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Questions tagged [ads-b]

ADS-B (Automatic Dependent Surveillance - Broadcast) is a surveillance technology that works by broadcasting GNSS position, velocity and identity to interested parties. It can be used as a supplement to or alternative to radar systems for tracking aircraft. It is a component of the FAA's NextGen ATC improvements, as well as the European SESAR programme.

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149 views

What is the difference between ACARS and ADS-B?

What is the difference between ACARS and ADS-B? For weather information in-flight or pre-flight which one is used?
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Do ferry flights to the US that are not ADS-B Out equipped require a special ferry permit from 1 Jan 2020?

The aircraft is not compliant with ADS-B Out DO 260B and will be parked in Arizona after return. Can this aircraft fly to the State for ferry flight only to US without ADS-B Out DO 260B? Should I ...
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What is the relationship between ADS-B IN/OUT and different mode transponders?

What is the relationship between ADS-B IN/OUT system and different mode transponders? Can a aircraft with mode A or C transponder have the ADS-B in/out capability, that is getting more detailed ...
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120 views

How could I match the surrounding traffics displayed with their radio communication

If I have a traffic display I could see the traffics in proximity of my aircraft and meanwhile I could listen to their voice communication. So how could I match the traffic shown in the display with ...
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115 views

Is there any current and/or upcoming technology that alerts Air Traffic Controllers in case of loss of aircraft separation?

Currently doing an assignment and it to analyse an accident where older atc systems could have been at fault. In 1995 there was an incident where two aircraft came closer than the then current ...
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NEXRAD—why is it 2D?

If you paid attention to NEXRAD training, you know that the colors of pixels show the maximum activity at any altitude in that air column. (It’s a “composite” view.) NEXRAD itself samples in three ...
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On an ADS-B In display, do the pilots see the squawk code or call sign for other aircraft?

If I understand correctly, with a ADS-B In equipment or TCAS equipment on board, the pilots could see the surrounding traffic with its assigned squawk code like "4653", is that right? But could the ...
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105 views

What kind of input is used by NASA's TASAR?

I've found the Aviation SE to be a really interesting read so far, I'm excited to be here! I'm fairly new, but I'm also old! What are the inputs for TASAR to crunch flight path optimization? Is it ...
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86 views

What additional airspace will be off-limits to an a/c w/ no elect. system or xponder under 91.225 (ADS-B) compared to under 91.215?

Under FAR 91.225 (requirement for ADS-B-out), what additional airspace over the 48 contiguous states in the U.S. will be off-limits to an aircraft w/ no electrical system or transponder, compared to ...
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A question about FAR 91.225(e)(2) — pertains to ADS-B-out requirement and exemption for aircraft with no electrical system

This is a question about FAR 91.225 (requirement for ADS-B-out) and where aircraft with no electrical system will be able to fly. FAR 91.225 exempts aircraft with no electrical system from many of ...
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159 views

Can ADS-B used for voice communications?

Everyone knows the radio communications doesnt sound great altough they work perfectly. But can the brand new ADS-B communications be used for carrying audio signal? Would it be clearer? The ADS-B ...
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How to know which data came from Mode S and which came from ADS-B (FIS-B)?

I'm dealing with recorded ADS-B data as a part of my thesis (programming-oriented). I have a table of ADS-B communication of an aircraft (image below) - I know, that some of these recorded data in ...
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132 views

What benefits does Automatic Dependent Surveillance bring to continental ATC over Mode S?

In particular, to the extent that there are mandates for it in USA and Europe? I checked various posts here and official descriptions (e.g., faa.gov), but I can't figure out the following: For ...
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348 views

When is squawk 1000 assigned in USA?

From Are squawk codes used with ADS-B?: Yes, squawk codes are still used and required with ADS-B. The post is 3 years old though. And from Wikipedia List of transponder codes: 1000: Used ...
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94 views

Getting data from Existing ADSB Receivers

Is there any way to get data from existing ADSB receivers installed around the world?
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394 views

When will the Canadian ADS-B satellite system be implemented?

It is interesting that ADS-B is not mandated in Canada as of yet. If you fly in the US you quickly realize the benefits. Now as I understand it Nav Canada is the largest shareholder in Iridum but ADS-...
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187 views

Received ADS-B TC=31 message with non-existent version 3?

