Improved simulation of Doppler velocity for Cloud Profiling Radar on EarthCARE

EarthCARE is joint mission between Japan and Europe, and it will be launched on 2015. Cloud Profiling Radar is one of key sensors on EarthCARE, which is W-band Doppler radar. CPR is the first Doppler radar from space to observe cloud and precipitation, which can be measure Doppler velocity in addition to reflectivity. There are some proposed simulation methods, and we also proposed the simulation method to calculate summation from each distributed target for hit by hit. The result is quite satisfied, but it takes much time for the calculation. One reason of this is to calculate 2-dimentional integration, which is coded by MATLAB. So in order to decrease calculation time, we changed integration method and to use lower level language such as C and/or Fortran. Then the calculation time is improved. Both result using SPIDER data, which is aiborne cloud radar, are compared.