Long Term Archive

Data Preservation

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 (ICESat) satellite launched on 12 January 2003. ICESat's science mission spanned 18 laser operations from 20 February 2003 to 11 October 2009.

The National Snow and Ice Data Center (NSIDC) Distributed Active Archive Center (DAAC) has completed a data preservation campaign for data from the GLAS instrument. NSIDC DAAC is the designated data archive for GLAS data.

Data preservation encompasses eight sections:

  • Preflight/Pre-Operations Calibration
  • Science Data Products
  • Product Documentation
  • Mission Calibration
  • Science Data Product Software
  • Science Data Product Algorithm Input
  • Science Data Product Validation
  • Science Data Software Tools

For detailed information on ICESat/GLAS data preservation see the GLAS Preservation Documents page.

Notice to Long Term Archive (LTA) Users: The NASA ICESat/GLAS Long Term Archive at NSIDC DAAC preserves publicly accessible documents related to the ICESat/GLAS mission. Level-0 and ancillary products are available for distribution by request.  There is no support for Level-0 products, ancillary products, or other content in the LTA.

For further information on data and associated documentation that must be preserved from NASA Earth Science missions, see the NASA Earth Science Data Preservation Content Specification document.