1. Global Earth Science Community
  2. Community Data System Programs
  3. Data System Development and Competitive Programs
  4. Advanced Discovery, Processing, and Visualization Services for ICESat and ICESat-2 Altimeter Data

Advanced Discovery, Processing, and Visualization Services for ICESat and ICESat-2 Altimeter Data

Principal Investigator: Adrian Borsa: University of California San Diego
Co-Investigators: Chaitanya Baru, Helena Fricker, Viswanath Nandigam, and Christopher Crosby: University of California, San Diego; Siri Jodha Khalsa: UNAVCO, Inc.

NASA's Ice, Cloud, and land Elevation Satellite (ICESat) used laser altimetry to measure ice sheet mass balance, cloud and aerosol heights, topography, and vegetation from 2003 to 2009. ICESat-2, launched in November 2018, will use six laser beams to provide much denser measurements of the Earth’s surface. Data from these satellites can be used to study polar ice changes, biomass and carbon storage in vegetation, and forest characteristics, such as tree density.

OpenAltimetry is a cloud-ready, web-based application for discovery, access, and visualization of ICESat and ICESat-2 data. OpenAltimetry was developed by Adrian Borsa’s team at the University of California, San Diego, in cooperation with the San Diego Supercomputer Center and NASA's National Snow and Ice Data Center (NSIDC) Distributed Active Archive Center (DAAC).

ACCESS 2015 Summary

A web application for map-based discovery and visualization of ICESat and ICESat-2 data, OpenAltimetry provides on-demand access to underlying datasets. Photo courtesy of OpenAltimetry

OpenAltimetry supports scientific research by providing quick, map-based discovery and visualization of altimetry data paired with on-demand access to the underlying datasets. It provides a hybrid solution for data management that incorporates a highly optimized PostgreSQL database with tiered storage and a decoupled object-based storage system for HDF5 files. This allows ICESat waveform energy data files and ICESat-2 photon data files to be stored in their original HDF5 format.

Open Altimetry is now operational for ICESat data, and the entire ICESat data set (GLAS/ICESat L1B Global Elevation Data, Version 34) is available for discovery and download. The project team is currently working with NSIDC DAAC to build a data workflow for ICESat-2 on existing services, to optimize user interfaces, and to make OpenAltimetry operational for real time ICESat-2 data flow.

Read more about OpenAltimetry.

Publications:

Nandigam, V., Borsa, A., Jodha Khalsa, S., Lin, K., Phan, M., Fricker, H. and Crosby, C. (2018). Access and Visualization of Spaceborne Altimetry Data from ICESat and ICESat-2. EGU General Assembly Conference Abstracts, 20.

Nandigam, V., Lin, K., Phan, M., Borsa, A., Jodha Khalsa, S., and Crosby, C. (2018). Rapid Access and Visualization of Spaceborne Altimetry Data from ICESat and ICESat-2. IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium.

Last Updated: Feb 7, 2019 at 8:50 AM EST