2.3.1 spase://SMWG/Repository/WALDO WALDO Worldwide Archive of Low-frequency Data and Observations 2020-06-03T16:39:32 WALDO is a joint effort between Georgia Tech and CU-Denver, using data collected by Stanford University from the 1970s until 2016, and then by both Georgia Tech and CU-Denver starting in 2014. WALDO description (from https://eos.org/science-updates/returning-lightning-data-to-the-cloud) We have developed an online interface that allows easy access to the data, which can also be shared with anyone with a Google account upon request. Through the website, users can view automatically generated quick-look plots to make it easy to find out what’s available, for example, maps of receiver sites from which data from a given day are available, annual calendars showing data availability, and summary charts of the data on a day-by-day basis. WALDO enables direct access to raw data including: Broadband VLF data, Broadband LF data, Narrowband data. Quick-look plots of Broadband and Narrowband data are also available. WALDO provides software tools mostly in Matlab but Python tools are planned as well. Anticipated total data volume will exceed 1000 TB. The “What’s Available” page, and the “Availability Maps” show what sites are available for each day. DATA USAGE POLICY The data in the WALDO database have been collected by Stanford University, the Georgia Institute of Technology, and the University of Colorado Denver. Funding has been provided by the United States government under various basic science research grants over many years. To maximize the benefit of those investments, WALDO data are released without restriction, and can be freely analyzed or published. The curators of WALDO are Morris Cohen (Georgia Tech) and Mark Golkowski (CU-Denver). We request that the following acknowledgement be added in any publication using data from WALDO "VLF data are provided by the WALDO database (http://waldo.world), operated jointly by the Georgia Institute of Technology, and the University of Colorado Denver, using data collected from those institutions as well as Stanford University, and has been supported by various US government grants from the NSF, NASA, and the Department of Defense." If extensive amounts of WALDO data are used in a publication, the curators request, but do not require, to be contacted to discuss the possibility of joint authorship, with the WALDO curators providing help analyzing and interpreting the large dataset. spase://SMWG/Person/Morris.Cohen ArchiveSpecialist spase://SMWG/Person/Mark.Golkowski ArchiveSpecialist Returning Lightning Data to the Cloud https://doi.org/10.1029/2020EO142801 WALDO http://waldo.world