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ATLAS/ICESat-2 L3B Daily and Monthly Gridded Sea Ice Freeboard, Version 4
Data set id:
ATL20
DOI: 10.5067/ATLAS/ATL20.004
This is the most recent version of these data.
Version Summary
-Correct reported longitude values to agree with NSIDC Polar Stereographic projections
-Added grid_mapping attribute to land_mask_map array
-Updated the mean sea surface (MSS) variable description; added mentions of the source of the MSS (which uses CryoSat-2 data) and clarified the use of the tide-free system
In this section
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Overview

ATL20 contains daily and monthly gridded estimates of sea ice freeboard, derived from along-track freeboard estimates in the ATLAS/ICESat-2 L3A Sea Ice Freeboard product (ATL10). Data are gridded at 25 km using the SSM/I Polar Stereographic Projection.
Parameter(s):
FREEBOARD
Platform(s):
ICESat-2
Sensor(s):
ATLAS
Data Format(s):
HDF5
Temporal Coverage:
14 October 2018 to present
Temporal Resolution:
  • 1 day
Spatial Resolution:
  • 25 km
  • 25 km
Spatial Reference System(s):
NSIDC Sea Ice Polar Stereographic North
EPSG:3411

NSIDC Sea Ice Polar Stereographic South
EPSG:3412
Spatial Coverage:
N:
90
S:
-90
E:
180
W:
-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

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Documentation

Help Articles

General Questions & FAQs

FAQs About NSIDC DAAC's Earthdata Cloud Migration
This article covers frequently asked questions about the NASA NSIDC DAAC's Earthdata cloud migration project and what it means to data users.
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What subsetting and reformatting services are available for ICESat-2 data?
This short article describes the customization services available for ICESat-2 data using Earthdata Search.
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How to Articles

Harmony API Quickstart Guide: Customizing NASA NSIDC DAAC data in Earthdata Cloud
Harmony API Quickstart Guide: Customizing NASA NSIDC DAAC data in Earthdata Cloud
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NASA Earthdata Cloud Data Access Guide
The NASA Earthdata Cloud is the NASA cloud-based archive of Earth observations. It is hosted by Amazon Web Services (AWS). Learn how to find and access NSIDC DAAC data directly in the cloud.
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Search, order, and customize NSIDC DAAC data with NASA Earthdata Search
This article highlights the NSIDC DAAC data sets available with customization options and outlines a workflow for searching, ordering, and customizing data in NASA Earthdata Search. This approach is ideal for users who want to download data to their local machine.
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