E-SurfMar & the Saint Malo “Route du Rhum”


28th & 29th October – Discussion and Test with IMOCA racing boats for next year’s OceanRace

The EUMETNET E-SurfMar Programme collaborates with EUMETSAT, CLS and OceanOPS to deploy our drifting buoys.

The new phase of the programme requires us to deploy buoys in all oceans. We must therefore have at our disposal a panel of ships allowing us to optimize our deployments. With the help of OceanOPS we have established a strong link with the world of racing sailing, in particular with the Imoca class and more recently with the Ocean Race which will leave in January for a crewed round the world race.

To better understand the constraints of these racing boats, we went to Saint Malo for the “Route du Rhum”. This allowed us to meet the technical teams of ships that will deploy our buoys during the Ocean Race. Several limiting factors have been addressed to enable future deployments. We had with us a buoy from the programme allowing the crews to better understand our problems. We were also able to understand their questions. The Ocean Race, which is organizing its round-the-world trip, will make reinforced bags to allow our buoys to be moved safely during the race without damaging the ship, which is entirely made of carbon.

So we did tests on the ships. We were also able to communicate about our activities within the programme and explain to this community the importance of these buoys for weather forecasts.

Geneva DBCP (Data Buoy Cooperation Panel) 38


Within the framework of the DBCP, Olivier Desprez de Gésincourt, the manager of E-SurfMar and Christophe Guillerm, the manager of the work package data buoys,  went to Geneva for the DBCP 38 meeting (Data Buoy Cooperation Panel) that took place from 31st October to 4th November.

The purpose of this meeting was to meet our different partners face-to-face for the first time in person since COVID-19 and also to present the new Programme Management Team.

The Programme Manager presented his work and, in addition, work shops were organized on the following themes :

-Data management

-Anchored buoys

-Wave measurements

-Capacity building

-Environmental management

-Vandalism and Awareness



For the new E-SurfMar management team, this was a very relevant meeting to discuss and meet with colleagues, especially those at NOAA where an agreement is in place to be part of the GDP UPgrade programme.

We met Marc Lucas from CLS who manages the Trusted programme as part of WMO collegues from OceanOPS.

Finally, it was an essential opportunity for us to share and present our programme.

test page e-abo



Lorem ipsum dolor sit amet. Qui voluptates magni voluptatem voluptas est nulla exercitationem. Eos porro pariatur non deleniti debitis ut quia itaque est obcaecati ratione ut sunt voluptatem cum voluptas odio. In numquam voluptatem ut odio animi ut autem quos! In officia dolor est dolore asperiores rem quia velit sed quam quas At iure quia.

Lorem ipsum dolor sit amet. Qui voluptates magni voluptatem voluptas est nulla exercitationem. Eos porro pariatur non deleniti debitis ut quia itaque est obcaecati ratione ut sunt voluptatem cum voluptas odio. In numquam


Lorem ipsum dolor sit amet. Qui voluptates magni voluptatem voluptas est nulla exercitationem. Eos porro pariatur non deleniti debitis ut quia itaque est obcaecati ratione ut sunt voluptatem cum voluptas odio. In numquam voluptatem ut odio animi ut autem quos! In officia dolor est dolore asperiores rem quia velit sed quam quas At iure quia.

Lorem ipsum dolor sit amet. Qui voluptates magni voluptatem voluptas est nulla exercitationem. Eos porro pariatur non deleniti debitis ut quia itaque est obcaecati ratione ut sunt voluptatem cum voluptas odio. In numquam


Lorem ipsum dolor sit amet. Qui voluptates magni voluptatem voluptas est nulla exercitationem. Eos porro pariatur non deleniti debitis ut quia itaque est obcaecati ratione ut sunt voluptatem cum voluptas odio. In numquam voluptatem ut odio animi ut autem quos! In officia dolor est dolore asperiores rem quia velit sed quam quas At iure quia.

Lorem ipsum dolor sit amet. Qui voluptates magni voluptatem voluptas est nulla exercitationem. Eos porro pariatur non deleniti debitis ut quia itaque est obcaecati ratione ut sunt voluptatem cum voluptas odio. In numquam

More information


Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.


Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.


Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.


Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.


Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

E-SURFMAR – 2018 A year in review



This animation shows the weather and surface marine observations over the Europe-Atlantic area for the year 2018.

