Downsampling by a factor of 3 appears not to be an option because this error: % NCDF_VARGET: Requested read is larger than data in dimension 0. Reducing COUNT to 615. % REBIN: Result dimensions must be integer factor of original dimensions % Execution halted at: NCDF_VARGET_SCALE 133 /Users/adam/work/bgps_pipeline/support/ncdf_varget_scale.pro occurs.