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 Troposphere
ACRI-ST
studies:
- Airborne
Radio Occultation studies:
- ACRI-ST, on the behalf of ESA, led
the consortium for a first feasibility study of the airborne
occultation technique (ARO project), with
IEEC (Barcelona) and IGAM (University of Graz). This technique
allows the sounding of the atmosphere by using GPS radio
signals that cross the atmosphere as the moving transmitter
(GPS satellite) sets behind the atmosphere. For this study
ACRI-ST has used extensively the EGOPS End to End Radio
Occultation Simulator to investigate atmospheric effects
on radio occultation retrieval performance.
- ACRI-ST participated in the follow-up study on the behalf
of EUROCONTROL for planning a proof-of-concept experiment
with the UK Met Office (England) and QinetiQ (England).
ACRI-ST provided expertise, through simulations, for the
avionics engineering company DERA to design the optimum
technological solution for the measurements.
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Ground
Based GPS studies of atmospheric water vapour:
- ACRI-ST led the European Commission project MAGIC
(Meteorological Applications of GPS Integrated Column Water
Vapor Measurements in the Western Mediterranean). MAGIC
is a cooperative effort to improve weather prediction and
climate models in the Western Mediterranean by deriving
new measurements of atmospheric humidity from Global Positioning
System network data. More than 30 GPS receiver sites were
co-ordinated to supply an integrated data stream for the
end meteorologist users.
http://www.acri-st.fr/magic
- ACRI-ST participated
in the working group of the European COST 716 project
concerning the exploitation of ground based GPS for climate
and Numerical Weather Prediction (NWP) applications. In
this project, ACRI-ST was one of the center processing GPS
data in near real time. ACRI-ST also participated in the
working group for assimilation tests of ground based GPS
data into NWP models.
http://www.oso.chalmers.se/geo/cost716.html/
- ACRI-ST participates
in the European TOUGH project aimed at developing
and refining methods enabling the use of Global Positioning
System (GPS) data from existing European GPS stations in
numerical weather prediction models, and to assess the impact
of such data upon the quality of weather forecasts. In this
project, ACRI-ST processes in near real time the data from
the French GPS stations and thus provides integrated water
vapor measurements.
http://tough.dmi.dk/
http://www.acri-st.fr/tough
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