I have a multiband (1140) raster file in tiff format that I want to subset. Each band represents a prediction of monthly rainfall (12 bands for each year) over a 95 year period (12*95=1140). I need to subset the raster dataset into 10 year increments (120 bands), but cannot figure out how to do this with a multiband file. The output file would simply be a subset of the original raster dataset.
Do I first need to separate into individual bands? I have found a way to create a composite multiband raster file from individual bands (http://resources.arcgis.com/en/help/main/10.1/index.html#//00170000009p000000), but have been unable to find a method for subsetting a multiband raster file in ArcGIS 10.1 for Desktop.