On several dates, my ground station received some airborne operational status ADS-B messages (TC=31) where the version number was reported as 3. As far as I know, ...
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TIS-B anonymous address

I could not understand what is the difference between ADS-R with anonymous address (CF=6, IMF=1) and TIS-B CF=5, which on ICAO Doc 9871 is described, for Version 1 as: Fine TIS-B Message AA field ...
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102 views

Will a non-certified GPS source work the same in ADS-B mandated airspace?

What happens if you use a non-WAAS GPS position source in ADS-B mandated airspace? Doesn't it work the same, except for the positional accuracy?
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386 views

How can I use an ADS-B receiver to make my aircraft visible in Flightradar24?

I recently bought a SENTRY ADS-B receiver for the aircraft in order to track the flight. How could I make Flightradar24 or Flightaware show my aircraft and how to register my aircraft on the website?
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What is the current state of the practice regarding surveillance and surveillance data integrity?

I am experiencing difficulties in finding out exactly how air traffic surveillance works in practice, and more specifically what is done to verify the integrity of surveillance data. ADS-B and other ...
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Does the 2020 ADS-B -Out requirement apply to aircraft with only a wind-driven generator (electrical system)?

Since my J3 Cub was was not originally certificated with an engine-driven electrical system it's clear the 2020 ADS-B-Out mandate (U.S.) does not apply (except where specifically noted in FAR part 91)....
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Why do I missing 1090 Rebroadcast Traffic (ADS-R) Targets from Ground Station as part of 978 Uplink?

For context I have an ADS-B 1090 OUT and 978 IN. I also have a Stratus portable Dual channel receiver in my plane, so I have the option of comparing the traffic between systems. What I’ve been ...
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301 views

What are the radius of containment (Rc) and horizontal protection limit (HPL) and how are they related to Type Code?

In ICAO Document 9871 (Technical Provisions for Mode S Services and Extended Squitter) page 30 they have mentioned it in the form of a table. But they haven't explained HPL and Rc in detail.
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261 views

What is the difference between ICAO and non-ICAO flight address?

In document 260B, "Minimum operational performance standards for 1090Mhz Extended Squitter", on page 47 of the pdf, in the DF18 format they have mentioned for a particular CF(code format), "non-ICAO ...
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517 views

What accuracy is required in todays ADS-B position reporting?

I would like to know what accuracy is required for ADS-B position reporting. For example, mobile phones A-GPS capable have 10 meter position error with perfect conditions. Is this similar with ADS-...
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884 views

Why doesn't ADS-B use satcoms like ADS-C?

With ADS-C, in the middle of remote areas (like ocean), we can send position report via satellite data link. So, why ADS-B systems on airplane uses ground based stations (VHF datalink) rather than ...
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328 views

ADS-B receiver, dongle vs SBS-3 or Garmin

Is there any differences between FlightAware Pro Stick USB and Kinetic SBS-3 or Garmin for aircraft tracking purpose? Something like: SBS-3 can receive twice more data.. is there any benefits? Assume, ...
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403 views

What is the unit for ground speed reported by ADS-B?

Strangely enough, I'm having trouble finding the unit reported by ADS-B on the Internet. Many sites simply refer to it as "ground speed". Is it measured in KPH?
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Can an ADS-B In/Out equipped aircraft increase ground station coverage? [duplicate]

Suppose a ground station can detect aircraft in a 200 km radius with ADS-B In. There is a plane A at 180 km, and another one B at 250 km, both equipped with ADS-B In/Out. If ground station receives A,...
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320 views

How to know that ADS-B position messages are not spaced more then the 1/2 zone limit?

I am doing some ADS-B compact position reporting (CPR) decoding at the moment and one of the things that is described is; "1/2 zone limit" from the last successfully decoded message. I understand ...
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531 views

Does TCAS II equipment satisfy the required ADS-B installation?

The title says it all. If TCAS II is installed and functioning, does it satisfy the ADS-B OUT mandates?
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980 views

Where are US FIS-B UAT ground facilities located?

