Dr. Casey presented a seminar titled “Geostationary Hyper-Spectral Sounder (Geo-HSS) Constellation: A Global Observing System Simulation Experiment (OSSE) Assessment”.
Observing System Simulation Experiments (OSSEs) can provide quantitative assessments of potential impacts of new observation sources, without the instrument actually being built in some cases. This presentation describes the set-up of global-scale OSSEs, from the use of a 7-km “Nature Run” taken as truth to the use of an operational Global Forecast System (GFS) model to assess analysis/forecast experiments. Experimental results for a test involving five geostationary satellites carrying Infrared Atmospheric Sounding Interferometer (IASI) instruments are presented, along with description of methods to improve representativeness of analysis/forecast impacts given less-than-ideal experimental conditions.
A recording of the presentation is available on the anonymous ftp site: ftp://ftp.aoml.noaa.gov/hrd/pub/blog/seminars/2018/Casey_HRD_seminar_20180215.mp4