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由于FY4A数据中空间信息缺失,需要根据数据实际情况在脚本中补充。FY卫星圆盘数据是Geostationay satellite投影,在此投影的的数据网格是矩形,x, y坐标单位是米。这个数据的分辨率是4km (4000m),数据网格中心坐标是(0, 0),x方向格点数是2748,那么x方向的总长度是2748*4000,再除以2就可以得到x方向坐标起始和结束值为(-5496000.0,5496000.0)。
fn = 'D:/Temp/FY/FY4A-_AGRI--_N_DISK_1047E_L2-_CTT-_MULT_NOM_20190209140000_20190209141459_4000M_V0001.NC' f = addfile(fn) x = linspace(-5496000.0,5496000.0, 2748) y = linspace(-5496000.0,5496000.0, 2748) data = f['CTT'][::-1,:] data[data>1000] = nan data[data==-999] = nan height = f['nominal_satellite_height'][:] #Plot lon0 = 104.7 ax = axesm(proj='geos', lon_0=lon0, h=height, gridlabelloc='all', griddx=30, griddy=30, gridline=True, frameon=False) geoshow('coastline', color='k') levs = arange(160, 311, 5) layer = imshow(x, y, data, levs, proj=ax.proj) colorbar(layer, shrink=0.8, xshift=15) title('FY4A Cloud Top Temperature') #savefig('D:/Temp/figure/fy4a_ctt.png', 500, 400, dpi=300)
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