Need to warp AWHRR files so that the resulting grid mesh cells borders coincide for all the scenes. I'm using the following code for warping (in cycle for every file): ; setting projection units = envi_proj_units_translate('Degrees') proj = envi_proj_create(/geographic, unit=units) ENVI_DOIT, 'ENVI_AVHRR_WARP_DOIT', AVHRR_FID=fidin, $ DIMS=dims, FID=fidcal, /IN_MEMORY, BACKGROUND=nodata, $ METHOD=8, OUT_BNAME=[0,1,2,3,4], POS=pos, $ PIXEL_SIZE=[0.02, 0.02], grid=[50,50], PROJ=proj, R_FID=fidproj How I must to set up projection so that ENVI_AVHRR_WARP_DOIT will warp different scenes uniformly (avoiding grid borders mismatching)? (I want to warp/reproject the data only ones in order to not degrade my data.)