Each of the 24 frames per second shows, for a given date and hour, contours of 6-hour averages of mean-sea-level pressure from ERA5 (generated using Copernicus Climate Change Service information 2019), as well as locations of all observations from buoys or ships or fixed platforms received within +/- 12 hours.


E-SURFMAR – a year in review


The weather of 2017 at the marine surface over the EUMETNET area can be viewed above.


Programme Management




The objectives of the EUMETNET Observations Programme Management are:

– To design and coordinate the evolution of the ground based EUMETNET Composite Observing System (EUCOS) to be optimized on a European scale with a view to improving short range forecasting and climate monitoring over Europe without increasing the overall cost, in line with the EUMETNET Strategy defined by the Assembly;

– To monitor and control EUCOS performance;

– To ensure effective management for the fully integrated components E-ABO, E-ASAP, E-GVAP, E-PROFILE,  E-SURFMAR and OPERA;

– To support Member State activities to design, coordinate and operate networks to support general forecasting, including kilometre-scale NWP, and climate monitoring and to facilitating international collaboration (e.g. through the facilitation of information exchange and multi-lateral discussions);

– To provide representation on observational matters on behalf of and supporting the interests of EUMETNET Members within international fora including those relating to WMO and GMES;

– To support the evolution of European and national network design through a studies programme.

  • "optimisation of EUCOS on a European scale"

The tasks

– Organising two meetings a year with the Operational Service Managers and Project Managers of the Observations Programme,

– Coordinating activities, monitoring progress, work plans, requirements tracker, risk register etc.

– Produce common Observations Programme mid-year reports to STAC, PFAC and Assembly.

– Work with the EUMETNET Secretariat to ensure that the programme budget proposals for the Observations Programme and integrated Operational Services are delivered in line with the EUMETNET EIG budget and business planning cycle in the Financial Rules.


The requirements

Coordinate the Observation Programme and the Observation Operational Services and Projects according to the tasks given in the programme decisions of the individual services and projects by:

– Identify issues and prepare supporting information for decisions within the Observations programme that have to be referred to STAC and/or PFAC.

– Prepare statements on proposals for new operational services, projects or activities within the Programme.

– Represent EUMETNET at meetings of the Observation Programme Managers.

– Represent EUMETNET at international Conferences/Meetings.

– Represent the Observation Programme at STAC, PFAC and /or Assembly, if necessary.

– Coordinate and lead strategic roadmap development in the Observations Programme.

– Interact with and ‘light’ coordination of STAC Working Group activities (example: WG-INS). Usually those WGs should work independently.

– End of Phase reviews of Observation Programme.

The organisation

The current phase of the Programme started in January 2019 and will last until the end of 2023.The Coordinating Member is the UK Met Office. The Programme Manager is Jacqueline Sugier. The Observations Programme Management Team is comprised of three staff members.

The Observations Programme Management Team is advised by the Observations Programme Advisory Group and the Observations Scientific Expert Team.

The overall structure of the Obs Programme can be found here.

More information


EUCOS is the ground-based or non-satellite observing system designed for EUMETNET Members to serve the needs of the EUMETNET Forecasting (incl. general numerical weather prediction) and Climate Programmes and those of the Members over Europe.

Data is provided from several observing networks of all National Meteorological (and Hydrological) Services (NMHS) participating in EUMETNET. The data are collected within the EUCOS area 10°N – 90°N, 70°W – 40°E.

The EUMETNET Observations Programme Management Team is responsible for the EUCOS co-ordination. One of the main deliverables is to provide statistics summarising the performance of each component of the network, which now comprises of:

– All European ASAP ships (ASAP = Automated Shipboard Aerological Programme)
– All European AMDAR aircraft (AMDAR = Aircraft Meteorological Data Relay Programme)
– Selected European radiosonde stations
– Selected surface synoptic stations
– European VOS ships (VOS = Voluntary Observing Ships)
– Selected moored and drifting buoys
– Selected European wind profilers and weather radars
– Selected GNSS sites providing GPS delay and water vapour measurements.

