Install Processing from processing.org and download nsidc_NH_SH_nt_final_and_nrt.txt.gz from https://sites.google.com/site/arctischepinguin/home/sea-ice-extent-area/data
Install Processing from processing.org and download nsidc_NH_SH_nt_final_and_nrt.txt.gz from https://sites.google.com/site/arctischepinguin/home/sea-ice-extent-area/data