View source for Network-Day Tape

{{FormatInfo
|formattype=electronic
|subcat=Scientific Data formats
|released=1980
}}
The '''Network-Day Tape''' format, sometimes referred to along with the name of its creator, the Global Digital Seismograph Network, as the '''GDSN Network-Day Tape''' format or simply as the '''GDSN''' format, is a format for storing [[Scientific Data formats#Earth Sciences|seismic]] station data in use primarily in the United States from somewhere around 1980<ref>https://pubs.usgs.gov/of/1981/0666/report.pdf, e.g. on page 36 (page 39 of the PDF) makes reference to the software being written in late 1980</ref> to 1987, when the [[SEED]] format largely supplanted it, in the United States as well as internationally<ref>http://www.fdsn.org/pdf/SEEDManual_V2.4.pdf, page 2</ref>. As the name would suggest, it was meant for storing data on magnetic tape. It may have been designed by a "Madeline Zirbes" at the United States Geological Survey.<ref>https://pubs.usgs.gov/of/1981/0666/report.pdf, last page and first page; the same name is also listed many times as the author of the software to read the format, within comments. It is possible that the format itself was designed by someone else, and that only the major implementation was written by "Madeline Zirbes".</ref>

== Links ==
* [https://pubs.usgs.gov/of/1981/0666/report.pdf Network-Delay Tape Software Users Guide (1981)]: contains [[Ratfor]] source to read the format<ref>https://pubs.usgs.gov/of/1981/0666/report.pdf, page 31 (35 of PDF)</ref>
* [https://archive.org/details/DTIC_ADA088081/ Design Description Day Tape Programs (1980)]: A manual for software, possibly to read this format
* [https://earthquake.usgs.gov/monitoring/gsn/ Global Digital Seismographic Network website]

== References ==
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