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This data set contains 1 minute data of the magnetic field components (RTN) and field magnitude from the Vector Helium Magnetometer. Units are nT. Data Set Contact: Joyce Wolf, NASA JPL Principal Investigator: A Balogh, The Blackett Laboratory, Imperial College, London, UK. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 221-236 (1992). Relevant Web Sites: http://www.sp.ph.ic.ac.uk/Ulysses/
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This data set contains 1 second data of the magnetic field components (RTN) and field magnitude from the Vector Helium Magnetometer. Units are nT. Data Set Contact: Joyce Wolf, NASA JPL Principal Investigator: A Balogh, The Blackett Laboratory, Imperial College, London, UK. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 221-236 (1992). Relevant Web Sites: http://www.sp.ph.ic.ac.uk/Ulysses/
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This file contains the distribution function of alpha particles. DATA REDUCTION: The SWOOPS (Solar Wind Observations Over the Poles of the Sun) ion instrument is a spherical-section curved-plate electrostatic analyzer. Particle arrival directions are measured in spacecraft coordinates of azimuth (scanned by spacecraft rotation) and elevation (determined by the detector number) angles. The spacecraft spin axis was oriented toward the Earth. The energy/charge (E/q) resolution was ~2.5% while the azimuth (phi) and elevation (theta) resolutions were both ~5.6o. A description of the SWOOPS is given in a paper by S. J. Bame, D. J. McComas, B. L. Barraclough, J. L. Phillips, K. J. Sofaly, J. C. Chavez, B. E. Goldstein, and R. K. Sakurai, Astronomy and Astrophysics Supplement Series, Ulysses Instruments Special Issue, Vol. 92, No. 2, p.237-265, 1992. The number of counts in each E/q-phi-theta bin were examined to determine the peak of the proton and alpha particle distribution, respectively, and the vector magnetic field (in spacecraft coordinates) was obtained for the time at which the peak was measured. A "coarse" 2-dimensional matrix was then formed by rotating the data into a coordinate system with axes parallel and perpendicular to the field direction. Note that gyrotropy is assumed in making that transformation. The resolution of the matrix is "coarse" because the vector velocity assigned to each bin was taken to be at the center of the bin. In reality, the counts in each bin were probably not smoothly distributed in velocity space over the bin, but were weighted toward the part of the bin nearest the center of the peak of the velocity distribution. The "coarse" distribution would thus yield values for the density and temperature that were higher than the true values. A correction for that effect was accomplished by fitting contours to the coarse distribution, breaking each bin or pixel into subpixels, and then using the contours and the calibrated angular responses to distribute the counts among the subpixels. New contours were then computed and the process was continued until it converged. More details about this deconvolution of the angular data are given in the appendix of a paper by Neugebauer, M., et al., "Ion distributions in large magnetic holes in the fast solar wind", J. Geophys. Res.,106, 5635, 2001. This procedure generated the matrix of velocity distribution functions of protons and alpha-particles parallel and perpendicular to the simultaneously measured magnetic field.
Log10 of the distribution function. The distribution function is a 50x25 matrix. If at a given time v_par and/or v_per have a smaller number of elements than 50 and 25, respectively, then the undefined array entries of v_par and/or v_per and of the distribution function are set to FILLVAL=-1.E30.
50 element array.
25 element array
This file contains the parameters obtained by fitting data to a bi-maxwellian core-beam distribution. Under normal circumstances, the first (slow) population is the core and the second (fast) population is the beam. When the interplanetary magnetic field is folded back on itself due to turbulence or other processes the relation of the first and second populations to the core and beam, respectively, is reversed (see, e.g, M. Neugebauer and B. E. Goldstein, AIP Conf. Proc. 1539, 46, 2013). The vector magnetic field is given in RTN coordinates and it was obtained for the time at which the peak of the alpha distribution function was measured. Only good fits are retained.
Data with "vft1">"vft2" are set to FILLVAL=-1E30. The parameter "denrat=(dnft1+dnft2)/dens" where "dens" is the value of the density found in the moments calculation, can be used as a further consistency check (ideally denrat = 1.0).
Data with "vft1">"vft2" are set to FILLVAL=-1E30. The parameter "denrat=(dnft1+dnft2)/dens" where "dens" is the value of the density found in the moments calculation, can be used as a further consistency check (ideally denrat = 1.0).
Data with "vft1">"vft2" are set to FILLVAL=-1E30. The parameter "denrat=(dnft1+dnft2)/dens" where "dens" is the value of the density found in the moments calculation, can be used as a further consistency check (ideally denrat = 1.0).
