MeteoInfoLab脚本示例：FY-3A AOD HDF数据

FY3A卫星有HDF格式的AOD产品数据，全球范围，分辨率为0.05度。读取数据文件变量后要重新设定X/Y维，数据是Y轴反向的，且需要除以10000得到AOD值。

脚本程序：

#Add data file
fn = 'D:/Temp/hdf/FY3A_MERSI_GBAL_L3_ASL_MLT_GLL_20140331_AOAM_5000M_MS.HDF'
f = addfile(fn)
#Get data variable
v = f['Aerosol_Optical_Thickness_of_MERSI_550nm']
#Set x/y
x = arange1(-30.0,7200, 0.05)
y = arange1(-90.0,3600, 0.05)
#Set x/y dimensions
v.setdim('Y', y, 0)
v.setdim('X', x, 1)
#Get data array
aod = v[:,:]
#aod = v[[15, 55],[70, 140]]
aod = aod[::-1,:] / 10000.
aod = aod[[15, 55],[70, 140]]
#Plot
axesm()
world = shaperead('D:/Temp/map/country1.shp')
china = shaperead('D:/Temp/map/bou2_4p.shp')
geoshow(china, edgecolor='gray')
geoshow(world)
levs = arange1(0, 20, 0.05)
cols = makecolors(21, cmap='matlab_jet')
cols[0] = 'w'
layer = imshowm(aod, levs, colors=cols)
colorbar(layer)
title('FY-3A AOD (2014-03-31)')