Emergency Data Distribution Network (EDDN) Information and Updates
The Emergency Data Distribution Network (EDDN) is a system that receives data independently of Wallops Island and distributes it efficiently. Recent updates include receiving LRIT data feeds and becoming CS2 compliant. EDDN offers web services for accessing messages based on criteria and a public webpage for status updates and information. Users can access GOES DCS messages through EDDN's web services, among other features. Learn more about EDDN's functions and capabilities at EROS. Access EDDN's field test page to retrieve specific DCP messages easily.
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EDDN Status and Information Dan Schwitalla ddschwit@usgs.gov 1 2009 USGS STIWG/TWG 6-8 May 2014
EDDN Basic Information EDDN = Emergency Data Distribution Network Receives data from all DCPs transmitting in the GOES DCS independently of Wallops Island. It is a satellite downlink at a receive site sufficiently distant from Wallops Island to achieve event independence. Distributes data independently of Wallops Island. 2
Recent Updates The EDDN is now receiving an LRIT data feed. The LRGS connected to the LRIT is internal, but the data is available to the public servers. The EDDN receive system is now CS2 compliant. 3
More Information about EDDN at EROS The EDDN has a public Web page that provides: Status of the public data servers Access to a system monitoring page Web pages that describe the EDDN, describe message format of DCP data, provide message access services, and make available relevant documentation. URL is http://eddn.usgs.gov 4
EDDN Web Services http://eddn.usgs.gov/msgaccess.html Users can access GOES DCS messages based upon time, address, and channel criteria. (Does not decode the data) http://eddn.usgs.gov/fieldtest.html Provides a low-bandwidth means of publicly accessing messages from a specific DCP. Designed for the access from a cell phone or PDA. 5
EDDN Field Test Page Criteria Page Page Source <html><head><title>FIELD MESSAGE RETRIEVAL</title><body> <form action="http://lrgseddn1.cr.usgs.gov/cgi-bin/fieldtest.pl" method="POST"> <p><font size="+1">DCP ADDRESS (required):</font><br> <input type="text" name="DCPID" size="8"></p> <p><font size="+1">Back </font><br> <input type="text" name="SINCE" size="3"> hours</p> <p><input type="submit" value="Retrieve" name="B1"></p> </form> </body></html> Result Page EDDN Field Retrieval DCP: DD29E3F0 From now minus 8 hours until now. DD29E3F009082065534G42-4NN130WXW000243J@@l@GA@@l@F?@@l@F?zWJ DD29E3F009082053520G42-4NN130WXW000242E@@l@Fz@@l@Fy@@l@FyzVJ 7
EDDN National Configuration Repository A database has been created with web page access that allows users to examine and download configurations used to define sites, sensors, and platforms in the USGS and other government agencies. The database is updated on Wednesday and Saturday mornings http://eddn.usgs.gov/configSelect.html 8
