SS

A  very small aperture terminal  ( VSAT ) is a two-way  satellite  ground station with a dish antenna that is smaller than 3.8 meters. The majority of VSAT antennas range from 75 cm to 1.2 m. Data rates, in most cases, range from 4 kbit/s up to 16 Mbit/s. VSATs access satellites in geosynchronous orbit or geostationary orbit to relay data from small remote Earth stations (terminals) to other terminals (in mesh topology) or master Earth station "hubs" (in star topology).

A radio link is a wireless connection (also called wireless Point-to-Point connection) between two nodes, or radio units, in a data network.

RHP : Radar Head Processor

ACARS is a digital data link system for the transmission of messages between aircraft and ground stations, which has been in use since 1978. At first it relied exclusively on VHF channels but more recently, alternative means of data transmission have been added which have greatly enhanced its geographical coverage. There has also been a rapid trend towards the integration of aircraft systems with the ACARS link. Both have led to rapid growth in its use as an operational communications tool. Modern ACARS equipment now includes the facility for automatic as well as manual initiation of messaging. ARINC guidelines have been defined for all the various avionic components of ACARS.

ADEXP is a format, not a protocol. No restrictions are imposed on the transmission media or protocols to be used, other than that of the character set. ADEXP provides a format for use in on-line, computer to computer message exchange and for message exchange over switched messaging networks (e.g. AFTN, CIDIN, AMHS).

Term Meaning      Azimuth         : Angle along the earth horizon Bearing         : Angle along the artificial horizon (deck) Elevation         : Angle above or below the horizon Range         : Distance along the plane established by the horizon Slant Range : Distance along the true line of sight True         : Angle in earth coordinates with true north as the reference Relative         : Angle in deck-plane coordinates using vehicle heading as the reference Rectangular : Cartesian coordinates typically known as X, Y, and Z Spherical         : Polar coordinates typically known as range, bearing, and elevation

Leonardo’s air traffic control innovations are on show at the 2017 World Air Traffic Management (ATM) Congress in Madrid "Leonardo has also been shortlisted for the Jane’s ATC Awards 2017, taking place during the Show (7th March), in the “Technology Award - reflecting a significant contribution by equipment and systems suppliers” category, for its comprehensive modernisation of ATM systems under Turkey’s SMART (Systematic Modernisation of ATM Resources in Turkey) project now underway, aiming to enhance the country’s ATC infrastructure and services."