| National Ice Center Arctic Sea Ice Charts and Climatologies in Gridded Format, Version 1 User Guide | User Guide | 2.48 MB |
| NCEP/NCAR Arctic Marine Rawinsonde Archive | User Guide | 238.35 KB |
| Near Real-Time MODIS/Terra L3 Global Daily 500m SIN Grid Snow Cover, Grain Size, and Dust Radiative Forcing, Version 1 Technical Reference | General Resources | 1.95 MB |
| Near-Real-Time DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 1 User Guide | User Guide | 134.87 KB |
| Near-Real-Time DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 2 | User Guide | 220 KB |
| Near-Real-Time DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures, Version 1 User Guide | User Guide | 116.43 KB |
| Near-Real-Time DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures, Version 2 User Guide | User Guide | 184.87 KB |
| Near-Real-Time DMSP SSMIS Daily Polar Gridded Sea Ice Concentrations, Version 1 User Guide | User Guide | 227.44 KB |
| Near-Real-Time DMSP SSMIS Daily Polar Gridded Sea Ice Concentrations, Version 2 User Guide | User Guide | 285.14 KB |
| Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration | User Guide | |
| Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 1 User Guide | User Guide | 549.24 KB |
| Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 2 User Guide | User Guide | 492.74 KB |
| Near-Real-Time SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent, Version 5 User Guide | User Guide | 723.93 KB |
| Nenana Ice Classic: Tanana River Ice Annual Breakup Dates, Version 2 User Guide | User Guide | 196.64 KB |
| Newall Glacier Snow Pit and Ice Core, 1987 to 1989, Version 1 User Guide | User Guide | 52.82 KB |
| Nimbus Advanced Vidicon Camera System Remapped Visible Imagery Daily L3, GeoTIFF, Version 1 User Guide | User Guide | 124.77 KB |
| Nimbus Advanced Vidicon Camera System Remapped Visible Imagery Daily L3, HDF5, Version 1 User Guide | User Guide | 210.67 KB |
| Nimbus Advanced Vidicon Camera System Visible Imagery L1, HDF5, Version 1 User Guide | User Guide | 348.71 KB |
| Nimbus High Resolution Infrared Radiometer Digital Swath Data L1, HDF5, Version 1 User Guide | User Guide | 197.67 KB |
| Nimbus High Resolution Infrared Radiometer Grayscale Swath Data L1, TIFF, Version 1 User Guide | User Guide | 243.09 KB |