Mathematics – Logic
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.590..407b&link_type=abstract
In: 17th ESA Symposium on European Rocket and Balloon Programmes and Related Research, 30 May - 2 June 2005, Sandefjord, Norway.
Mathematics
Logic
Techniques, Instrumentation, Balloon, Trajectory, Forecasts, Ecmwf
Scientific paper
In the framework of the VASCO/CIRENE project, designed to investigate the ocean-atmosphere variability in the Indian Ocean from intra-seasonal to inter-annual times-scales, instrumented balloons are launched in the atmospheric boundary layer. Two types of balloons are used: small pressurized balloons designed to fly at a constant density level around 850hPa and Aéroclippers, a new aerostatic/buoying system that drifts approximately at an altitude of 50 meters. To forecast the trajectories of these vehicles and optimize their launching strategy, an original software has been developed. This software uses the ten-day forecasts produced twice a day by the European Centre for Medium-range Weather Forecasts (ECMWF). To evaluate the confidence of numerical trajectories and their previsibility, two strategies are implemented. The first one detects mostly the spatio-temporal phase errors in the meteorological forecast, while the second one detects the variability due to the uncertainty on the forecast initial state.
Basdevant C.
Duvel Jean-Philippe
Tromeur Eric
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