J7.4 Geostationary Hyperspectral Infrared Constellation: Global Observing System Simulation Experiments for five Geo-HSS instruments

Tuesday, 12 January 2016: 4:15 PM
Room 345 ( New Orleans Ernest N. Morial Convention Center)
Sean P. F. Casey, JCSDA/Earth System Science Interdisciplinary Center, College Park, MD; and R. Atlas, S. A. Boukabara, R. N. Hoffman, K. Ide, M. Masutani, I. Moradi, and J. S. Woollen

While individual geostationary satellites can be highly beneficial for regional weather analyses and forecasts, their impact on global medium-range weather forecasts is limited. This study aims to use Observing System Simulation Experiments (OSSEs) to determine whether multiple geostationary satellites, placed around the equator, would have a noticeable global impact. In these OSSEs, observations are simulated from the GMAO 5-km Nature Run (G5NR), based on the observing system from 2014, degraded into a data-gap scenario with no early-afternoon orbiting satellites (2POLAR). Biases and random-errors determined from comparison to real observations are added. Then, simulated observations from geostationary Infrared Atmospheric Sounding Interferometer (IASI) instruments from five longitudes (0°, 60°, 140°, 225°, and 285°E) are assimilated into the NCEP GDAS/GFS 3D Hybrid system at T670/T254 resolution. Analysis and forecast impacts of this “Constellation” of Geo-HyperSpectral Sounders (Geo-HSS) will be discussed.
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