2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/NumericalData/Vega1/MISCHA/FLYBY/PT0.1S NASA NumericalData Vega 1 Magnetic Field Data (0.1 s), Halley Comet 2026-04-10T10:04:05Z 2020-07-07T21:15:50Z Only known prior ReleaseDate of the metadata 2025-12-04T13:32:24Z Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB 2026-04-10T09:59:13Z Added new Contact(s). ZCB 2026-04-10T10:04:05Z Added PublicationInfo. ZCB 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. Verigin, Mikhail I. 2026-04-10T10:04:05Z Space Physics Data Facility spase://SMWG/Person/Mikhail.I.Verigin CoPI 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://VHO/NumericalData/Vega1/MISCHA/FLYBY.PT0.1S spase://VSPO/NumericalData/Vega1/MISCHA/FLYBY/PT0.1S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/zzz_old/vega_data_from_nssdc/mag/ FTP access to Vega mission data at NSSDC. HTTPS from SPDF https://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 GSE Component.I Average Magnetic By Column 8 Magnetic field By component in CSE coordinate system nT 1e-9>T Cartesian GSE Component.J Average Magnetic Bz Column 9 Magnetic field Bz component in CSE coordinate system nT 1e-9>T Cartesian GSE 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 GSE Component.I Positional Yse Column 12 Y component of spacecraft position in CSE coordinates (Cometocentric ecliptic coordinate system) km 1e3>m Cartesian GSE Component.J Positional Zse Column 13 Z component of spacecraft position in CSE coordinates (Cometocentric ecliptic coordinate system) km 1e3>m Cartesian GSE Component.K Positional Dist Column 14 Distance between spacecraft and Halley comet, km km 1e3>m Positional