• The Terra satellite successfully completed its Constellation Exit Maneuvers (CEM) on October 12 and 19, 2022. The instruments have since returned to a nominal state and data processing and distribution resumed as of October 24. Please note that there is a gap in coverage between October 10, 2022 and October 23, 2022 during which the satellite exercises and subsequent stabilization and Post-CEM calibrations took place.

     

    Please note that the CEM does not indicate the end of life for the Terra mission, but it does represent a change in orbital positioning. Users who are interested in knowing more about the Terra morning constellation exit can refer to this note.

     

  • MODIS Collection 6.1 has been fully reprocessed and temporal coverage is now complete. MODIS Collection 6.0 data sets will be processed continuously through the end of 2022. Data for C6.0 will likely remain available for just a few months thereafter.

MODIS/Terra Sea Ice Extent and IST Daily L3 Global 4km EASE-Grid Day, Version 61 (MOD29E1D)
Data set:
MOD29E1D
User Guide
Citation
Subscribe
Service
This is the most recent version of these data.
Version Summary
This C61 product is identical in format to the C6 version. The C61 reprocessing does not contain any change to the science algorithm used to generate this product. Any improvement or change in the C61 product compared to the C6 product is from changes and enhancements to the calibration approach used to generate the input products and changes to the polarization correction used in this collection reprocessing..

Overview

This global Level-3 (L3) data set provides Northern and Southern Hemisphere maps of sea ice extent and ice surface temperature. The maps are generated by compositing 1 km observations from the 'MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Day’ (https://doi.org/10.5067/MODIS/MOD29P1D.061) product. These data are provided daily in the EASE-Grid polar projection at a resolution of approximately 4 km. The terms "Version 61" and "Collection 6.1" are used interchangeably in reference to this release of MODIS data.
Parameter(s):
ICE EXTENT ICE TEMPERATURE
Platform(s):
Terra
Sensor(s):
MODIS
Data Format(s):
HDF-EOS2
Temporal Coverage:
24 February 2000 to present
Temporal Resolution:
1 day
Spatial Resolution:
4 km
4 km
Spatial Coverage:
N:
90
S:
-90
E:
180
W:
-180

Data Access & Tools

A free NASA Earthdata Login account is required to access these data. Learn More

HTTPS File System

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

Data Access Tool

Search & Discover
Get Data
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.
Filter and order from a data set web page
Type: Web Application
Last updated:

NASA Earthdata Search

Visualize
Search & Discover
Get Data
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

Customized Programmatic Data Access Service

Get Data
Customize
Programmatically request selected data products through our API. This tool is valuable for selecting just the parameters you need from big data sets. Apply spatial and temporal filters, subsetting, reformatting, and reprojection.
Programmatic Data Access Guide
Type:
service
Last updated:
Customization Capabilities:
data reformatting
reprojection
spatial subsetting
variable subsetting
Interpolation Options:
Bicubic Interpolation
Bilinear Interpolation
Nearest Neighbor
Output Projections:
Geographic
Universal Transverse Mercator
Polar Stereographic
Sinusoidal
Plate Carree
Output Formats:
HDF-EOS
GEOTIFF
HDF-EOS
 

Data Subscription and Customization Service

Get Data
Customize
Sign up for automatic delivery of new data from active NASA satellite missions. Customize data with reformatting, reprojection, and subsetting if desired.
Data Subscription Service Guide
Type:
service
Last updated:
Customization Capabilities:
data reformatting
reprojection
spatial subsetting
variable subsetting
 

HDF-EOS Code Examples

Visualize
Get Data
Use example Python, MATLAB, IDL, or NCL code to import, read, and/or visualize select NSIDC DAAC data products.
Supported software languages:
MATLAB
Python
IDL
Type: Downloadable Software

HDFView

Visualize
Explore contents of HDF4 and HDF5 files, including file structure, metadata, and parameter values.
HDFView 3.X User's Guide
Type: Downloadable Software
Output Formats:
ASCII
HDF4
HDF5

NASA LaRC Satellite Overpass Predictor

Visualize
Calculate past and future satellite overpasses, based on latitude/longitude or map location.
Type: Web Application

Panoply Data Viewer

Visualize
Analyze
Visualize georeferenced arrays in NetCDF, HDF and GRIB formats. Plot data on global or regional maps, choosing from multiple map projections. Overlay continent outlines or masks.
Type: Downloadable Software
Output Formats:
ASCII
CSV
GIF
HDF-EOS2
HDF-EOS5
HDF4
HDF5
JPEG
KML
NETCDF-3
NETCDF-4
PNG
TIFF

Documentation

Help Articles

Getting started

Can I merge different MODIS collections?
For the snow cover and sea ice products, users can use MODIS Collections 6 and 6.1 together.
Read More
Missing and delayed MODIS data
The lag time between observations and availability of MODIS products is only a few days. Lag time may be extended due to satellite maneuvers and extra quality assurance required for the geolocation data after the maneuver.
Read More
What data subsetting, reformatting, and reprojection services are available for MODIS data?
This short article describes the customization services available for ICESat-2 data using Earthdata Search
Read More

How To

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
NSIDC DAAC Data Subscription Requests
Data subscriptions are available for select NSIDC DAAC data collections. Once signed up, the subscription service automatically sends you new data as they are delivered from active NASA satellite missions.
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. 
Read More
Search, order, and customize NSIDC DAAC data with NASA Earthdata Search
NASA Earthdata Search is a map-based interface where a user can search for Earth science data, filter results based on spatial and temporal constraints, and order data with customizations including re-formatting, re-projecting, and spatial and parameter subsetting.
Read More
In this section
  • Rendering Links ...
  • Rendering Links ...