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Derived Data Sets

Radarsat Antarctic Mapping Project (RAMP)

When scientists rotated the satellite RADARSAT in 1997 so its radar aimed south as it made passes over the South Pole, history was made. The resulting images from the mission’s synthetic aperture radar (SAR) yielded the first high-resolution mapping of Antarctica — a continent larger than the United States and Mexico combined.

Wetlands MEaSUREs – Monitoring Instruments

Spaceborne microwave remote sensing offers effective tools for characterizing wetlands, as microwave sensors are particularly sensitive to surface water and to vegetation structure, allowing monitoring of large, inaccessible areas on a temporal basis regardless of atmospheric conditions or solar illumination. Inundated wetlands can be consistently mapped and characterized with microwave remote sensing instruments, employed alone or in combination.

Global Ice Sheet Mapping Orbiter (GISMO)

GISMO Overview The Global Ice-Sheet Mapping Observatory (GISMO) spaceborne radar system was a part of the NASA Instrument Incubator Project (IIP). The IIP program was designed to provide a testing opportunity for emerging technology in order to create smaller and more efficient flight instruments. GISMO had a specific focus in measuring the surface topography of …

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Glacier Speed – About the Glacier-Flow-Speed Dataset

Download Data Glacier surface velocities were derived using ALOS PALSAR fine beam data (L-Band, HH Polarization, 46-day orbit interval) provided through ASF. Repeat image pairs, acquired within one- to two-orbit intervals, were used to measure the ground displacement of features on glacier surfaces, such as crevasses or Synthetic Aperture Radar (SAR) speckle. Ground displacement was measured using image …

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Glacier Speed

The first near-comprehensive dataset of wintertime glacier-flow speeds throughout Alaska — available here and described in Burgess et al., Nature Communications, 2013 — reveals complex patterns of glacier flow throughout the state. The findings significantly advance understanding of the mechanisms responsible for the rapid glacier mass loss occurring in Alaska.

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