how to make rayleigh correctting? my method is based Seadas rayleigh scattering look-up table。using this method , i have to need header file and Sensor azimuth angle,Sensor zenith angle ,solar azimuth angle ,solar zenith angle of AVHRR .SF file and i need to creat map info for data,but i cant acquire this file by IDL program except zenith angle。so,please help me ,thanks