Raytheon Systems Limited (RSL) has unveiled a new automatic dependent surveillance-broadcast (ADS-B) receiver that uses a 16 MHz or better sampling rate, a new algorithm and enhanced error correction to decode 1,090-MHz extended squitter transmissions correctly even in the presence of extreme frequency congestion.
Traffic Collision Avoidance System
Sensis is building on its experience of automatic dependent surveillance-broadcast (ADS-B) in the FAA-sponsored Capstone trials in Alaska and the increasing use of its multilateration technology with the development of a 1,090-MHz receiver that is under consideration for deployment on the U.S. East Coast and preparations to deploy a multilateration system at Juneau, Alaska.
When the idea was initially being explored a number of years ago, FAA planners saw a use for automatic dependent surveillance-broadcast (ADS-B) only in Alaska, where the technology would allow aircraft operating beyond the reach of radar to develop their own position data using onboard GPS equipment, and then transmit that data to others in the region through either a microwave satellite uplink and downlink or ground-based VHF network.
In the past several years, avionics manufacturers have introduced a wide range of multifunction displays (MFDs) capable of integrating moving-map information, terrain warnings, traffic, weather and other sensor inputs. The trouble was, nearly all of these units required a relatively large opening for them to fit in the panel.
In late 1995, around the time of the highly publicized crash of an American Airlines Boeing 757 on approach to Cali, Colombia, Dassault launched a research and development program aimed at applying the most advanced avionics technologies then available to a radically different kind of cockpit.
Comments are due by January 23 on a proposal to increase the size of the Minneapolis Class B airspace, namely expanding its upper limit to 10,000 feet msl. Traffic growth, recent TCAS alerts and the advent of a new runway are the main factors behind the proposal. In the first half of last year there were 17 TCAS events reported in the airspace to be included in the proposed changes.
The promise of ADS-B is well known by now: provide quality surveillance at a lower cost than conventional radar and improve situational awareness in the cockpit, thereby reducing the number of accidents or incidents–such as runway incursions–in the air and on the ground.
The FAA has withdrawn its decade-old proposal to rescind its requirement for Mode-S transponders and adopted a new rule that will end the hundreds of Mode-S installation exemptions currently in effect. Beginning March 1, 2007, Part 121 and 135 operators will no longer be exempted to fly without a Mode-S transponder.
Remarkably, the two pilots and three passengers on a NetJets Hawker 800XP and the pilot of a Schleicher sailplane escaped with their lives when the two aircraft collided at about 16,000 feet in VMC on August 28 near Smith, Nev. After the collision the pilot of the glider, 58-year-old Akihiro Hirao, bailed out and alighted safely, while the badly damaged jet made an emergency gear-up landing at Carson City Airport.
Landmark Aviation last month received STC approval to install Rockwell Collins’ Pro Line 21 IDS integrated display system in the Falcon 50. Developed as a replacement for older analog instrumentation, the screen swap brings added capabilities to the airplane for display of graphical weather, electronic charts and maps and flight management system overlays.