The co-ordination of the data acquisition is on the one hand within the responsibility of the Observations Programme Management Team – such as the co-ordination of the surface synoptic stations and the radiosonde stations. On the other hand the Observations Programme Management Team is supported by programme components which are co-ordinated by Operational Service Managers or Project Managers. The operational services and projects are:

– E-AMDAR (data acquisition from AMDAR aircraft)
– E-ASAP (data acquisition from ASAP ships)
– E-GVAP (data acquisition of European GPS delay and water vapour measurements)
– E-PROFILE (data acquisition from European wind profilers and weather radars and work on establishing a data exchange of Lidar/Ceilometer measurements for the purpose of volcanic ash monitoring)
– E-SURFMAR (data acquisition from European VOS ships and buoys)
– OPERA (data acquisition of European weather radar data to provide European weather radar composite products).

Studies Programme

The operational part of the Observations Programme will be steadily improved by considering experience gained from operations and specifically by taking into account the results of a dedicated studies programme. Changes in networks should be based on scientific analyses and therefore the EUMETNET Observations Programme launched several data impact studies in the past. A selection of completed studies is briefly described on the bottom of this page.
Data impact studies usually comprise of a set of observing system experiments (OSE) or similar NWP experiments which are run to assess the impact of different observing systems on NWP forecast skill. NWP groups of NMHSs or ECMWF conduct the studies and the Observations Programme works as an interface between data users and providers.
Eventually recommendations are derived from the data impact studies which shall give guidance on how to (re)design the EUCOS in order to better meet the user requirements.

Planned studies in the Programme phase 2013-2018

In the current programme phase new findings from recently developed ‘Forecast Sensitivity to Observations Impacts’ (FSOI) tools or classical Observing System Experiments (OSEs) will help to define the contributions made by the various components of the terrestrial composite observing system. It will also be vital to take into account the increasingly important contribution made by the space segment, therefore the EUCOS network must be designed to best complement the operational space segment, and this should be an ongoing process.

·       The study on the impact of humidity observations reported from aircraft is one of the major issues to cope with in the current programme phase. In parallel a general FSO study which shall assess the impact of all EUCOS networks will be prepared. Outcomes of this study will be the basis for any EUCOS redesign considerations.

·       Taking into account especially results from the second Space-Terrestrial Study a new set of scenarios for OSEs will be proposed, which shall help to determine the impact of 10 and 20% reductions or increases in the budgets of the expensive ground-based observing platforms: E-AMDAR, E-ASAP and national radiosonde networks.

·       Taking into account that EUMETNET is going to significantly increase its efforts to create high quality Radar data and products via its OPERA programme, a first combined FSO/OSE impact study for kilometre-scale models will be initiated which will look into the impact of spatially and temporarily highly resolved observations like Radar observations. Special emphasis will also be given to other observing platforms with high temporal resolution like wind profilers, E-GVAP and E-AMDAR.

Selection of Studies of the Programme phase 2007-2012

Space Terrestrial Study

A joint study between EUCOS, EUMETSAT, ECMWF and a number of NMHSs had been conducted in 2006/2007 to better understand the impact of the various components of the full space-based and terrestrial observing system on the performance of regional NWP in the 1 to 6 day forecast range.

Forecast Error Contribution for different observing types; copied from 2nd Space Terrestrial Study ECMWF Final Report.

Upper-Air Network Redesign study

The main objective for the Upper-Air Network Redesign study was the definition of a European-wide network of ground-based upper-air observing systems whose configuration and setting is based on scientific analyses. The S-T study had shown that despite of all the additional new satellite observations, the degrading of the current terrestrial observing system to a basic network would have a significant negative impact on the forecast skill.


Horizontal distribution and vertical histogram (relative frequency) of European AMDAR profiles below flight level as used in baseline scenario in a typical 4DVAR window; copied from Upper-Air Network Redesign Observing System Experiment ECMWF Final Report

Data Targeting System (DTS)

The aim of data targeting is to deliver additional observations when and where they will be most beneficial to subsequent forecasts. The locations, “sensitive areas”, will vary from day to day and the supplementary observations will be most valuable if they help reduce uncertainty in cases of potential high-impact weather. A full trial of the DTS took place three times. For the EURORISK/PREVIEW project between February and December 2008, for the DTS-MEDEX-2009 campaign between September and December 2009 and for the HyMeX campaign between September and November 2012. Extra observations were requested from available E-AMDAR (commercial aircraft), E-ASAP (ships) and EUMETNET Members’ radiosonde stations in the target areas. All additional observations were available on the GTS and could be used in forecast models.

