Name: MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Night, Version 6
Creator: National Snow and Ice Data Center
Keywords: ICE TEMPERATURE

MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Night, Version 6

Data set id:

MOD29P1N

DOI: 10.5067/MODIS/MOD29P1N.006

Data Citation and Acknowledgment
As a condition of using these data, you must cite the use of this data set. Such a practice gives credit to data set producers and advances principles of transparency and reproducibility.

Hall, D. K. & Riggs, G. A. (2015). MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Night. (MOD29P1N, Version 6). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD29P1N.006. [describe subset used if applicable]. Date Accessed 09-24-2025.

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There is a more recent version of these data.
Version Summary

Sea ice extent and ice surface temperature algorithms and data sets are the same as Version 5. However, revisions and improvements for Version 6 to algorithm inputs have improved sea ice outputs as follows:

Revised calibration of MOD02 thermal bands 31 and 32 decreased calculated brightness temperatures by about -0.01 K and improved accuracy for very cold scenes;

The Version 6 land/water mask in the MOD03 geolocation product increased the accuracy of water body and coastline maps;

Revisions to the MOD35_L2 cloud mask algorithm have increased the accuracy of cloud detection.

Overview

MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Night (MOD29P1N) data set contains tiles of daily 1 km resolution nighttime ice surface temperatures and quality assessment data, gridded to the Equal Area Scalable Earth Grid (EASE-Grid). As of August 2023, this data set is retired and no longer available for download. We recommend using MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Night, Version 61 as an alternative.

Parameter(s):

ICE TEMPERATURE

Platform(s):

Terra

Sensor(s):

MODIS

Data Format(s):

XML

JPEG

HDF-EOS2

Temporal Coverage:

24 February 2000 to 17 February 2023

Temporal Resolution:

1 day

Spatial Resolution:

1 km

1 km

Spatial Reference System(s):

NSIDC EASE-Grid North
EPSG:3408
NSIDC EASE-Grid South
EPSG:3409

Spatial Coverage:

N:
90
S:
-90
E:
180
W:
-180

Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

View Metadata Record

Data Access & Tools

This data set has been retired. There is a more recent version of these data.

Documentation

User Guide

MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Night, Version 6 User Guide

General Resources

EASE-Grid Tile Locations and Bounding Coordinates for MODIS and VIIRS Sea Ice Products

Help Articles

General Questions & FAQs

Can I merge different MODIS collections?

For the snow cover and sea ice products, users can use MODIS Collections 6 and 6.1 together.

This article covers frequently asked questions about the NASA NSIDC DAAC's Earthdata cloud migration project and what it means to data users.

Data products from VIIRS are created to be similar to MODIS data products to ensure the continuity needed for the development of snow and sea ice climate records beyond the life expectancy of MODIS. The temporal resolution and spatial extent are identical in MODIS and VIIRS.

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.

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is migrating its primary data access from its legacy, on-premises archive to the NASA Earthdata Cloud.

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 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:

To convert HDF5 files into binary format you will need to use the h5dump utility, which is part of the HDF5 distribution available from the HDF Group. How you install HDF5 depends on your operating system.

NASA Earthdata Cloud Data Access Guide

The NASA Earthdata Cloud is the NASA cloud-based archive of Earth observations. It is hosted by Amazon Web Services (AWS). Learn how to find and access NSIDC DAAC data directly in the cloud.

Programmatic Data Access Guide

All data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is directly accessible through our HTTPS file system using Wget or curl. This article provides basic command line instructions for accessing data using this method.

This article highlights the NSIDC DAAC data sets available with customization options and outlines a workflow for searching, ordering, and customizing data in NASA Earthdata Search. This approach is ideal for users who want to download data to their local machine.

NASA Worldview is a map interface that allows users to interactively browse imagery, create visualizations, and download the underlying data.

NASA's Global Imagery Browse Services (GIBS) provides up to date, full resolution imagery for selected NSIDC DAAC data sets.