Association of Polar Early Career Scientists


The NASA MEaSUREs ITS_LIVE scene-pair velocity data set is now available online at NASA Jet Propulsion Laboratory, with a new tool for rapidly selecting and filtering the data. This new data set consists of single-pair image-correlation-based ice flow velocities generated from the entire Landsat 4, 5, 7 & 8 archive. The 8 million individual scene-pairs cover all the permanent ice-covered areas larger than 5 km2, globally. It spans 1984 to early 2019 and has a spatial resolution of 240m. Regular updates to near-real-time (~1 to 2 months latency) are planned before the end of the year.

The new selection tool allows users to quickly search for available scene-pairs in any glaciered area, and to filter the results based on the fraction of coverage, image pair time-span, and temporal range. Access to the data is provided through a web application hosted at the National Snow and Ice Data Center (NSIDC):

This data set is produced under the Inter-Mission Time Series of Land Ice Velocity and Elevation (ITS_LIVE) project, part of NASA’s Making Earth System Data Records for Use in Research Environments (MEaSUREs) 2017 program. The ITS_LIVE project provides global low-latency measurements of glacier and ice sheet surface velocity and elevation change at high temporal resolution. 

Additional documentation is provided through the project web page at the NASA Jet Propulsion Laboratory:

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