Example of ECMWF DTS Extra Observations Proposal for 05/10/2008

Programme Evolution

The EUCOS Operational Programme was established on 1st January 2002, based on recommendations resulting from the EUCOS Implementation Programme managed by Météo-France, which started in 1999 and ended on 31st December 2001. It aimed to establish and operate a truly European observing network under the auspices of the European Meteorological Network (EUMETNET), to deliver increased efficiency, leading to better-quality numerical and general forecasts, initially on a European scale.

EUCOS Operational Programme 2001-2006
Since 2002 the EUMETNET Composite Observing System (EUCOS) was being developed from the planning phase to an operational programme as an integrated terrestrial observing system for Europe serving the needs of regional numerical weather prediction. EUCOS has evolved rapidly by active co-operation and support of all the members of EUMETNET. In the period 2002 till 2006 the UK Met Office was responsible member of the EUCOS Operational Programme.
2002 saw the establishment of EUCOS as an ‘operational’ network with agreed performance standards, fault reporting and change control mechanisms. Monitoring of overall network performance began in earnest in 2003 and quickly revealed areas for improvement. At the same time major parts of the Studies Programme were implemented including:

  • the High Frequency AMDAR trial (HF AMDAR)
  • the Atlantic THORPEX Regional Campaign (A-TREC)


The first study confirmed the surfeit of upper air data across central Europe and indicated that benefits from sub 3 hourly sampled AMDAR profiles would only be obtained in the more outlying, data sparse zones such as northern Scandinavia, the Mediterranean and the Iberian Peninsula.

The second study was designed to help address the definition of a targeted observations programme for Europe to improve regional NWP skill, especially concerning high impact weather events. Small positive impacts on forecast quality were generally obtained but it was clear that further research effort is needed to fully define a targeted terrestrial observing system. This work continued under the EU GMES EURORISK-PREVIEW Programme in which EUCOS was responsible for developing improved methodologies for meteorological observations targeting and conducting a demonstration of capability in 2008.

The E-SURFMAR programme was established during 2003 as an optional element supported by 15 countries on the basis of a detailed programme proposal. This was followed by a comprehensive design study which was accepted at the autumn 2004 EUMETNET Council meeting. The E-SURFMAR Programme has seen significant reorganisation in the management of marine observing programmes within Europe.

EUCOS Operational Programme 2007-2011 (prolonged to 2012)

The EUMETNET Composite Observing System (EUCOS) has been developed as a comprehensive and integrated terrestrial observing system for Europe serving the needs of regional numerical weather prediction (NWP). Already in the programme phase 2002-2006 it was clear that in the long term the remit of the programme may be extended to other application areas such as short range forecasting, nowcasting or even climate monitoring, but for the programme phase 2007-2012 the focus remained on meeting the needs of regional NWP.

The discussion planning the programme phase 2007-2012 for EUCOS started at the specially convened PB-OBS workshop in Dublin, November 2004. Given the fact that results from the Studies Programme were not available before mid 2007, a two stage approach was accepted for the programme 2007-2012. In order to achieve the programmatic targets set in, this programme phase was split into two parts.

In January 2007 the Deutscher Wetterdienst (DWD) took over the responsibility of the EUCOS Programme Management. To achieve the programmatic targets it was furthermore necessary to develop the EUCOS infrastructure by:

  • operating and improving the EUCOS information system;
  • revising quality monitoring requirements and improving the reliability of some of the existing important radiosonde and surface synoptic stations in co-operation with the national contact points;
  • delivering a timely flow of EUCOS funds from participants to the various components of the programme.


Within the programme phase 2007-2012 DWD launched and operated a new EUCOS Quality Monitoring Portal (QMP) and initiated and monitored scientific studies like the ‘Upper-Air Network Redesign Study’ or the ‘2nd Space-Terrestrial Study’. In collaboration with the programme component E-AMDAR the addition of humidity measurements on AMDAR aircraft was initiated with high priority. A second space terrestrial study investigating the benefit of the expected additional satellite data from METOP and the improvements in data assimilation schemes has also been initiated by the EUCOS Team. Further the EUCOS Team continued to operationally integrate data from WINPROF, OPERA-III and E-GVAP and the requirements for a central data hub with high availability were exploited.

Due to the transition of EUMETNET into the new legal body ‘EIG EUMETNET’ the operational EUCOS Programme phase was prolonged to 2012.

