I am using Landsat MSS data downloaded from USGS website. The image has many bad line running from left to right, throughout the image. The lines are not exactly horzontal but slightly tilted. Could you please suggest me how to replace these lines by taking average of line above and below these bad lines. I am using Envi 4.5. I tried using replace bad line option but it asks for line number to be replaced. The problem is the bad lines keep on changing when we move from left to right. Any help in this would be highly appreciated. Thanks PK