IceBridge ATM L2 Icessn Elevation, Slope, and Roughness

By Ash Narkevic1, Ivan Parmuzin1, Beata Maria Csatho1, Greg Babonis1

1. University at Buffalo, SUNY (UB)

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This data set contains  IceBridge ATM L2 Icessn Elevation, Slope, and Roughness data  (Studinger, M. 2014, updated 2020) organized into individual flight lines, both in ascii and ArcGIS shape file formats.  The data were collected as part of NASA's Operation IceBridge (OIB) airborne survey campaigns in 1993-2019.

The Icessn data set includes resampled and smoothed elevation, slope and roughness data of the Greenland land ice surface derived from NASA's Airborne Topographic Mapper (ATM) measurement. It is derived from the original dense ATM laser altimetry measurements and contains elevations at the centers an 80 m nadir platelet and five equally spaced platelets spanning the swath-width, all with center  elevation and local slope values covering the 150- to 250-m-wide swath scanned by ATM.  The root mean-square error (RMSE) value of the elevation accuracy of the platelet approximation is about 0.05–0.1 m (Martin et al., 2012).

The Icessn data set is divided into small, one-minute long segments. We combined the small segments for each flight into ArcGIS shape files and ascii files (one shape file and ascii file per flight). See Readme file (in Supporting Docs) for the data format. 

Example map of 2015 spring flight lines.

Maps for each OIB campaign are posted NASA's OIB web site.

Data can be downloaded from the GHub-GrISObs Globus Endpoint. Data are accessible to all logged in users of Globus. For more information on how to obtain data from Ghub visit Accessing Data web page. Questions, problems - email to Ivan Parmuzin (

Martin CF, Krabill WB, Manizade SS, Russell RL, 2012. Airborne Topographic Mapper Calibration Procedures and Accuracy Assessment (NASA Goddard Space Flight Cent, Greenbelt, MD), Tech Memo 2012-215891.


Cite this work

Researchers should cite this work as follows:

  • Studinger, M 2014, updated 2020. IceBridge ATM L1B Elevation and Return Strength, Version 2. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi:
  • Ash Narkevic; Ivan Parmuzin; Beata Maria Csatho; Greg Babonis (2021), "IceBridge ATM L2 Icessn Elevation, Slope, and Roughness,"

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