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Dear Sean:

Thanks for your reply,I relearned the code,and have solved this problem:wink:

think you very much!
Liu

Hello everyone:I recently have trouble in polarization correction. I hope someone can help me:confused:I want to calculate the polarization correction factor from this equation:Pc=1/[1-m12*(cos2a*Qt+sin2a*Ut)/Im-m13*(cos2a*Ut-sin2a*Qt)/Im]I am trying to get m12 and m13 from xcal LUT for modisa,but u...