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13

ADS-B is part of a system that compromises a number of different things. ADS-B (In) means that your aircraft is capable of receiving the ADS-B data, FIS-B and TIS-B as well. FIS-B broadcasts information such as weather. TIS-B is a traffic broadcast system. ADS-B includes a number of messages (about 27 different messages), including: Aircraft Identification ...


13

No, a drone will normally not be visible on an aircraft TCAS. The TCAS system is based entirely on direct communication between aircraft transponders, so both parties (aircraft and drone) must have a transponder in order for TCAS to work. Normal drones do not have transponders, so they will not be visible on TCAS. If a pilot reports a drone near the ...


4

TCAS is based on aircraft transponders, so unless the drone has one installed it cannot be seen by TCAS. At least no commercial drones intended for consumers have transponders installed. On the other hand drones are not allowed in airspaces used by airliners so there should not be a need for one.


4

At least under FAA regulations the TCAS system goes into standby (by design) if the transponder fails A Mode S transponder is required to be installed and operational for TCAS II to be operational. If the Mode S transponder fails, the TCAS Performance Monitor will detect this failure and automatically place TCAS into Standby. The Mode S transponder ...


3

It's already been said TCAS is not a radar, but how come it knows the bearing, and how does it work with the different transponder types? Radar A basic ground secondary surveillance radar sends an interrogation signal as it sweeps the sky, and the transponders in the direction of sending reply. TCAS A TCAS system is similar, by having an on board ...


2

It depends a bit on speed but your linked article has the answer Traffic advisories are provided 35-48 seconds out and a Resolution will be provided 20-30 seconds out. Since the resolution is coordinated you only need enough time to clear the other aircraft however the greater separation the safer it will be so its advised to respond immediately upon a ...


2

The only time it would make sense as a normal or abnormal procedure to turn off altitude reporting is when your static encoder system is reporting no or incorrect altitude information. Especially in today’s world of mandatory Mode C and/or ADS-b in certain airspaces. ATC in those airspaces may have you cycle your system temporarily. Or, they could have you ...


2

From Mode-S.org An ADS-B message is 112 bits long: +--------+--------+-----------+--------------------------+---------+ | DF 5 | ** 3 | ICAO 24 | DATA 56 | PI 24 | +--------+--------+-----------+--------------------------+---------+ DF is the downlink format, ICAO is the 24-bit ICAO identifier of the aircraft, DATA is the message ...


1

The display depends on the equipment used. For example, the Avidyne 540 Pilot Guide says this: For Mode-S equipped aircraft, the aircraft ID (e.g. tail number, call sign, etc) may also be displayed adjacent to the traffic symbol. Normally I see a solid white diamond with a dotted line leading away to indicate direction, + or - how many hundreds of ...


1

The directionality of a TCAS antenna is ONLY used for positioning the bogey on the TCAS display, it is NOT used for determining time-to-contact. So you're still going to get TAs and RAs from the Omni antenna even if the upper antenna is blanked, but you won't get the display of that traffic.


1

Theoretically it can be done; a radome is an antenna enclosure for a radar. It is designed to have sufficient permittivity at the frequencies of interest. For TCAS, you need to look for 1030 MHz and 1090 MHz (IEEE L-Band). Marker beacons work at 75 MHz (VHF) It is very important to make sure the TCAS antenna has good line-of-sight to all directions. If not,...


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