In the US there are Flight Information Services Broadcast (FIS-B) transmitters strategically located to provide WX, NOTAMS and other flight information utilizing the ADS-B infrastructure. ADS-B has ...
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559 views

Why does ADS-B broadcast velocity?

I just read on opensky-network (scroll down to the section "facts") that ADS-B transmits roughly as many velocity as position messages. Since the velocity of an aircraft can be computed from two ...
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378 views

Has anyone been able to verify ADS-B works without radar?

I know that one of the biggest advantages of ADS-B is "supposed" to be that it will directly communicate between equipped aircraft without ground support. Has anyone actually seen that in action? That ...
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512 views

How do ADS-B and ADS-C get used on transoceanic flights?

I have three questions regarding ADS-B and ADS-C. (Hopefully you don't feel my questions are not related.) (1) What's the scope of availability of ADS-B? Let's say an airliner equipped with all the ...
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339 views

Is ADS-B UAT required below 18,000 ft for ADS-B ES equipped aircraft?

If an aircraft is flying in the USA with 1090 MHz Extended Squitter (ES) and it is below 18,000 feet, does it then need to also have 978 MHZ Universal Access Transceiver (UAT) so that aircraft flying ...
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579 views

How to extract the interrogator ID from a DF11 message?

I've written a class which decodes raw Mode S messages. Whilst browsing the ICAO specs the other day I noticed that the Interrogator ID is sent back in the DF11 message. I thought that it would be a ...
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1k views

How do military fighter aircraft identify themselves and each other?

I live in an area where there is much NATO military activity. Often there are various fighter aircraft fly-overs. But none of the common websites such as flightradar24, flightaware and ...
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718 views

Are there any simulators around to simulate ADS-B data (TIS-B & FIS-B)?

I am trying to find a simulator like the Spirent GPS Simulators. Are there any Simulators out there which can simulate and generate random traffic and weather information for TIS-B & FIS-B testing?...
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What's required for the ADS-B to function? A GPS or Mode S Transponder?

Jeppesen defines the ADS-B as a surveillance system broadcasting GPS-derived positions and other information such as velocity over the data link. Yet, the Wiki article on ADS-B relates it to the Mode ...
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982 views

How can I tell if an aircraft (N-number) is already equipped with an ADS-B transponder?

Is there any database that contains this information? This question asked how many aircraft already have one. Here I am asking how can I get which contain it.
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224 views

Center Controller with ADS-B question [closed]

I don't know anything about planes (mechanics,electroinics,etc...) so bare with me (and the long post)! In the USA With ADS-B coming due in a few years, more GA are implementing their planes with ...
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183 views

Can repeated call-signs be present in one day?

I am working with a big ADS-B traffic sample of one day Europe, and identified repeated call signs. Examples include: Flight that ends in an airport and repeated call sign starts from there. Two ...
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530 views

Do carriers such as Janet Airlines carry ADS-B transponders?

I was doing some casual browsing and came across some videos related to Janet Airlines. This is something I remember hearing of many years ago but this happened to jog my memory. What jurisdiction ...
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Is it recommended to have an ADS-B transponder in ALT mode on the ground? [duplicate]

Early on in training I was told that unless the airport specifically noted it on the chart, that the transponder was turned to ALT (altitude) mode just prior to taking the runway for take-off (lights, ...
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178 views

Should ADS-B airborne and surface squitter transponder registers both be updated regards air/ground status?

ADS-B have two position squitters, airborne and surface. As far as i know, airborne position is broadcasted on air and surface position broadcasted on ground. There is a "Squitter Capability Subfield"...
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235 views

What does “maximum update interval” mean for Mode S GICB registers?

Transponders have registers for Mode S data and configuration. These registers are updated periodically to provide Mode S services such as ADS-B Airborne Position squitter. DO-260B and similar ...
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509 views

How does FlightAware correlate flights to Part 91 flight plan data?

I'm looking at some flights in FlightAware. With the scheduled air carrier flights, their call-sign can be crossreferenced with a flight schedule database to determine the origin and destination. How ...
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Can ADS-B DF-17 messages with a non-zero remainder after CRC check be used?

For fun I've been using an AirSPy SDR (Software Defined Radio) to receive and decode ADS-B packets, primarily DF-11 and DF-17 messages. The code is written in C++ and works reasonably well. It ...