Surveillance Analysis Support System for ATC Centres

SASS-C login Access conditions

The Surveillance Analysis Support System for ATC Centres (SASS-C) is software developed, maintained and supported by EUROCONTROL.

SASS C provides interoperable top-level verification (VERIF) and prediction (PREDICT) functionality to civil and military Air Navigation Service Providers (ANSPs), R&D organisations and the ATM industry.

To ensure its stability and reliability, the Agency also provides updates, maintenance and support to SASS-C along with standardised methods for assessing the performance of surveillance infrastructures.


VERIFication function

The SASS C verification function has three objectives:

  • to verify the compliance of the surveillance infrastructure (ATM Surveillance Sensors and Surveillance Data Processing and Distribution System) with EUROCONTROL’s current surveillance standards and specifications;
  • to support air incident investigation, with a particular focus on surveillance aspects;
  • to support the development and implementation of new ATM surveillance systems;

This involves five steps:

  • acquiring and importing data in a variety of surveillance formats;
  • reconstructing multi-sensor surveillance data to build a reference for each flight;
  • comparing reported data to the reconstructed reference;
  • aggregating and reporting comparisons against standard-defined thresholds;
  • investigating, enabled via visual representation to the user. SASS-C’s verification function can be applied to all current surveillance techniques and technologies (PSR, SSR, ADS-B, Multilateration). Evolutions for handling Multi Static Primary Surveillance (MSPS(R)) and Surface Movement Area-specific sensors and Surface Movement Area-specific type of motion as considered in the future. SASS-C’s verification function provides a cost-effective, 24/7 performance monitoring solution.

PREDICTion function

The SASS-C prediction functionality enables the theoretical calculation of surveillance infrastructure performance, probability of receipt of message, calculating for environment interference, and position measurement accuracy.

The function consists of:

  • a 3D grid approach (based on Digital Terrain Elevation Data – DTED - resolutions) for calculating, storing and displaying the results;
  • a design facilitating the input of multiple levels of digital terrain elevation data quality. For every single location, it will use the best terrain data available;
  • the ability to calculate a multiplicity of perspectives by the Surveillance System at any point in space.

The prediction function implements a generic Surveillance Infrastructure model supporting sectorised radar and multi-sectored systems.

SASS-C runs on x86_64 based hardware and Linux of the RHEL family.

Access conditions

A EUROCONTROL Member State Organisations (EMSO) is an organisation mandated by any EUROCONTROL Member States to provide air traffic services in their territory, whether this organisation is state-owned or privatised. Member State military organisations are de facto EMSOs.

An industry providing services to an EMSO is considered to be an EMSO for this purpose.

For Non-EUROCONTROL Member State Organisations (NEMSOs), SASS-C may be made available subject to the signature of a license agreement and upon payment of an acquisition fee of between € 36,500 and € 71,800 and a yearly maintenance fee of between € 10,700 and € 13,600 (the exact fee depends on the size and the annual turn-over of the requesting organisation).

Any organisation outside EUROCONTROL Member States and the manufacturing industry whether located inside a Member State or not are considered as NEMSOs.

An EMSO providing services outside EUROCONTROL Member States is considered to be a NEMSO for this purpose.

SASS-C Maintenance And Support (SACMAS) service is only available to EMSOs. Subscription requests should be submitted by completing the online subscription form .

Please consult our examples of EMSO and NEMSO user license agreements. For questions concerning licensing please contact out Licensing Requests team. For other questions please send an e-mail to the SASS-C Management team.

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