Name: ATLAS/ICESat-2 L3A Sea Ice Freeboard, Version 4
Creator: National Snow and Ice Data Center
Keywords: FREEBOARD

ATLAS/ICESat-2 L3A Sea Ice Freeboard, Version 4

Data set id:

ATL10

DOI: 10.5067/ATLAS/ATL10.004

Data Citation and Acknowledgment
As a condition of using these data, you must cite the use of this data set. Such a practice gives credit to data set producers and advances principles of transparency and reproducibility.

Kwok, R., Petty, A. A., Cunningham, G., Markus, T., Hancock, D., Ivanoff, A., Wimert, J., Bagnardi, M., Kurtz, N. & the ICESat-2 Science Team. (2021). ATLAS/ICESat-2 L3A Sea Ice Freeboard. (ATL10, Version 4). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL10.004. [describe subset used if applicable]. Date Accessed 11-13-2026.

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There is a more recent version of these data.
Version Summary

Implemented freeboard beam along-track slope for ATL10; referenced surface along-track slope is now reported on ATL10; Updated the default value of the controllable parameter height_segment_fit_quality_flag_max to 4; The default values of upper and lower bounds of the freeboard reference surface and ht_thresh2 have been updated to match the ATBD; Mean sea surface, geoid, and height data products are placed into a consistent tide-free system. Free-to-mean tide conversion factors are included to easily change to mean tide system.

Overview

This data set (ATL10) contains estimates of sea ice freeboard, calculated using three different approaches. Sea ice leads used to establish the reference sea surface and descriptive statistics used in the height estimates are also provided. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.

Parameter(s):

FREEBOARD

Platform(s):

ICESat-2

Sensor(s):

ATLAS

Data Format(s):

HDF5

Temporal Coverage:

14 October 2018 to 15 July 2021

Temporal Resolution:

91 day

Spatial Resolution:

Not Specified

Spatial Reference System(s):

WGS 84
EPSG:4326

Spatial Coverage:

Northern latitude
90
Southern latitude
-90
Eastern longitude
180
Western longitude
-180

Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

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Data Access & Tools

This data set has been retired. There is a more recent version of these data.

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