This is the most recent version of these data.
Version 2 includes data acquired from 2011-2016 from RADARSAT-2, Sentinel-1, TerraSAR-X (TSX), and TanDEM-X (TDX). Landsat-8 optical imagery also was integrated into the data to improve coverage. The mosaicking method was updated to make best use of the large number of scenes used for the mosaic. In addition, several new parameters are included for assessing the quality of the data including: the standard deviation of vx and vy for each pixel and count of scenes used for each pixel.
In version 2, coverage increased from 95.1% to 99.6% and a reduction in error was achieved due to the utilization of more data.
This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides the first comprehensive, high-resolution, digital mosaics of ice motion in Antarctica assembled from multiple satellite interferometric, synthetic-aperture radar systems. Data were largely acquired during the International Polar Years 2007 to 2009, as well as between 2013 and 2016. Additional data acquired between 1996 and 2016 were used as needed to maximize coverage.
See Antarctic Ice Sheet Velocity and Mapping Data for related data.
This color-coded map shows a mosaic of ice velocity, in meters per year, across Antarctica. Highest velocities appear in magenta and red, intermediate velocities appear in blue and green, and lowest velocities appear in yellow and peach. Credit: NASA MEaSUREs AIV Data: CSA, ESA, NASA, USGS, JAXA
Many NSIDC data set web pages provide the ability to search and filter data with spatial and temporal contstraints using a map-based interface. This article outlines how to order NSIDC DAAC data using advanced searching and filtering.
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).