gov.noaa.ngdc:G00566 National Geophysical Data Center (comp) 1965 First Boulder, CO National Geophysical Data Center http://www.ngdc.noaa.gov/stp Ionospheric Total Electron Content (TEC) is the total number of electrons in a column of unit cross section extending from the transmitter to the receiver. TEC is calculated from observations of the rotation of a polarized signal (faraday rotations) transmitted from the satellite. There are several specific techniques for obtaining TEC by using Faraday rotation. Estimates of accuracy for these data range from 2 percent to 30 percent, depending on the technique and the validity of assumptions for the particular observational conditions. These data consist of publications or computer printouts. Listed below are the available stations. The dates may not be inclusive. Ahmedabad 196411-196712 Bangkok 196411-196612 Delhi 196410-196612 (Explorer 22) Report 32 196410-196512 Report 33 196601-196612 Report 66 196506-196709 (Explorer 27) Lunping 197703-198312 (Some of these data are available in digital form.) Hamilton, Mass. 196801-196812 (Medians only.) Hamilton, Mass. 196711-197212 Hawaii 196409-197312 (only plots) Haifa (Israel) 198103-198303 Fort Monmouth 198302-198303 Florence(Italy) 196401-196606 Puerto Rico 197601-197603 San Jose 196412-196512 Dos Campos Slough 197511-197607 Tucuman 197606-197610 Urbana, Ill. 196712-197012 Val-Joyeux 196505-196712 (Solar times used. Area is from 40-52N and 7E-3W.) Transmitter/Receiver Path Research G00566 POLARIMETERS GEOSTATIONARY SATELLITES CGC > Climate & Global Change National Geophysical Data Center Paper http://www.ngdc.noaa.gov/stp/IONO/ionohome.html 19641001 19831231 Ground Condition In work Monthly -180.000000 180.000000 90.000000 -90.000000 NASA/GCMD Earth Science Keywords EARTH SCIENCE > SOLAR PHYSICS > Solar Energetic Particles > Particle Density Uncontrolled Keywords Space Physics > Ionospheric Science Total Electron Content TEC Faraday Rotations ISO 19115 Topic Category geoscientificInformation NASA/GCMD Data Center Keywords WDC/STP, BOULDER > World Data Center for Solar-Terrestrial Physics, Boulder DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce NASA/GCMD Location Keywords Global No Constraints None DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Rob Redmon Mailing and Physical

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Boulder CO 80305 USA (303) 497-4331 (303) 497-6513 ionosonde@noaa.gov 7:30 - 5:00 Mountain DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Rob Redmon Mailing and Physical

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Boulder CO 80305 USA (303) 497-4331 (303) 497-6513 ionosonde@noaa.gov 7:30 - 5:00 Mountain TEC Disclaimer While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. Paper Pages Depends on the Data Set Price information is available upon request. Prepay by check, money order or bank card There is a standard handling charge, with additional costs for special handling. Orders may be placed via fax, email, regular mail or telephone 4 Days Contact data center for information Contact data center for information 20070302 19970710 20010601 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Rob Redmon Mailing and Physical

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Boulder CO 80305 USA (303) 497-4331 (303) 497-6513 ionosonde@noaa.gov 7:30 - 5:00 Mountain Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 http://www.ngdc.noaa.gov/metadata/extensions/local_extensions.html NGDC Extensions to FGDC Metadata