Does NSIDC have tools for geolocating and displaying EASE-Grid data sets?

NSIDC provides software and tools for geolocating and displaying EASE-Grid data sets at NSIDC. This article provides links to software and tools for geolocating and displaying EASE-Grid projection data sets available at NSIDC. All tools are available through the NSIDC Github.

The software and tools are grouped into the following categories:

  • Geolocation Software: IDL (Interactive Data Language) conversion software
  • Geolocation Data Files: Ancillary grid files provide arrays of the latitude and longitude at the center of each grid cell 

Geolocation Software

Tool Name easeconv.pro
Tool Type IDL
Description This program, currently at Version 0.3, contains routines to convert between latitude/longitude and row/column coordinates for both EASE-Grid and EASE-Grid 2.0.
Access Via Github
Applicable Data Sets AARI 10-Day Arctic Ocean EASE-Grid Sea Ice Observations
AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures
AMSR-E/Aqua Daily L3 Global Snow Water Equivalent EASE-Grids
AMSR-E/Aqua 5-Day L3 Global Snow Water Equivalent EASE-Grids
AMSR-E/Aqua Monthly L3 Global Snow Water Equivalent EASE-Grids
AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive Parms, & QC EASE-Grids
Nimbus-7 SMMR Pathfinder Daily EASE-Grid Brightness Temperatures
DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures
Global Monthly EASE-Grid Snow Water Equivalent Climatology
Near-Real-Time SSM/I EASE-Grid Daily Global Ice Concentration and Snow Extent
Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 4
TOVS Pathfinder Path-P Daily and Monthly Polar Gridded Atmospheric Parameters
SMAP L1C Radiometer Half-Orbit 36 km EASE-Grid Brightness Temperatures (SPL1CTB)
SMAP Enhanced L1C Radiometer Half-Orbit 9 km EASE-Grid Brightness Temperatures (SPL1CTB_E)
SMAP L2 Radar Half-Orbit 3 km EASE-Grid Soil Moisture (SPL2SMA)
SMAP L2 Radar/Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture (SPL2SMAP)
SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture (SPL2SMP)
SMAP Enhanced L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture (SPL2SMP_E)
SMAP L3 Radar Northern Hemisphere Daily 3 km EASE-Grid Freeze/Thaw State (SPL3FTA)
SMAP L3 Radiometer Northern Hemisphere Daily 36 km EASE-Grid Freeze/Thaw State (SPL3FTP)
SMAP Enhanced L3 Radiometer Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State (SPL3FTP_E)
SMAP L3 Radar Global Daily 3 km EASE-Grid Soil Moisture (SPL3SMA)
SMAP L3 Radar/Radiometer Global Daily 9 km EASE-Grid Soil Moisture (SPL3SMAP)
SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture (SPL3SMP)
SMAP Enhanced L3 Radiometer Global Daily 9 km EASE-Grid Soil Moisture (SPL3SMP_E)
SMAP L4 Global Daily 9 km Carbon Net Ecosystem Exchange (SPL4CMDL)
SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update (SPL4SMAU)
SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data (SPL4SMGP)
SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants (SPL4SMLM)

Geolocation Data Files 

For data set users who need the latitude and longitude of the center of any cell in the grid, the following geolocation data file is available.

Tool Name
EASE Grids Ancillary Grid Information
Tool Type Geolocation Data Files
Description

EASE-Grids 2.0 provide arrays of the latitude and longitude at the center of each grid cell. New products use the EASE-Grid 2.0, but many existing data sets still use the original EASE-Grids.

Grid Name EASE2_N, EASE2_S, EASE2_M, EASE2_T, EASE_M, EASE_N, EASE_S
Coverage North, South, Global
Resolultion Varies
Dimensions Varies
Access Via HTTPS
Applicable Data Sets
SMAP L1C Radiometer Half-Orbit 36 km EASE-Grid Brightness Temperatures (SPL1CTB)
SMAP Enhanced L1C Radiometer Half-Orbit 9 km EASE-Grid Brightness Temperatures (SPL1CTB_E)
SMAP L2 Radar Half-Orbit 3 km EASE-Grid Soil Moisture (SPL2SMA)
SMAP L2 Radar/Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture (SPL2SMAP)
SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture (SPL2SMP)
SMAP Enhanced L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture (SPL2SMP_E)
SMAP L3 Radar Northern Hemisphere Daily 3 km EASE-Grid Freeze/Thaw State (SPL3FTA)
SMAP L3 Radiometer Northern Hemisphere Daily 36 km EASE-Grid Freeze/Thaw State (SPL3FTP)
SMAP Enhanced L3 Radiometer Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State (SPL3FTP_E)
SMAP L3 Radar Global Daily 3 km EASE-Grid Soil Moisture (SPL3SMA)
SMAP L3 Radar/Radiometer Global Daily 9 km EASE-Grid Soil Moisture (SPL3SMAP)
SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture (SPL3SMP)
SMAP Enhanced L3 Radiometer Global Daily 9 km EASE-Grid Soil Moisture (SPL3SMP_E)
SMAP L4 Global Daily 9 km Carbon Net Ecosystem Exchange (SPL4CMDL)
SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update (SPL4SMAU)
SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data (SPL4SMGP)
SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants (SPL4SMLM)
Tool Names NAARILATooo and NAARILONooo
Tool Type Geolocation Data Files
Description Provides latitude and longitude for the center of any cell in the grid. For additional details, please refer to the Geolocation Data Files section of this Web page.
Grid Name NAARI
Coverage Subset of the Northern Hemisphere
Resolution 25 km
Dimensions 721 x 721 pixels
Access FTP
Applicable Data Sets AARI 10-Day Arctic Ocean EASE-Grid Sea Ice Observations

Additional Tools for EASE-Grid

Geolocating EASE-Grid Data in ENVI

The Geolocating EASE-Grid Data in ENVI document describes how to geolocate North, South, and Global EASE-Grid data from the DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures product using ENVI Software.