As a condition of using these data, you must cite the use of this data set using the following citation:
Zwally, H. J., R. Schutz, C. Bentley, J. Bufton, T. Herring, J. Minster, J. Spinhirne, and R. Thomas. 2014. GLAS/ICESat L1B Global Elevation Data, Version 34. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: http://dx.doi.org/10.5067/ICESAT/GLAS/DATA126. [Date Accessed].
Standard server log information, such as IP address, time spent on the site, browser type, etc., is collected and assessed on an aggregate, rather than individual, basis in order to track site statistics, data that are most popular to our visitors, performance monitoring, and troubleshooting. Studying access statistics and usage patterns helps to project future hardware needs, and aids in the design of new functionality. We also use this information for site and system security. We do not share server log and user information with third parties for marketing or other purposes. Aggregate usage information may be shared with our data provider and funders to allow them to quantify usage of their data.