2.0.1 spase://vspo/numericalData/P_POLAR_HDR_EFI_6S Polar EFI 6-sec Key Parameters 2007-06-01T00:00:00 Polar EFI (Electric Field Instrument) key parameters, 6-sec field components and spectral densities at 3 frequencies spase://SMWG/Person/Forrest.S.Mozer GeneralContact spase://SMWG/Repository/NASA/NSSDC Online Open in CDF via ftp from CDAWeb ftp://cdaweb.gsfc.nasa.gov/pub/istp/polar/efi CDAWeb http://cdaweb.gsfc.nasa.gov/ CDF CALIBRATED spase://SMWG/Instrument/POLAR/EFI ElectricField 1996-03-15T00:00:00 2008-04-16T00:00:00 PT6S Earth.Magnetosphere spase://SMWG/Observatory/POLAR POLAR Polar Plasma Laboratory GGS/Polar ISTP/Polar 2009-05-20T20:00:12Z POLAR is one of four spacecraft in the Global Geospace Science (GGS) program. These are among the six spacecraft in the International Solar Terrestrial Physics (ISTP) program. POLAR provides multi-wavelength imaging of the aurora, measuring plasma entry into the polar magnetosphere and geomagnetic tail, the flow of plasmas to and from the ionosphere, and the deposition of particle energy in the ionosphere and upper atmosphere. POLAR has on-board propulsion systems and a design lifetime of three to five years, with redundant subsystems. POLAR is cylindrical, approximately 2.8 m in diameter by 1.25 m high (plus 1.25 m for its two despun platforms), with body-mounted solar cells, weighs 1250 kg and uses 333 W of power. The spin rate is 10 rpm around an axis approximately normal to the orbital plane. It has long wire spin-plane antennas, inertial booms, and spin-plane appendages to support sensors. POLAR has two despun gimbaled instrument platforms, and booms are deployed along both Z axes. Data are stored using on-board tape recorders and are relayed to the Deep Space Network at 600 kbps maximum (250 kbps nominal) although the average real-time data rate for POLAR is 41.6 kbps. POLAR has a 22.6-h polar orbit (90 deg inclination), with perigee and apogee of 11,500 and 57,000 km. Polar was launched to observe the polar magnetosphere and, as its orbit has precessed with time, has observed the equatorial inner magnetosphere and is now carrying out an extended period of southern hemisphere coverage. Details on the POLAR mission and instrumentation are provided in Space Science Reviews (Vol. 71, Nos. 1-4, 1995) and reprinted in The Global Geospace Mission, edited by C. T. Russell (Kluwer, 1995). spase://SMWG/Person/John.B.Sigwarth ProjectScientist NASA Polar Project http://pwg.gsfc.nasa.gov/polar/ Web site of NASA Polar Mission, including overview, data products, FTP to the data, publications, educational outreach, orbits, instrument descriptions, contacts, news archive, and ISTP archive. NSSDC's Master Catalog http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1996-013A Information about the Polar mission spase://vspo/observatory/67 Earth.Magnetosphere Earth.Magnetosphere.Polar Earth.Magnetosphere.RadiationBelt spase://SMWG/Instrument/POLAR/EFI Electric Fields Investigation (EFI) EFI 2009-05-20T21:10:13Z The objectives of this investigation are to study (1) large parallel and perpendicular electric fields in double layers and electrostatic shocks, (2) larger spatial-scale parallel electric fields responsible for upgoing ions and inverted-V electron acceleration, (3) the high latitude convection electric field, (4) the electric field structure of the high latitude magnetosphere, polar cusp, and plasma mantle, and (5) the electric field comparisons (with other spacecraft in the ISTP program) at different points along the same magnetic field line, at different points along a common boundary, or in different regions of the magnetosphere. The instrument consists of three orthogonal double probes, each of which is a pair of separated conductors whose potential difference is measured. One pair consists of spheres located in the satellite spin plane and separated by 160 m at the ends of wire booms. A second pair consists of cylindrical wire boom elements located in the spin plane and separated by an effective distance of 350 m. The third pair consists of spheres that are oriented parallel to the satellite spin axis and are separated by 14 m at the ends of rigid booms. spase://SMWG/Person/Forrest.S.Mozer PrincipalInvestigator NSSDC's Master Catalog http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1996-013A&ex=9 Information about the Electric Fields Investigation (EFI) experiment on the Polar mission. DoubleSphere Electric Fields Investigation (EFI) on Polar spase://SMWG/Observatory/POLAR spase://SMWG/Repository/NASA/NSSDC NSSDC 2008-08-26T21:02:30Z National Space Science Data Center spase://SMWG/Person/Edwin.J.Grayzeck.Jr GeneralContact spase://SMWG/Person/Edwin.V.Bell.II GeneralContact spase://SMWG/Repository/NSSDC spase://SMWG/Person/Edwin.V.Bell.II Dr. Edwin V. Bell, II GSFC-Code 690.1 spase://SMWG/Person/Forrest.S.Mozer 2008-08-26T18:43:16Z Prof. Forrest S. Mozer University of California, Berkeley

Room 306 Space Science Laboratory University of California, Berkeley Berkeley CA 94720

mozer@sunspot.ssl.berkeley.edu +1-510-642-0549 spase://SMWG/Person/Edwin.J.Grayzeck.Jr Dr. Edwin J. Grayzeck, Jr. GSFC-Code 690.1 spase://SMWG/Person/John.B.Sigwarth 2007-12-04T23:11:21Z Dr. John B. Sigwarth NASA Goddard Space Flight Center

NASA/GSFC, Code 674, Greenbelt, MD 20771

pwg_project@nssdc.nasa.gov