Tag Archives: high frequency datalink communications

Find out more about HFDL for commercial aviationAs most of the aviation world looks to satellite communications, let’s spare a thought for High Frequency Data Link, commonly known as HFDL. Primarily used for long-haul and trans-oceanic flights, when VHF line of sight communications is insufficient, HFDL is a HF data link protocol, operated by ARINC as a GLOBALink ACARS service via a ground network of HF stations, whose coverage spans much of the Earth’s surface.

More robust than voice communications, HFDL transmissions are often used by the military and on board aircraft, HFDL integrates seamlessly with the flight management systems.

Recent developments in software for HFDL means that the service offers comparable message success rates to VHF and satellite datalink.

Iridium Satellite Communications ProvidersL2 Consulting Services has announced that the Civil Aviation Administration of China (CAAC) has issued Validation Supplemental Type Certification for the installation of Iridium Satellite Communications Systems on 737 aircraft last month.

This follows the original FAA certificate for Rockwell Collins’ IRT-2120 Iridium SATCOM system and ICG NxtLink ICS-220A, both providing the flight crew with dedicated data link channels to support ACARS, CPDLC, an exclusive global voice channel and FANS messaging.

L2 are avionics engineering, installation and integration providers and have specialised in this area of the industry since 1997, with the integration of digital avionics systems into analog aircraft. The company currently hold existing Iridium certifications for B747, B757 and B767 aircraft and handle the STC regulatory process with the European Aviation Safety Agency (EASA).

L2 Vice President of Operations, Dean Rudolph said, “We are delighted to have received the CAAC validation of our STC and are now able to offer our customers in China a fully certified Iridium Communications solution on the B737NG series aircraft.”

Global Coverage with Ground-Stations Networks for AviationRussia plan to deploy a maximum of seven new ground-stations in foreign countries in a bid to improve satellite navigational capabilities with Glonass system monitoring by the end of 2014. The new ground-stations will join 46 that currently operate within Russian territory, three in Antarctica and one in Brazil.

The news was announced at the Security Technologies exhibition conference earlier this month and the focus, according to Vladimir Klimov, Glonass Association Executive Director, is to create a worldwide Glonass augmentation network.

In order for high-precision navigation and communications to operate seamlessly, it is critical that satellite networks can communicate globally with a series of ground-based stations or receivers. High frequency data link communications for example, can only be seamlessly effective if geostationary satellite transmissions can form a truly global network, including remote, Polar Regions and vast oceanic expanses. This is made possible by overlapping coverage zones with carefully placed ground-stations and high frequency receipt and transmission technology is installed within aircraft.

Other aviation HFDL providers include ARINC who successfully achieve global coverage utilising the Iridium and Inmarsat satellite networks.

High Frequency Data Link (HFDL) for Aviation

Garmin International Inc., part of Garmin Ltd., has announced a new portable ADS-B and GPS receiver, the GDL 39 3D. The device adds simultaneous display of aircraft attitude information (pitch and roll), interactive mapping, traffic, and weather information to the Garmin Pilot(TM) application, and includes Garmin’s TargetTrend(TM) relative motion technology.

Garmin say that the subscription-free weather data provided with the system will be similar to that offered by commercial satellite weather providers while the dual link ADS-B receiver will be able to supply ADS-B traffic, weather, and WAAS GPS data to Bluetooth(R) compatible iOS and Android devices.

The GDL 39 3D is able to serve data to two devices wirelessly while hardwired to a third, and gathers traffic and weather information from the vicinity in such a way as to make it available the moment the device is switched on.

Garmin’s Vice President of Aviation Sales and Marketing, Carl Wolf said that the new device demonstrated the companies commitment to easing the transition to ADS-B for all aircraft owners.

High Frequency Data Link (HFDL) for AviationSyberJet Aircraft acquired the rights to the SJ30 light twinjet aircraft in 2011 and moved production to Utah.  Honeywell agreed to provide the upgraded avionics and production is set to get moving again.

Honeywell’s new avionics system will include SmartView flight display and moving map plus dual FMS with many additional features including graphical flight planning, weather radar charts and maps and electronic checklists.

The system will support FANS/1A, controller pilot (CPDLC) and High Frequency Data Link (HFDL) operations as customer-specifications, in addition to SATCOM, flight data and cockpit voice recorder.

An SJ30 test aircraft will be outfitted with the new avionics and SyberJet expect it to make its first flight in early 2014 with a view to certification being attained by the end of next year.  The jet will feature a new interior, currently being worked upon, to include extra seating, while reducing weight even further.

The Jet, which may be marketed for $7.25 million, will be equipped with passenger cabin services for in-flight entertainment and an information system that will allow access from personal devices, such as Smartphones or iPads.

SyberJet General Manager Mark Fairchild said “Our new management is very conservative,” he said. “We want to under-promise and over-deliver,” when asked about delivery schedules.

The SJ30 was originally the GulfJet and was designed by Ed Swearingen in the late 1980’s.  Since its certification in 2005, the SJ30 has been owned by several companies before being acquired in 2011 by SyberJet.