Demand Data Repository (DDR)

DDR2 web portal : What's new
Planned releases in 2019

Release 2.9.7 is planned for the first semester of 2019. It will mainly focus on communication between local tools and DDR2 users account in order to implement proper access restriction.

Access here info on previous releases

The objective: provide the most accurate picture of pan-European air traffic demand, past and future, from several years ahead until the day before operations. It can be used to support the Network Collaborative Planning Process: strategic, seasonal and pre-tactical planning as well as for the planning of special events or major ATM evolution projects.

The DDR project was developed in two phases, DDR1 and DDR2.

DDR1 produced future traffic samples, mainly using historical traffic samples adjusted with STATFOR forecast data and the FIPS (Flight Increase Process). It is currently being phased out.

DDR2, now promoted as the DDR service, covers DDR1 functionalities and also collects early available flight intentions from airlines (SSIM/INNOVATA data) and from coordinated airports through the European Union Airport Coordinators Association (EUACA).

Collected flight intentions are used to enrich historical traffic demand and to improve the accuracy of traffic demand forecasts.

The DDR service supports efficient network operations planning. It also provides a refined analysis of past demand to facilitate post-operations analysis and to identify best practices for future operations.


The DDR service addresses the needs of a wide range of users:

  • Network Manager (Central / FAB / Local): to develop the rolling Network Operation Plan (e.g. Route and Airspace design; strategic, seasonal and pre-tactical demand and capacity balancing; the planning of special events;
  • ANSPs: to prepare and optimise their capacity plans;
  • Airlines: to detect flight efficiency improvement opportunities, through the visualisation and comparison of flight plan trajectories for any period of time in the past;
  • ASM actors: for airspace management and coordination processes for available airspace;
  • Airports: to integrate their local plans with the Network Operations Plan.

The table below outlines the differences between DDR1 and DDR2


Day Definition (historical traffic)

The traffic sample for a specific day contains the flights departing on that day.

- No flight is duplicated from one day to the other

- Airspace load  calculated with such traffic will not be accurate at the beginning of the day (some flights departing the day before will be missing).

The traffic sample for a specific day contains all flights flying within an enlarged ECAC area, during the day.

- Flights passing midnight in the large ECAC area will be counted twice in two consecutive days.
- Airspace load will be accurate
4D Trajectory (historical traffic) 4D trajectory is simplified, keeping only a minimum of special points (Top of climb, Start of descent...) 4D trajectory is more accurate as all meaningful special points are kept
Number of flights (historical traffic) All flights having actually taken off are kept All flights having a last filled flight plan set to "accepted" are kept. So, some cancelled flights will be present.
Traffic forecast Traffic forecast is only based on STATFOR predictions and the FIPS process. Forecast accuracy is improved as it incorporates consolidated flight intentions data, mixed with STATFOR predictions, from day of operation till several years ahead.
Airline Trajectories NA New Feature – Historical routes of flights within Europe can be compared and analysed


How to access

For more information on how to register, additional reference documentation and contacts,consult the NM Service Catalogue page on DDR.


DDR2 web portal: Release Notes

15 August 2018

Release of version 2.9.6  It consists mainly in updating the current system managing user’s account with a new one, DB based, and implementing many more features associated with users rights and information
13 February 2018

Release of version 2.9.5 of DDR2. This release contains:

  • Automatic update of metadata file needed for FIPS
  • Fix bug in the internal automatic upload of external data
  • Suppress quick reference guide (double usage)
  • Set all schedule tasks processes high priority
  • Internal dynamic management of DDR2 paths
  • Replace NEST translator by DDR2 translator (quicker and using less memory and easier synchronisation for ALLFT+ new version)
  • For DDR2 admin profile: allows to send a free text to specific user and to send to all (full) users an info line.
  • Update process to cover new CRCO BADA file for cheapest trajectories processing (still compatible with old dataset)
  • Fix a bug of wrong date in so6 when requesting a forecast without STATFOR.
  • Update external tools with new release of SAAM and NEST,
  • Adapt processing to cover new ALLFT+ V4 format.
  • Fix a bug for Editor profile: some private dataset field could not be seen/edited,
  • Add internal new field “airac” describing airspace dataset
  • Improve documentation
21 August 2017

 Release of version  2.9.4 of DDR - Main improvements:

  • DCT usage AIRAC processing. Reports per FAB, from 1701 onwards are available in DDR2 "Reports"
  • Fix problem of ranking in 'historical' calendar
  • Fix problem of date checking on Mozilla browser in "Filtered"
  • Download and generation user's account are now managed correctly
  • Update Quick reference guide
  • Replace DDR2 Jira bug/improvement report by email to DDR team
  • Review internal DDR2 configuration and settings
  • Update internal Wiki techincal documentation
1 March 2017

Release  of version 2.9.3 of DDR. This version contains  a certain number of bugs fixes: 

  • Historical page: missing NESTO lines when coming back from AIRAC to month
  • Historical page: sometimes File status in download queue gets stuck
  • Historical page: ranking is not working properly
  • Historical page: when re-generating a file the display is not correct
  • Historical page: switching several times from month to AIRAC… disabled download et clear selection buttons
  • Internal schedule uploading NEST AIRAC file does not work no more
  • Tools download: license files cannot be downloaded
  • User management page: input of airlines codes should always be translated and stored in upper case
23 January 2017

Release  of version 2.9.2 of DDR. Main improvements:

  • Monthly provision of new CRCO dataset
  • Forecast processing quicker (using several servers in parallel) with display of waiting list and progress bar. 
  • New DCT mapping page 
  • Provide licensing information and source code of external libraries for tools
  • Historical page: NESTO line is shifted below calendar information
  • Filtered page: add online-help buttons and fix some bugs
  • Bugs correction
17 June 2016

New release (version 2.9.1) of DDR. Main improvements:

  • Daily generation of NEST files
  • Several Java processes transferred to the back end
  • Improvement of Dafi
  • A few minor bug-fixing and minor enhancements

13 July 2015

Suppress “VST” name for dataset;
Install new NAS disk of 4Tb;
Adapt URL links to web page;
Fix problem of event that did not appear when logged from outside;
Change of servers for both live and test;
Add environment variables making deployment easier between test and live version.

05 may 2015

Update to NMOC version 19.0;
Finish DCT map integration;
Add to initial Gasel file automatically sent by email a proper meaningful name;
Allow upload & download of quality report both in pdf and Excel;
Dataset page: add a column to indicate tool version compatibility;
Add an entry for Translator version number;
Make all tab with a consistent header;
Update historical traffic generation to new ALLFT+ format.

09 mars 2015

Start DCT integration;
Split documentation per user profile;
Fix uppercase/lowercase login problem;
Adapt regulation plan generation to new NMOC oplog file format; Change of server name;
Position small download menu in historical tab to last downloaded file;
Fix dataset file that had no extension.