One of the air traffic management systems least well known to pilots is multilateration, sometimes called MLat, or multilat, or WAM (for wide-area multilateration).
Secondary surveillance radar
While the FAA mandate to install ADS-B out equipment for aircraft flying in U.S. airspace by Jan. 1, 2020 is more than six years away, aircraft operating in some countries’ airspace must be compliant starting this December. Avionics manufacturers are ready with equipment to meet the mandates and avionics shops and aircraft manufacturers are working on supplemental type certificates (STCs) to smooth the path for upgrades in many business jet types.
FreeFlight Systems has interfaced its Model 1201 Waas/GPS sensor with the Garmin GTX 330 mode-S transponder to provide an additional 1090-MHz extended-squitter ADS-B Out upgrade solution for GTX 330 owners. The upgrade solution gives aircraft owners more ADS-B Out equipage choices, depending on their aircraft type, existing avionics and flying requirements. It also ensures compliance with the FAA’s Jan.
Aspen Avionics is now offering ADS-B solutions for owners of its Evolution PFD and MFD products. There are two ADS-B product lines, one for delivery of ADS-B data from portable receivers to Aspen’s Connected Panel system and another for certified ADS-B solutions that meet the Jan. 1, 2020 ADS-B out mandate.
“Midair collisions statistics are revealing,” said Avidyne COO Patrick Herguth during the company’s press conference at Sun ’n Fun 2013 (Booth C-71). “Fifty-nine percent of midairs happen near the airport; and 54 percent are between aircraft flying in the same direction.” Herguth was citing a 10-year-long study published by researchers at Massachusetts Institute of Technology in Cambridge, Mass.
Garmin’s GDL 39 portable ADS-B receiver offers a simple solution for pilots who want to receive free weather and traffic information without a lot of complication. The GDL 39 sells for $799 and receives both types of ADS-B signal that are a unique feature of the U.S. ADS-B landscape. Not all portable ADS-B receivers are dual-band; some receive only the frequency that provides free weather information and certain traffic targets.
A new FAA Advisory Circular–Change 1 to AC 150/5220-26–updates vehicle requirements for the use of ADS-B with squitter output, soon to become necessary in ground vehicles on most major commercial airports using ASDE-X systems.
The ADS-B system that is the cornerstone of the FAA’s NextGen ATC modernization plan is at risk of serious security breaches, according to Brad Haines, a hacker and network security consultant who is worried about ADS-B vulnerabilities. Haines first outlined his concerns during a presentation he gave at the Def Con 20 hacker conference in Las Vegas in July.
An Aviation Rulemaking Committee (ARC), tasked by the FAA to advise on ADS-B in introduction strategies, has recommended that the system not be mandated. In large part, this is because many of its potential applications have yet to be fully defined so the benefits payback period on an operator’s investment in the near future would be well outside the typical three-year standard for the major airlines, considered the system’s predominant user group.
Avidyne announced a new mode-S transponder that will make upgrading to ADS-B out capability much simpler. The new AXP340 mode-S transponder is a slide-in replacement for the popular Bendix/King KT76A and KT78A Mode A/C transponders. Retailing for $5,995, including connector kit and mounting tray but not antenna, the AXP340 will be available early next year, in plenty of time to meet the 2020 ADS-B out mandate.
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