• On Wednesday, June 12 from 9:00 a.m. to 12:00 p.m. (US Mountain Time), the following data collections may not be available due to a planned system maintenance: ASO, AMSR Unified, AMSR-E, Aquarius, High Mountain Asia, IceBridge, ICESat/GLAS, ICESat-2, LVIS, MEaSUREs, MODIS, Nimbus, SMAP, SnowEx, SSM/I-SSMIS and VIIRS. Users of the SMAP near real-time products should use the NASA LANCE HTTPS File System for data access. 


Ice, Cloud, and land Elevation / Geoscience Laser Altimeter System
ICESat/GLAS Long Term Archive

The ICESat/GLAS Long Term Archive (LTA) is a selection of data preservation documentation for ICESat/GLAS data. This data preservation maintains the usability of data for future research and new scientists, and includes keeping the data in a safe and secure system as well as maintaining the availability of related information necessary to use the data in a secure archive far into the future.


NASA's Geoscience Laser Altimeter System (GLAS) instrument aboard the NASA Ice, Cloud, and land Elevation Satellite (ICESat) launched on 12 January 2003. ICESat's science mission spanned 18 laser operations from 20 February 2003 to 11 October 2009. The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is the designated data archive for GLAS data.

LTA Access

Files are stored in an online archive that is accessible through a NASA EarthData account. To explore the archive, click on the links below:

ICESat/GLAS Long Term Archive (LTA)