In the period 2010-2012 the EUCOS Team contributed to the evolution of the EUMETNET Observation capability area by proposing new activities or by supporting the development of the EUMETNET Observations Roadmap 2012-2020. Thereby the EUCOS Team responded to the growing interest of Members to include requirements from many different data users (e.g. general NWP, Climate and Nowcasting), to extend the remit of the programme beyond regional NWP and to show benefits for the Members. The EUCOS Team led the drafting of the Observation Requirements for the new programme phase 2013-2017 on which the call for tenders for the next programme phase 2013-2017 was based.

DWD successfully applied again to be Coordinating Member of the current Observations Programme phase 2013-2017 (prolonged to 2018).

Quality Monitoring

One of the major tasks of the Observations Programme Management Team is to ensure the delivery of quality assured data by operating several web-based automated tools to monitor the performance of the EUCOS networks and to perform active quality control of the EUCOS and Members’ observing networks by regularly monitoring of data availability, timeliness and accuracy.

Following defined fault recognition and escalation procedures the Observations Programme Management Team raises fault reports in case of failures or outages of observing systems, contacts national focal points or Operational Service/Project Managers and coordinates tasks to solve the issues. Further the Observations Programme Management Team provides quarterly and annual reports on quality monitoring issues for all EUCOS networks.

The performances of designated EUCOS stations are compared against targets on data availability, timeliness and accuracy defined in the ‘EUCOS Performance Standards’. These Performance Standards have to be revised in order to take into account new requirements of EUMETNET’s Forecasting and Climate Programmes and new emerging needs from NWP in the programme phase 2013-2018.

Initial integration of GUAN and GSN station lists into the existing EUMETNET EUCOS RA VI Quality Monitoring Portal and associated procedures and programmes.

In coordination with the GCOS Network Manager the station lists of GUAN and GSN stations to be monitored in the EUMETNET RA VI Quality Monitoring Portal were defined in summer 2015. To distinguish between the quality monitoring statistics of Regional Association VI (Europe) and the global GCOS quality monitoring a selection function was implemented to allow the users to select the area / network of interest. Furthermore it was decided to rename the RA VI QMP into ‘WMO Quality Monitoring Portal’. The release of the new WMO Quality Monitoring Portal containing the GCOS quality monitoring statistics went online under https://eucos.dwd.de on 9th November 2015. Thus, the initial integration of GUAN and GSN stations into the quality monitoring portals operated by EUMETNET was finalized end of 2015 and quality monitoring statistics are available back to July 2015 at present.


Radiosonde Stations

The EUCOS territorial segment comprises of selected radiosonde and surface stations operated by members. The EUCOS upper-air network includes those radiosonde stations necessary to meet the requirements of Regional NWP over Europe. Results from the EUCOS studies of the programme phase 2002-2006 have led to a network comprising of 50 stations, data from which should be complemented by approximately 750 AMDAR profiles per day by 2006. Following the recommendations of the Upper-Air Network Redesign Study the EUCOS upper-air network has been revised in 2010 and consists of 93 stations since then.

The Observations Programme Management Team monitors the performance of the designated EUCOS radiosonde stations on a regular basis and contacts the operating Members in case of failures and outages. Within the current programme phase the EUCOS radiosonde station network might be revised according to new user requirements from km-scale modelling, nowcasting and climate monitoring.

Surface Land Stations

The EUCOS territorial segment comprises of selected radiosonde and surface stations operated by members. The EUCOS surface land station network comprised of 210 manual and automatic stations since 2006 satisfying the main user requirements from general forecasting and NWP. The central monitoring of the EUCOS surface land stations aims at improving data quality, network reliability, and data timeliness. An evenly-spaced network has been selected with an average spacing of not more than 250 km. Priority has been given to stations collocated with EUCOS upper-air sites, and additional surface stations were selected around the Alps and Pyrenees as well as Azores, Canary Islands, Iceland and Greenland.

In 2010 the EUCOS surface land station network has been updated to close gaps within the network and to allow the new member countries Croatia, Estonia, Slovenia, Poland and Serbia to introduce surface land stations to the EUCOS network. It was agreed in 2009 to harmonize the EUCOS surface land station network with the requirements of climatology. At its meeting in March 2010, the ECSN (European Climate Support Network) Advisory Committee (EAC) has developed a roadmap for embedding climate requirements into the EUCOS surface land station network. EAC has set up a working group to develop the design of ESCLSN, the EUCOS surface climate land station network in cooperation with the EUCOS Team.

