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Aircraft don't seem to be updating.. why?
A: Are you running Internet Explorer? If so, go into Tools, Internet Options, General, Browsing History, and ensure "Every time I visit the webpage" is ticked.
What's the deal with seeing 'Nil Data' in the Flight Data, and Tooltips?
A: If information about an aircraft isn't available at the time of plotting, the corresponding field will be 'Nil Data'. Example, if an aircraft doesn't transmit a Squawk code then the field will be left as 'Nil Data'. Also in the case where an aircraft is received but no database records exist, then data such as routes, Airline, Aircraft Type, and Registration will be unavailable and therefore display as 'Nil Data'.
How long does it take for an aircraft to time out and disappear from the map?
A: Aircraft information is transmitted in multiple messages. Some messages may contain information such as Callsign and nothing else, and others carry the latitude and longitude. If any messages are received for an aircraft, whether they contain location information or not, they will stay on the map. When no data has been received for about a minute, then the aircraft will disappear from the map a short time afterwards.
What does 'HOME' mean on the Aircraft List?
A: When you click on HOME, it resets the map to the default map location which is centered on Waterford West, QLD. It also stops tracking specific aircraft.
Where is the receiver located?
A: The receiver is located at my home in Waterford West, QLD, Australia.
What is the Distance field based on?
A: The Distance field in the Flight Data section is based on the location of the receiver which is located in Waterford West, QLD.
Sometimes when I click on an aircraft the map changes but the flight information in the tooltip is incorrect. Why?
A: This is a known bug. Normally Google Maps will pan to a new location. If the new location is too distant, the map will just load new tiles. While I'm able to fix this, I've chosen not to for other technical reasons. The problem will fix itself when it next updates the data. This should be within 10 seconds. You can also move your mouse over the aircraft icon to force a new aircraft tooltip.
How often does the Flight Data get updated?
A: Currently this is set to every 10 seconds.
If I see 'Nil Data' (missing information) and I know what the information is, can I email you?
A: By all means. I want to go through the database and update it with more up to date information so if you can supply any, i'd love to hear from you. Just use the 'Contact us' to email me.
Why do aircraft tend to stop and/or disappear often on the map?
A: I live in a house located around 40km from Brisbane Airport. Since the house is low to the ground, the signal coverage can vary greatly depending on trees, and line of site to the aircraft. If the antenna located on the roof looses visible site of the aircraft the signal can be lost.
Do you have a polar diagram of your signal coverage?
A: Yes, see below.
What do the up, down, and right arrows mean on the aircraft tooltip?
A: The arrows indicate the vertical rate status. Up arrow means the aircraft is ascending, down arrow means it's descending, and the right arrow means it's level.
What are all the numbers and letters on the aircraft tooltip mean?
A: To the left of the brackets is the aircraft ModeS assignment or callsign (If received from the aircraft). Inside the brackets are the aircraft registration. On the bottom part of the tooltip from left to right is the Track, Groundspeed, Altitude and the arrow indicates whether the aircraft is ascending, descending or flying level. Finally on the last line is the squawk code. This is the 4 digit transponder code transmitted by the aircraft to assist air traffic controllers in traffic separation.
A: This site serves google ads which in turn may use technology to track the patterns of behaviour of visitors to the site. This can include using a "cookie" which would be stored in your browser. You can modify your browser to prevent this from happening should you chose to do so.
What happens if an aircraft transmits an emergency squawk code?
A: In the event an aircraft transmits a squawk code of 7500, 7600, or 7700, the code will flash in the Flight Data window (Only if you are tracking that aircraft).
Why don't I see any aircraft. It keeps saying 'No visible aircraft'?
A: Since Brisbane Airport doesn't operate a curfew, it's possible the site may be down. Feel free to email me to alert me to the situation. It's also possible there are no aircraft currently being picked up by my receiver.
Sometimes I see an aircraft in virtually the same position as another. Why is that?
A: When an aircraft signal is lost, the aircraft will still appear on the map for approximately 1 minute. The aircraft will also continue to stay on the map if messages are received but none of the messages contain updated Latitude and Longitude information.
Occasionally routes for an aircraft appear to be incorrect. Why?
