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Data Set ID: 
NSIDC-0727

MEaSUREs Greenland Quarterly Ice Sheet Velocity Mosaics from SAR and Landsat, Version 1

This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, contains quarterly (three-month interval) ice velocity mosaics for the Greenland Ice Sheet. This product is derived from Synthetic Aperture Radar (SAR) data obtained by the German Aerospace Center's (DLR) TerraSAR-X/TanDEM-X (TSX/TDX), by the European Space Agency's (ESA) Copernicus Sentinel-1A and -1B satellites, and from the US Geological Survey's (USGS) Landsat 8 optical imagery.

See Greenland Ice Mapping Project (GIMP) for related data.

There is a more recent version of these data.

Version Summary: 

Initial release

COMPREHENSIVE Level of Service

Data: Data integrity and usability verified; data customization services available for select data

Documentation: Key metadata and comprehensive user guide available

User Support: Assistance with data access and usage; guidance on use of data in tools and data customization services

See All Level of Service Details

Parameter(s):
  • SNOW/ICE > ICE VELOCITY
Data Format(s):
  • GeoTIFF
  • JPEG
  • Shapefile
Spatial Coverage:
N: 83, 
S: 60, 
E: -14, 
W: -75
Platform(s):LANDSAT-8, SENTINEL-1A, SENTINEL-1B, TDX, TSX
Spatial Resolution:
  • 200 m x 200 m
Sensor(s):C-SAR, OLI, X-SAR
Temporal Coverage:
  • 1 December 2014 to 30 November 2018
(updated 2019)		Version(s):V1
Temporal Resolution3 monthMetadata XML:View Metadata Record
Data Contributor(s):Ian Joughin

Geographic Coverage

Download Via HTTPS: An Earthdata Login account is required to access these data.

Once you have logged in, you will be able to click and download files via a Web browser. There are also options for downloading via a command line or client. For more detailed instructions, please see Options Available for Bulk Downloading Data from HTTPS with Earthdata Login.

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Joughin, I. 2018, updated 2019. MEaSUREs Greenland Quarterly Ice Sheet Velocity Mosaics from SAR and Landsat, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/1Q1AM4U8Y892. [Date Accessed].

Literature Citation

As a condition of using these data, we request that you acknowledge the author(s) of this data set by referencing the following peer-reviewed publication.

  • Joughin, I., B. Smith, I. Howat, T. Scambos, and T. Moon. 2010. Greenland flow variability from ice-sheet-wide velocity mapping, Journal of Glaciology. 56. 415-430. https://doi.org/10.3189/002214310792447734

  • Joughin, I., B. Smith, and I. Howat. 2018. Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales, The Cryosphere. 12. 2211-2227. https://doi.org/10.5194/tc-12-2211-2018

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How To

Programmatic Data Access Guide
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 or through our Application Programming Interface (API). Our API offers you the ability to order data using specific temporal and spatial filters... read more
How do I reproject a geoTIFF from polar stereographic to geographic lat/lon?
We recommend using the Geospatial Data Abstraction Library (GDAL) or a GIS to reproject geoTIFF files. Here we outline command line or python options for using GDAL, and instructions for QGIS and ArcMap to... read more
How do I convert a GeoTIFF into a NetCDF file?
We recommend using the Geospatial Data Abstraction Library (GDAL) to convert GeoTIFF files into a different format. If you want to reproject to lat/lon as well, then we recommend reprojecting before converting to NetCDF (see the FAQ "How do I reproject a GeoTIFF to from polar steroegraphic to... read more
How to spatially subset and visualize MEaSUREs GIMP image and velocity products
There are external Jupyter notebooks available that can be used to download user-defined spatial subsets of the following MEaSUREs GIMP products: MEaSUREs Greenland Annual Ice Sheet Velocity Mosaics from SAR and Landsat... read more
How to build a QGIS project with MEaSUREs GIMP image and velocity products
There are external Jupyter notebooks available that can be used to search for GIMP products and incorporate them into a new QGIS project: MEaSUREs Greenland Annual Ice Sheet Velocity Mosaics from SAR and Landsat... read more

FAQ

Do you have sample code to read GeoTiffs?
The answer is yes. Below the image in this article, you will find  sample code in IDL, MATLAB, and Python to read in a GeoTIFF file, extract the metadata, and create an image. The code has been tested with data from: MEaSUREs Greenland Ice Sheet Velocity Mosaics SAR and Landsat, Version 1 (NSIDC-... read more
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NSIDC User Services
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Email: nsidc@nsidc.org