The Observations Programme Management Team monitors the performance of the designated EUCOS surface land stations on a regular basis and contacts the operating Members in case of failures and outages.

Within the current programme phase the EUCOS surface land station network might be revised according to new user requirements from km-scale modelling, nowcasting and climate monitoring. The updated EUCOS surface land station network 2013 consists of 268 synoptic stations (see map below).





The purpose of E-GVAP is to provide for EUMETNET members ground-based GNSS (Global Navigation Satellite System) Zenith Total Delay (ZTD) estimates in near real-time (NRT) for use in operational meteorology.  As ZTD is sensitive to water vapour E-GVAP provides additional water vapour information to weather models and meteorologists in Europe and beyond.  That´s important, since water vapour is a key constituent in many weather phenomena, and varies strongly in both space and time. Water vapour is “under observed”. E-GVAP is helping to fill that gap.

  • water vapour data from Navigation Satellite Systems

The tasks

The main task of E-GVAP is first of all to provide GNSS ZTD data in NRT for usage in operational numerical weather prediction (NWP) models and for usage by forecasters.

Secondly E-GVAP is to expand the GNSS network contributing to meteorology. Mainly as regards inclusion of new regions, but also as regards densification in regions.

Thirdly E-GVAP is to help its members using ground-based GNSS data in their operations, which is done by sharing of results and howto´s from successful users.

Also E-GVAP is to follow the development in ground-based GNSS meteorology, where several new techniques are emerging and gradually maturing, such as estimation and use of ZTD gradients, Slant Total Delays (STDs) and 3D water vapour from tomography. In the future they will lead to much more humidity information from the same number of GNSS receivers.

The requirements

 Requirements are set both with respect to timeliness and precision of the E-GVAP ZTD data.

The EUCOS QMP monitors timeliness and precision of E-GVAP data in a similar fashion to the monitoring of other EUMETNET Obs Programme data.

E-GVAP itself, as well as many of the analysis centres, performs  more detailed monitoring. Part of the E-GVAP monitoring can be seen at http://egvap.dmi.dk select entry “validation”.

Other parts require access to the E-GVAP ftp server.


The organisation

The current programme phase will last to the end of 2023. The Danish Meteorological Institute (DMI) has been the coordinating member since 2005. The programme itself is run in a collaboration between DMI, the UK Met Office and the Royal Dutch Meteorological Office (KNMI). The programme manager is Dr. Henrik Vedel, DMI.

The real base of the programme is a tight collaboration between geodesy and meteorology. The vast majority of the raw GNSS data used E-GVAP come from geodetic institutes and private GNSS companies. The majority of the GNSS data processing is done at geodetic institutions and universities, but also at a few met offices.  

As several members run global weather models, and there is currently no global organisation of ZTD exchange, some E-GVAP analysis centres process also global GNSS data, and E-GVAP is expanding its collaboration with analysis centres outside Europe.


More information

History & Status

GNSS meteorology explained

Review of the state of the art and future prospects of the ground-based GNSS meteorology in Europe:


(to be completed)

Participating GNSS analysis centres





The main aim of the EUMETNET-ABO (Aircraft Based Observations) Operational Service is to fulfil the requirements of the EUCOS Operational Programme for measurements of high quality upper air meteorological variables from aircraft.

  • "measuring high quality upper air meteorological variables from aircraft"


The continued, sustainable access to high quality upper air observations of temperature, wind speed and direction (and humidity where possible) from commercial aircraft.

Improved uniformity of coverage of airports providing 3-hourly profile observations across the EUCOS domain.

Ensuring the monitoring and reporting of individual network performance to enable the effective combination of the different data sources into one, efficient observing network.

Implementing new capabilities to enable more aircraft based observations to be produced within a reduced data budget.

Continuously seeking to introduce efficiencies via targeted use of cost-effective data sources or transmission methods.

Deliver quality-controlled aircraft-derived data from Mode-S EHS/ADS-B via the EMADDC operated as a service to the EUMETNET community by KNMI.

Flexibility to facilitate the provision of additional data required by individual NMHSs.


