and ADS-B), and multilateration technology in the Surveillance environment. It consists into four different independent suites: IRIS (IOSS Recording and Import into SCDB) is the front element of SASS-C handling Surveillance Data from various sensors. The functionality comprises decoding (one between many, ASTERIX data format), recording and computation of statistics. TRES (Trajectory Reconstruction and Evaluation Suite) is the core suite of SASS-C, carrying out the reconstruction of reference trajectories from the input data, and doing the evaluation of Surveillance constituent's performance. SMART (Simulator for Multi-radar Analysis from Realistic Traffic) is an upgrade of the present real-time simulator generating Surveillance data reports by sampling simulated aircraft trajectories. SCAS (Surveillance Coverage Analysis Suite) comprises RASCAL (RAdar Sharing CALculation) and CAPT (Coverage And Planning Tool for ADS-B and TIS-B), a new tool to aid in the positioning of ADS-B and TIS-B ground stations by assessing various communication load scenarios. IRIS and TRES store the surveillance data in a common database. VERIFication v8 and later The version 8 is the result of another re-engineering for better performance and maximum openness. The suite has been re-organised as described in Modules sections. Since 2021, the version identification has changed to the format vYY.N (e.g. 21.3) with YY, the two last digits of the year and N, the iteration over the year. PREDICTion Taking different resolutions of Digital Terrain Elevation Data – DTED as input, PREDICTion computes the theoretical performance of ATC surveillance sensors like radars and ADS-B or WAM ground stations: target detection probability interference between sensors target position accuracy The theoretical coverage is generated in two forms that can be used in other tools like SASS-C VERIFication: screening files: obstacle ranges and elevations per azimuth. surveillance map: minimum visible altitude per cell in horizontal plane. History References Further reading Air traffic control systems