• The Operation IceBridge Portal is being decommissioned in June 2025 as NSIDC DAAC migrates to NASA Earthdata Cloud. On June 11, 2025, new data orders will no longer be accepted. Previous orders will remain accessible through the "Orders" tab until June 25, when the portal will be permanently removed. Learn more about alternative options and support here.

  • The NSIDC DAAC is retiring access to its legacy, on-premises data archive and transitioning to the NASA Earthdata Cloud as the primary data archive. View planned retirement dates here.

IceBridge Preliminary ATM L1B Elevation and Return Strength, Version 1
Data set id:
ILPATM1B
DOI: 10.5067/KIAE09S03PMA
This data set has been retired.
Version Summary
Initial release

Overview

This data set contained preliminary spot elevation measurements of Arctic sea ice and Greenland ice surface for four days in April 2019, acquired using the NASA Airborne Topographic Mapper (ATM) instrumentation. The data were collected as part of Operation IceBridge funded aircraft survey campaigns. Note: These data were released solely to assess and validate the performance of the ATLAS/ICESat-2 instrument and algorithm. They were not subjected to the same refinement and quality control measures as the IceBridge ATM L1B Elevation and Return Strength (ILATM1B) product and may have contained errors. Once NSIDC released the final ILATM1B data in March 2021, these preliminary data were retired and are no longer available for download.
Parameter(s):
GLACIER ELEVATION/ICE SHEET ELEVATION
Platform(s):
C-130, DC-8, HU-25A, HU-25C, P-3B, WP-3D ORION
Sensor(s):
ATM
Data Format(s):
HDF5
Temporal Coverage:
8 April 2019 to 22 April 2019
Temporal Resolution:
  • Varies
Spatial Resolution:
  • varies
  • varies
Spatial Coverage:
N:
90
S:
60
E:
180
W:
-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

Data Access & Tools

This data set has been retired. Please contact user services if you have questions.

Help Articles

General Questions & FAQs

This article covers frequently asked questions about the NASA NSIDC DAAC's Earthdata cloud migration project and what it means to data users.
The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is migrating its primary data access from its legacy, on-premises archive to the NASA Earthdata Cloud.

How to Articles

Many NSIDC DAAC data sets can be accessed using NSIDC DAAC's Data Access Tool. This tool provides the ability to search and filter data with spatial and temporal constraints using a map-based interface.Users have the option to:
To convert HDF5 files into binary format you will need to use the h5dump utility, which is part of the HDF5 distribution available from the HDF Group. How you install HDF5 depends on your operating system.