The Analysis Of Terrain Data Refinement Effect On Numerical Prediction

China's civil aviation technology has been rapid development, the modem aviation safety is more influenced by the meteorological factors(such as low-level wind shear, etc.), which raise higher requirements to the aviation weather forecasting and warning department.Numerical model forecasts technology is currently an effective method to solve the problem of inadequate meteorological equipment and low prediction accuracy,and provide a strong guarantee for the Air Traffic Control, Operation Control and other office departments. New generation of WRF mesoscale models(research and forecast model) in recent years has been the rapid development and promotion, which has become a regular operation, and an indispensable tool for numerical simulation of scientific research.Examines conditions for complex terrain wind field low-precision small-scale simulation has be done in this paper. First, the accuracy of NASA and the National Mapping Agency(NIMA) of the joint provision of 90 m SRTM(Shuttle Radar Topography Mission) digital elevation mode high accuracy elevation data digital(DEM) held void fill region has be done by the WPSGeoTiff, GIS technology, and replace it into the WRF; Then the test of the sensitivity WRF(to March 9, 2013 occurred in the region of windy weather Beijing, for example) has be done, while the same schemes of microphysics, the solution of the boundary layer, the horizontal resolution and other program parameters, benchmarking USGS with SRTM data and the impact on the simulation results; The use of automatic observation stations Micaps data packets aviation weather forecast data routine(METAR) and other observations, a comparative analysis between the two sets of data and also the simulation and live, and found the effect of using SRTM data; Finally, choose the closest simulation results and live with the special ability of his low level of diagnostic analysis, research and analysis of the wind field changes with time diagnostic information on the development, distribution and the intensity of size for the safe operation of aircraft to provide accurate information and effective meteorological service.