Aircraft routes are not transmitted by the aircraft, but rather looked up in a database. Sometimes the data in the database can be out of date.
What information is transmitted by the aircraft?
A: Latitude, Longitude, Altitude, Groundspeed, Track, Squawk, Callsign, ModeS, and Vertical Rate.
What information is looked up in a database?
A: Airline, Aircraft Type, Registration, and route information. This information can be out of date. If you know of any information that is out of date, please let me know so I can correct it.
How can you work out the Flight Number of an aircraft?
A: While there is no hard and fast rule for doing so, you can usually make an educated guess by looking at the Callsign (if received by the aircraft). The first few letters of a callsign is an identifier of the airline. The numbers are usually representative of the Flight number. Example, If you see QFA6 as a callsign, the Flight number is Qantas flight 6. A callsign of JST456 would be Jetstar flight 456 etc.
What are the airlines associated with the callsign letters?
A: There are too many to list but the more common ones you’ll see on this site are:
What are the emergency Squawk codes?
Emergency squawk codes are as follows
Sometimes I see an aircraft located somewhere thousands of kilometres away. Is this even possible?
A: No, the frequency used by ADS-B is 1090Mhz which is line of sight. In the best of circumstances you would expect to pick up an aircraft at most around 400 kilometres away, however, in my case it's closer to 250km away. The Latitude and Longitude is transmitted from the aircraft and is decoded by the receiver. While it doesn't happen often, occasionally aircraft will transmit incorrect information. This is particularly evident when you see an aircraft jumping thousands of kilometres in only a matter of seconds.
40,ID,,11,114,400516,329,2006/04/12,15:25:55,2006/04/12,15:25:55,SHT2908 41,AIR,,11,654,4008B1,331,2006/04/12,15:26:25,2006/04/12,15:26:25 42,SEL,,11,1391,4CA258,304,2006/04/12,15:26:25,2006/04/12,15:26:25,RYR633 43,MSG,3,11,1391,4CA258,304,2006/04/12,15:21:38,2006/04/12,15:26:39,,17675,,,0,0,,,0,0,0,0 44,MSG,3,11,1391,4CA258,304,2006/04/12,15:21:39,2006/04/12,15:26:39,,17650,,,0,0,,,0,0,0,0 45,MSG,4,11,1391,4CA258,304,2006/04/12,15:21:39,2006/04/12,15:26:39,,,338.053250243212,324.147080384875,,,-2048,,,,,
Webmaster: Geoff Leff Email : I'm always endevouring to keep the database information up to date. Feel free to contact me with any corrections you can provide. Please supply the source if available.
|2-Dec-12||I've just moved to my new house in Waterford West, QLD. and relocated the antenna. The site is now back up.|
|1-Aug-12||The site has now been converted to Google Maps API v3 and is currently in testing stage.|
|19-Jul-12||I now have the BNE audio feed functional. Note: The java feed may not work but I have no control over it as it's run by a third party.|
|13-Jul-12||I've now relocated to Crestmead approx 40km from Brisbane Airport in QLD. Site is now up and running from this location. Enjoy!|
|1-Oct-11||I'm in the process of changing web hosts so for a day or two you *may* notice no movement of aircraft. Once the DNS has propogated properly which could take up to 72 hours, the aircraft should start to move again. Sorry for the inconvenience caused.|
|22-Jul-11||I've added a new Search Panel to the site which allows you to search the web for aviation specific information. It's located on the right of your screen labelled 'Aviation Search'|
|10-May-11||As you've probably noticed, I've relocated the Latest News section from the main map to this flight panel tab. I've also made some other cosmetic changes and fixed some bugs related to Internet Explorer. This site is always best viewed in Firefox 3+ in case you were wondering.|
|16-Apr-10||Just a reminder that Sydney operates a flight curfew between 11pm-6am each day. You may not see any aircraft during this time.|
|27-Nov-10||Internet Explorer users, go into Tools, Internet Options, General, Browsing History, and ensure "Every time I visit the webpage" is ticked.|
|15-Mar-11||ATC Audio is now available. Go to the Flight Panel, then choose the audio tab. If it's not visible, ensure you clear your cache first.|