protocols (Comm C data links), handles uplink-only messaging.

What is Level 4 Transponder?

Adds support for extended-length communication protocols (Comm C and Comm D data links), where it handles full two-way uplink and downlink data-link capabilities.

What is Level 5 Transponder?

(Enhanced Surveillance / EHS): Builds on Level 4/EHS parameters to pull continuous Downlink Aircraft Parameters (DAPs) like selected altitude, magnetic heading, and indicated airspeed straight from the flight deck.

Elapsed Time …….

STC

What is DF0?

Short air-air surveillance (ACAS)

What is DF4?

Surveillance - Altitude reply

What is DF5?

Surveillance - identity reply

What is DF11?

Mode S all-call reply

What is DF16?

Long air-air surveillance (ACAS)

What is DF17?

Extended Squitter

What is DF18?

Extended Squitter/non transponder

What is DF19?

Military Extended Squitter

What is DF20?

Comm-B - Altitude reply

What is DF21?

Comm–B – identity reply

What is DF24?

Comm–D – Extended Length Message

What is UF0?

Short air–air surveillance (ACAS)

What is UF4?

Surveillance – altitude request

What is UF5?

Surveillance – identity request

What is UF11?

Mode S only all–call

What is UF16?

Long air–air surveillance (ACAS)

What is UF20?

Comm–A – altitude request

What is UF21?

Comm–A – identity request

What is UF24?

Comm–C – Extended Length Message

What is the minimum number of MLAT station?

4

Comm-B Data Selector (BDS) codes for ADS-B?

• BDS 05: Airborne position

• BDS 06: Surface position

• BDS 08: Identification and category

• BDS 09: Airborne velocity

• BDS 61: Aircraft status

• BDS 65: Operational status

Comm-B Data Selector (BDS) codes for Mode S Mode S Elementary Surveillance (ELS) ?

• BDS 10: Data link capability

• BDS 17: Common usage GICB capability

• BDS 20: Identification

• BDS 30: ACAS resolution advisory

Comm-B Data Selector (BDS) codes for Mode S Enhanced Surveillance (EHS)?

• BDS 40: Selected vertical intention

• BDS 50: Track and turn report

• BDS 60: Heading and speed report

Comm-B Data Selector (BDS) codes for Meteorological Routine Air Report (MRAR)?

• BDS 44: Meteorological routine air report

• BDS 45: Meteorological hazard report

What is BDS 05?

Airborne position

What is BDS 06?

Surface position

What is BDS 08?

Identification and category

What is BDS 09?

Airborne velocity

What is BDS 61?

Aircraft status

What is BDS 65?

Operational status

What is BDS 10?

Data link capability

What is BDS 17?

Common usage GICB capability

What is BDS 20?

Identification

What is BDS 30?

ACAS resolution advisory

What is BDS 40?

Selected vertical intention

What is BDS 50?

Track and turn report

What is BDS 60?

Heading and speed report

What is BDS 44?

Meteorological routine air report

What is BDS 45?

Meteorological hazard report