Results in this poster will investigate the scenario of having one (NOAA-15) and two (NOAA-15 and NOAA-16) of the NOAA polar orbiting satellites fail. A primary goal is to determine how detrimental such a failure would be to NCEP's operational weather forecast quality. The removal experiment includes eliminating NOAA-15 AMSU data and NOAA-16 AMSU and HIRS data from the operational stream during 45 day time periods of each extreme season. NOAA-17 remains on in both experiments.
Results demonstrate that the day 0-7 anomaly correlations are substantially better in the extratropics of each hemisphere with the inclusion of all three NOAA satellites. In fact, a nearly linear decrease in anomaly correlation is noticed for each satellite removed. A second very apparent benefit of including data from three NOAA satellites is a more accurate tropical cyclone prediction. For the time periods investigated, the forecasted tropical cyclone position was more accurately reproduced 75% of the time with data from three NOAA satellites. These positive impacts from multiple NOAA satellites are shown even when including the full complement of other satellite and non-satellite based observations.