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  Procedure for the Station Inclusion in the GAW Programme
  • Please carefully study the essential requirements for a GAW station to make sure that your station qualifies for one of the types.  You can suggest the type of the station in your application but final decision will be made based on the basic requirements met by the station (see part REQUIREMENTS).
  • Fill in the application letter and send it by email and by ordinary post (a signed paper version) to : Dr. Oksana Tarasova ( Chief, AER/WM
  • To update the status of the registered stations similar letter is required.
  • Your application will be considered by respective expert group and confirmation will be sent to you. Please kindly specify your contact details in the application.
  • Together with a submission of the application please register your station in the GAW Station Information System (GAWSIS) at
  • As soon as you get a confirmation of acceptance (about 1 month after application is received in the WMO Secretariat or longer if additional considerations are needed) the status of the station in GAWSIS will be updated and the station becomes visible to the public.
  • If you have started your measurement earlier than a year ago, please submit the data to the respective World Data Center (see information If you have just started your measurement programme kindly submit the data and metadata in due time.
  • Annually (or more often if needed) check/update the information in GAWSIS on the data submission and station status (e.g. extension of the measurement programme). If this is not done, the station is moved to the non-active category.

There are three types of stations identified in the GAW Strategic Plan 2008-2015 (section 3 “Observing systems”): GAW Global, GAW Regional and Contributing stations. Contributing stations are operated by contributing networks. All the stations should satisfy the essential characteristics listed below. 

Before submitting your application, please study these carefully to ensure that your station qualifies.  

Essential Characteristics of a GAW Regional or Contributing Station (GAW Strategic Plan 2008-2015, Box 9)

1. The station location is chosen such that, for the variables measured, it is regionally representative and is normally free of the influence of significant local pollution sources.

2. There are adequate power, air conditioning, communication and building facilities to sustain long term observations with greater than 90% data capture (i.e. <10% missing data).

3. The technical support provided is trained in the operation of the equipment.

4. There is a commitment by the responsible agency to long term observations of at least one of the GAW variables in the GAW focal areas (ozone, aerosols, greenhouse gases, reactive gases, UV radiation, precipitation chemistry).

5. The GAW observation made is of known quality and linked to the GAW Primary Standard.

6. The data and associated metadata are submitted to one of the GAW World Data Centres no later than one year after the observation is made. Changes of metadata including instrumentation, traceability, observation procedures, are reported to the responsible WDC in a timely manner.

7. If required, data are submitted to a designated data distribution system in near-real-time.

8. Standard meteorological in situ observations, necessary for the accurate determination and interpretation of the GAW variables, are made with known accuracy and precision.

9. The station characteristics and observational programme are updated in the GAW Station Information System (GAWSIS) on a regular basis.

10. A station logbook (i.e. record of observations made and activities that may affect observations) is maintained and is used in the data validation process.

Additional Essential Characteristics Needed for a GAW Global Station (Box 10)

In addition to the characteristics of Regional or Contributing stations, a GAW Global station should fulfill the following additional requirements, namely

11. Measure variables in at least three of the six GAW focal areas (see item 4 above).

12. Have a strong scientific supporting programme with appropriate data analysis and interpretation within the country and, if possible, the support of more than one agency.

13. Make measurements of other atmospheric variables important to weather and climate including upper air radio sondes at the site or in the region.

14. Provide a facility at which intensive campaign research can augment the long term routine GAW observations and where testing and development of new GAW methods can be undertaken.





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