CryoSat-2 Level-4 Sea Ice Elevation, Freeboard, and Thickness, Version 1
Data set id:
RDEFT4
DOI: 10.5067/96JO0KIFDAS8
This is the most recent version of these data.
Version Summary
Initial release
In this section
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Overview

This data set contains estimates of Arctic sea ice thickness and concentration, ice freeboard and surface roughness, as well as snow density and depth, derived from the ESA CryoSat-2 Synthetic Aperture Interferometric Radar Altimeter (SIRAL). The data are provided daily on a 25 km grid as 30-day averages for the months between September and May.
Parameter(s):
FREEBOARDICE DEPTH/THICKNESSICE ROUGHNESSSEA ICE CONCENTRATIONSNOW DENSITYSNOW DEPTH
Platform(s):
CRYOSAT-2, DMSP 5D-3/F17
Sensor(s):
SIRAL, SSMIS
Data Format(s):
PNG, NetCDF
Temporal Coverage:
20 September 2010 to present
Temporal Resolution:
  • 30 day
Spatial Resolution:
  • 25 km
  • 25 km
Spatial Reference System(s):
WGS 84 / NSIDC Sea Ice Polar Stereographic North
EPSG:3413
Spatial Coverage:
N:
90
S:
55
E:
180
W:
-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

Data Access & Tools

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HTTPS File System

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Quickly download a few files using a web browser, or access data through a command-line utility such as WGET.
Programmatic Data Access Guide
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service
Last updated:
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Data Access Tool

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Filter files before downloading based on date, spatial area, or file name. Choose from various download options, such as Python script. Export bounding boxes as a GeoJSON.
How to filter and order from a data set web page
Type: Web Application
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Operation IceBridge Data Portal

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Search, visualize, and download data from NSIDC's long-term IceBridge archive. The portal provides flight lines, map-based granule extents, browse images (where available), Northern and Southern Hemisphere polar views, spatial and temporal filters, and keyword search options.
Updates to NSIDC Operation IceBridge Data Portal
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Search and order data from all NASA DAACs using spatial and temporal filters in a map interface. Reformatting, reprojecting, and subsetting options are available for some data sets.
How to search, order, and customize data with NASA Earthdata Search
Type: Web Application

earthaccess

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earthaccess is a python library to search and access NASA Earth science data with just a few lines of code.
Supported software languages:
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GitHub Repository
Type: Downloadable Software
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Bulk Programmatic Data Access Service

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Programmatically request selected data products through NSIDC's API. Bulk download using spatial and temporal filters, or incorporate data access commands into code/scripts as needed.
Programmatic Data Access Guide
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service
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HDFView

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Explore contents of HDF4 and HDF5 files, including file structure, metadata, and parameter values.
HDFView 3.X User's Guide
Type: Downloadable Software
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HDF4
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Output Formats:
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CSV
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HDF-EOS2
HDF-EOS5
HDF4
HDF5
JPEG
KML
NETCDF-3
NETCDF-4
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Documentation

Help Articles

How to Articles

Filter and order from a data set web page using the Data Access Tool
Many NSIDC DAAC data sets can be accessed using the NSIDC DAAC's Data Access Tool. This tool provides the ability to search and filter data with spatial and temporal constraints using a map-based interface.Users have the option to
Read More
Programmatic Data Access Guide
All data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) can be accessed directly from our HTTPS file system, using wget or curl. Basic command line instructions are provided in the article below. 
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