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SWIM Terminal Data Distribution System (STDDS)

STDDS Overview

SWIM Terminal Data Distribution System (STDDS) converts legacy terminal data collected from airport towers and Terminal Radar Approach Control (TRACON) facilities into easily accessible information, which is published via the National Airspace System (NAS) Enterprise Messaging Service (NEMS).

STDDS publishes data from the following FAA airport and terminal systems:

  • ASDE-X - Airport Surface Detection Equipment – Model X
  • ASSC - Airport Surface Surveillance Capability
  • STARS - Standard Terminal Automation Replacement System
  • RVR - Runway Visual Range
  • EFSTS - Electronic Flight Strip Transfer System
  • TDLS - Tower Data Link Services

STDDS publishes data to NAS and non-NAS subscribers, via NEMS, in accordance with SWIM standards

STDDS Architecture
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STDDS is installed at 38 TRACONS

  • Access to data from over 200 airports
  • Data from over 400 individual systems
STDDS Architecture
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STDDS News and Events

STDDS R4 Deployment Complete (3/7/2019)

STDDS R4 deployment is complete, with R4 data now being published at all 38 STDDS sites.STDDS R4 enhancements include the integration of SFDPS flight plan data to the SMES, TAIS, and TDES services and the publication of filtered TDES data and TDLS D-ATIS messages. Please see the Release Notes in the STDDS Documents section for more information on these and other R4 enhancements, and technical documentation (schema, sample data,JMSDDs) on the NSRR.

R4 also adds new STARS and ASSC sites, please see the Site Availability Document (MS Excel) file in the documents section for details on their availability; a few have been delayed due to the shutdown and will be added in the coming weeks.

Please email any questions to

Refreshed RVR Website Launched (1/2/2018)

The new FAA RVR website is live at and has been expanded to include STDDS APDS airports (currently 131 airports). The old RVR website at will be decommissioned at somepoint in the future. Please update your bookmarks accordingly.

Important notification regarding beacon code information (10/11/2017)

Please see the new document in the STDDS Documents section, Beacon Code Notification (10/11/2017) (PDF), for further information.

FIXM (10/10/2017)

The FIXM-Mediated STDDS Data Overview document is now available in the STDDS Document section. Corresponding STDDS data in the internationally accepted FIXM-compliant format is scheduled for availability by early 2018. See for more information about the FIXM standard or contact the STDDS team at if you need additional assistance.

STDDS Frequently Asked Questions & Answers

  • APDS (Airport Data Service): RVR Data, visual runway range and trend, runway edge lighting
  • SMES (Surface Movement Event Service): ASDE-X/ASSC data, OOOI events (Spot Out, Off, On, Spot In), Category 11/Category 10 position reports.
  • TAIS (Terminal Automation Information Service): STARS data including status, track and flight plan, alert, SISO event, IMC status, traffic count, and performance monitoring
  • TDES (Tower Departure Event Service): TDLS/EFSTS data, including parking gate, clearance delivery time, taxi start time, takeoff time, and departure runway (currently only available to authorized user; public access is planned for STDDS R4)
  • ISMC (Infrastructure, Monitor and Control Service): Provides periodic status information for all STDDS sites and services

NSRR contains STDDS technical details such as the Java Messaging Service Description Document (JMSDD), XML schema describing the STDDS messages, sample data, and documents providing details on data fields.

NAS Service Registry/Repository (NSRR) is a SWIM-supported capability for storing, sharing, and managing information about all SWIM-enabled services, including both operational services as well as services in development. Access to NSRR requires an account which can be easily obtained here.

STDDS is available in three FAA environments:

  • Research & Development (R&D)
  • FTI National Test Bed (FNTB)
  • NAS Operations

Consumers on-ramp separately to each of these environments. Consumers develop their client software by connecting to STDDS via SWIM in the R&D environment, perform formal qualification testing with the FAA in the FNTB environment, and upon approval may connect to the NAS Operations environment to receive live data.

The Site Availability document (MS Excel) contains information about what sites is publishing which data, and future site and data availability.

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