The current 5-year phase of the E-ABO programme began on 1st January 2024 with the Met Office as the Coordinating Member, working in partnership with KNMI and DWD. KNMI operate the EMADDC for the provision of aircraft derived data from ADS-B/MODE-S EHS data and DWD manage the AMDAR data optimisation and humidity contracts. 

Programme Manager: Martyn Sunter, Met Office

Technical Coordinator:  David Snook, Met Office

More information

Data & Infrastructures

E-AMDAR is EUMETNETs contribution to the World Meteorological Organization (WMO) Aircraft Meteorological Data Relay (AMDAR) observing system. E-AMDAR facilitates the fully automated collection and transmission of weather observations from commercial aircraft. The E-AMDAR programme is an integrated component of the WMO Global Observing System (GOS) of the World Weather Watch (WWW) Programme . The system is operated by EUMETNET Member NMHS in collaboration and cooperation with partner airlines. Onboard sensors, computers and communications systems collect, process, format and transmit the weather data to ground stations via satellite and VHF radio links. The transmission of this data is most often performed by the aircraft’s ACARS (Aircraft Communications Addressing and Reporting System) system. Once on the ground, the data is then relayed to the global network of national meteorological services and other authorised users.


Modern aircraft carry sensors to measure the Mach number (using a pitot static probe) and air temperature. An enhanced surveillance (EHS) air traffic control radar interrogates all aircraft in sight in a selective mode (Mode-S), on which the aircraft replies with a message containing, for example, magnetic heading, airspeed and Mach number. These messages can be collected by Air Traffic Control or by a network of local receivers. The EMADDC use these messages to derive tens of millions of wind and air temperature observations in Europe.  


Additional aircraft based observations are received from AIREPS and ADS-C messages. Third-party data known as TAMDAR and AFIRS AMDAR complement the other networks.



The first meteorological data from aircraft were collected in the early 1900s. Following development of the concept for transmitting aircraft temperature and wind information to the ground in real-time by the Australian Bureau of Meteorology in the 1980’s, European National Met Services (NMHS) started developing their own Aircraft Meteorological Data Relay (AMDAR) Programmes with their national airlines. Each NMHS was then responsible for providing this data to the GTS.

Initial airlines and start dates:

KLM (1993)
Air France (1995)
British Airways (1998)
SAS (1998)
Lufthansa (1999)

Met Office (UK) developed an automated data processing system to handle British Airways data and so the opportunity arose to provide a single processing system for all European AMDAR data.

There are now 15 airlines participating in the E-ABO AMDAR programme and more than 1000 planes providing meteorological data.

Wind and temperature observations derived from ADS-B/MODE-S EHS messages has enhanced the coverage of aircraft based observations over Europe in recent years and is now centralised through the creation of the European Meteorological Derived Data Centre (EMADDC).






The objective of the EUMETNET-ASAP (E-ASAP) Operational Service is to:

coordinate and optimize weather balloon observations (so called radiosoundings) over the data sparse ocean regions in the EUCOS area of interest. Most of these observations are performed by the crew members on board merchant vessels in regular service between Europe and North America.

  • "Coordination and optimisation of weather balloon observations over the ocean regions"

The tasks

– to design the E-ASAP Operational Service to meet the requirements, and in particular identify suitable merchant ships;

– to negotiate and conclude contracts in association with NMSs as appropriate with the shipping companies;

– to procure the necessary equipment or reimburse NMSs for the procurements;

– to ensure proper installation, training and logistics for the supply of consumables;

– to establish means of communication, insertion on the GTS and monitoring of performance;

– to liaise with the other components of the EUCOS programme and with the ASAP Task Team of the WMO.

The requirements

A. To deliver 3900 radiosoundings (from 18 stations) onto the Global Telecommunication System (GTS) and to make the data available to all National Meteorological Services (NMSs) for their weather forecast.

B. To optimize the overall system regarding efficiency of sounding operations and distribution of sounding data.

C. To contribute to the World Weather Watch of WMO through a limited number of soundings produced outside the EUCOS area of interest.

The organisation

The current Programme phase will last until the end of 2023. The Deutscher Wetterdienst has been the Coordinating Member for the Operational E-ASAP since 2003. The Operational Service Manager is Mr Rudolf Krockauer.


Article published in the December 2009 issue of the periodical Seaways. Purpose of the Article is to promote E-ASAP in the seafarer’s community. Read the article.