The emergence of next generation technologies in Air Traffic Control (ATC) and the requirement to interface new and existing legacy sensor systems has defined the need for a Surveillance Data Distribution System (SDDS) for the last 20 years. Recent experience in deploying SDDS systems has identified additional requirements over those initially discussed in my ICNS paper from 2009 “The Need and Capability of a Surveillance Data Distribution System”. The landscape has changed in the last two decades with modern surveillance sources, new communication protocols, increasing data speeds, conversion and monitoring requirements. The existing SDDS must evolve to accommodate the latest communication technologies and surveillance sources. The distribution of surveillance data has several requirements in addition to just the transfer of data. In addition, it must understand the different protocols and understand the information that it is transmitting. This allows the extraction of critical information such as altitude, range and aircraft identification to allow value added processing and conversion and filtering of the data. Surveillance data is considered mission critical data essential for the tracking and operation of ATC systems. It has strict real-time requirements regarding accuracy and latency and must be highly available (redundant). It also must be capable of delivering surveillance data to a variety of diverse users over a wide geographic area. In today's world, surveillance data is sent over IP and TDM data lines to a wide variety of users ranging from the ATC, Military, Border Security, and commercial users. This can require the need to convert or modify the data to a format that the receiving user can understand. Higher level functions such as multi-sensor fusers are required to remove duplicate messages from different radar sources as well as the need for virtual radars to convert from latitude/longitude (lat/long) sources such as ADS-B to sweep radars. A new requirement has emerged for the capability for the modification of ASTRIX messages to allow for the correction of fields that either the validator or the automation system rejects. This is caused by issues in the source or receiver that don't completely follow the specification or the specification has changed. New security requirements require the validation of input data and hardening of the IP interface as well as encryption of the data.
The Emerging Requirements for a Modern SDDS
08.04.2025
393515 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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