Talk:Traffic information service – broadcast

TIS-B
162.58.0.210 (talk) 23:22, 16 October 2015 (UTC)I don't have time to do a thorough edit and hope someone doesn't mess it up. The current article as described bounces between the subjects TIS and TIS-B which have nearly NOTHING in common. This is becoming a common misconception since TIS-B was introduced.

TIS involves some radars and Mode S transponders. I don't really know a lot about this older system other than it is primarily only available in congested airspace around major airports. Here is a quote: "TIS is a first-generation traffic system that supports cockpit depiction of traffic, using a TIS service available from 107 Mode S terminal radars. These radars have a "software upgrade" in them that recognizes a Mode S TIS transponder and uplinks proximate aircraft traffic.

A TIS-capable Mode S transponder (Garmin GTX 330 or Honeywell Bendix KT73) is needed to receive the information, and a display is needed to depict the traffic graphically. The display is usually a multifunction display or a multi-purpose GPS. AOPA believes that a significant number of aircraft are equipped with TIS capabilities, between 10,000 and 12,000." Reference: http://www.aopa.org/Advocacy/Air-Traffic-Services-,-a-,-Technology/Air-Traffic-Services-Brief-Traffic-Information-Services

TIS-B is part of the new ADS-B concept. Here is what TIS-B does: Part 1 Aircraft that have transponders are seen by radar facilities. This data is sent to Air Traffic Control (ATC) facilities. Somewhere between the ATC facility and the ADS-B ground station, this data becomes filtered.

Part 2 A ADS-B valid client sends their position to a ground station. If that user is configured to receive data, then the ground station will relay all Mode A/C traffic that is within 15 miles and 3500 feet of that client.

Reference: https://www.faa.gov/nextgen/library/media/getSmart_ADSB.pdf


 * This is correct. The edits on 2015-02-23 by 67.0.133.196 introduced this confusion. I just backed out those edits. Mark Mentovai (talk) 16:35, 15 August 2023 (UTC)