01297nam a2200277Ia 4500 197204 BIBL 20160527192745.0 920109c19899999couar u f eng d (OCoLC)25071912 GIS GIS MNM PUXA QC830.U5 U5 USGS/NGIC geomagnetic observatory data [computer file]. Denver, Colo. U.S. Geological Survey, National Geomagnetic Information Center 1991- computer laser optical disks 4 3/4 in. computer disks (5 1/4 in.) + user manual Annual, with 5-year archival cumulations 1985-1989- Title from disk label. Disk Characteristics: CD-ROM Contains one-minute values of geomagnetic data from all magnetic observatories of the USGS network. The values are provided as 3-component vector data from a fluxgate magnetometer, as well as scalar data from a proton precession magnetometer. System requirements: IBM PC or compatible; EGA; VGA; presentation software GODIS written in C-language. Geomagnetism Observations CD-ROM. Local 101972 CD-ROM Fed. Doc. Local 71074 National Geomagnetic Information Center U.S. Local 141302 149164 149164 0 0 0 CD_FED 0 evref 186263 10 10 9 2016-05-27 288550 0 CD-FED 80000001837262 2016-05-27 00:00:00 1993 r:197204 z:NCC:D 9