2.0.0 spase://VHO/NumericalData/Vega1/MISCHA/FLYBY.PT0.1S Vega 1 Magnetic Field Data (0.1 s), Halley Comet 2009-05-20T19:08:29Z This product contains high-resolution (0.1 s) magnetic field data for intervals of the closest approach of the Vega 1 spacecraft to Halley comet. Magnetic field and position data are in the cometocentric solar ecliptic (CSE) coordinate system. CSE coordinate system for the spacecraft position: * Origin is at comet position, x-axis from comet to the Sun, z-axis to ecliptic northpole. * The (x,y)-plane is parallel to the ecliptic plane. CSE coordinate system for the magnetic field data: * Axes are parallel to the CSE system for the position. * This coordinate system is valid only for very short time, about 4 hours around the closest approach of the spacecraft to the comet, since for a larger angular distance of the spacecraft from the comet, the direction to the Sun from both objects will be different. Use of these data in publications should be accompanied by acknowledgements of the National Space Science Data Center(NSSDC), Space Physics Data Facility(SPDF) and IZMIRAN at Moscow. spase://SMWG/Person/Valery.G.Petrov GeneralContact spase://SMWG/Person/Valery.A.Styazhkin DataProducer spase://SMWG/Person/Natalia.E.Papitashvili TechnicalContact spase://SMWG/Person/Jan.Merka MetadataContact spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF FTP area ftp://spdf.gsfc.nasa.gov/pub/data/zzz_old/vega_data_from_nssdc/mag/ FTP access to Vega mission data at NSSDC. SPDF HTTP area http://spdf.gsfc.nasa.gov/pub/data/zzz_old/vega_data_from_nssdc/mag/ In CDF via HTTP from SPDF Text.ASCII ASCII spase://SMWG/Instrument/Vega1/MISCHA MagneticField Ephemeris 1986-03-06T04:21:01Z 1986-03-06T08:24:24Z PT0.1S Heliosphere.Inner Comet The CSE coordinate system for magnetic field data is valid only for very short time, about 4 hours around the closest approach of the spacecraft to the comet, since for a larger angular distance of the spacecraft from the comet, the direction to the Sun from both objects will be different. Year Column 1 Time of observation (year) Temporal Month Column 2 Time of observation (month of year) Temporal Day Column 3 Time of observation (day of month) Temporal Hour Column 4 Time of observation (hour of day) Temporal Minute Column 5 Time of observation (minute) Temporal Second Column 6 Time of observation (second) s Temporal Bx Column 7 Magnetic field X in CSE coordinate system nT 1e-9>T Cartesian Component.I Average Magnetic By Column 8 Magnetic field By component in CSE coordinate system nT 1e-9>T Cartesian Component.J Average Magnetic Bz Column 9 Magnetic field Bz component in CSE coordinate system nT 1e-9>T Cartesian Component.K Average Magnetic B Column 10 Magnetic field magnitude, nT nT 1e-9>T 9999.9 Magnitude Average Magnetic X Column 11 X component of spacecraft position in CSE coordinates (Cometocentric ecliptic coordinate system) km 1e3>m Cartesian Component.I Positional Yse Column 12 Y component of spacecraft position in CSE coordinates (Cometocentric ecliptic coordinate system) km 1e3>m Cartesian Component.J Positional Zse Column 13 Z component of spacecraft position in CSE coordinates (Cometocentric ecliptic coordinate system) km 1e3>m Cartesian Component.K Positional Dist Column 14 Distance between spacecraft and Halley comet, km km 1e3>m Positional