This file contains the moments obtained from the distribution function of alpha particles after deconvolution using the same magnetic field values used to construct the matrices. The vector magnetic field and the particle velocity are given in inertial RTN coordinates. The magnetic field was obtained for the time at which the peak of the alpha distribution function was measured. The particle velocity was obtained after rotating the fluid velocity from spacecraft to RTN coordinates and taking into account the spacecraft velocity. During periods of spacecraft nutation only the bulk speed and density are reliable, individual velocity components and temperatures are invalid. The beginning of scientifically useful SWOOPS data is at Day 322, 00:59 of 1990; at that time the spacecraft was already nutating; nutation ceased as of Day 351, 22:00, 1990. There are small systematic uncertainties in the velocity components. These are due to such effects as uncertainty in the accuracy of alignment on the spacecraft, relatively wide angular bins, variation in gains between channeltrons, etc. The velocity component data should not be used for studies of large scale, long term, solar wind deflection. The data are generally suitable for all other studies.
ULYSSES data have been reprocessed to ensure a uniformity of content and coordinate systems relative to data from other deep-space missions: - All spacecraft trajectory data were transformed to a Heliographic Inertial (HGI) coordinate system. - calculation of RTN Spherical components of the solar wind velocity from RTN cartesian components: - data are a merging of trajectory coordinates, magnetic field data, proton fluxes, and plasma data files. - Data gaps were filled with -1.e31. Note that an COHOWeb interface to this dataset, providing data subsetting and and graphical browsing, is available at https://omniweb.gsfc.nasa.gov/coho/ The difference between T (Large) and T (Small) is discussed at https://spdf.gsfc.nasa.gov/pub/data/ulysses/plasma/swoops/ion/swoops_ion_users_g uide_update_20030214.txt The Heliographic Inertial (HGI) coordinates are Sun-centered and inertially fixed with respect to an X-axis directed along the intersection line of the ecliptic and solar equatorial planes. The solar equator plane is inclined at 7.25 degrees from the ecliptic. This direction was towards ecliptic longitude of 74.36 degrees on 1 January 1900 at 1200 UT; because of precession of the celestial equator, this longitude increases by 1.4 degrees/century. The Z axis is directed perpendicular and northward from the solar equator, and the Y-axis completes the right-handed set. This system differs from the usual heliographic coordinates (e.g. Carrington longitudes) which are fixed in the frame of the rotating Sun. The RTN system is fixed at a spacecraft (or the planet). The R axis is directed radially away from the Sun, the T axis is the cross product of the solar rotation axis and the R axis, and the N axis is the cross product of R and T. At zero Heliographic Latitude when the spacecraft is in the solar equatorial plane the N and solar rotation axes are parallel.
The Ulysses/SWICS instrument is a mass spectrometer combining an electrostatic analyzer with post acceleration, followed by a time-of-flight and energy measurement. The instrument covers an energy per charge range from 0.16 to 59.6 keV/e with a time resolution of about 13 minutes. SWICS is designed to determine uniquely the elemental and ionic-charge composition, the temperatures and mean speeds of all major solar wind ions, from H through Fe. For more information see G. Gloeckler, J. Geiss et al., Astron. Astrophys. Suppl. Ser. 92, 267-289, 1992. This archive consists of all 18 Matrix Rates (MR) as a function of energy per charge (E/q) and of time. Each MR represents a specific element in one or several ionization states, but it may also contain significant contributions from neighbouring elements due to spillover. The MRs are given in units of count rates only. The accompanying SAPRO (SWICS Archive Processor) software can be used both to convert the MR count rates to physical units (differential flux, phase space density), to correct for spillover between different MRs, and to obtain kinetic parameters (density, speed, thermal speed) of selected ions (to be used with caution).
2006-08-18: Initial CDF data file creation
This data set contains 10 minute averages of the proton and Z>=1 flux data from the Ulysses Cosmic Ray and Solar Particle Investigation Anisotropy Telescope 1. Flux units are /cm2/s/sr/Mev. Data Set Contact: S Dalla, Space & Atmospheric Physics Group, Imperial College, London, UK. Principal Investigator: R B McKibben, Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 365-399 (1992). Relevant web sites: ftp://odysseus.uchicago.edu/WWW/Simpson/Ulysses.html http://www.sp.ph.ic.ac.uk/Ulysses/
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This data set contains 10 minute averages of the proton and Z>=1 flux data from the Ulysses Cosmic Ray and Solar Particle Investigation Anisotropy Telescope 2. Flux units are /cm2/s/sr/Mev. Data Set Contact: S Dalla, Space & Atmospheric Physics Group, Imperial College, London, UK. Principal Investigator: R B McKibben, Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 365-399 (1992). Relevant web sites: ftp://odysseus.uchicago.edu/WWW/Simpson/Ulysses.html http://www.sp.ph.ic.ac.uk/Ulysses/
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This data set contains 3 to 22 minute averages of the electron density and temperature data from the Ulysses Solar Wind Observations Over the Poles of the Sun instrument. Density units are /cm3, temperature units are K. Data Set Contact: B E Goldstein, NASA Ames Research Center, USA. Principal Investigator: D J McComas, Southwest Research Institute, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 237-265 (1992). Relevant Web Sites: http://sst.lanl.gov/nis-projects/swoops/
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This data set contains 4 to 8 minute averages of the ion density, temperature and velocity data from the Ulysses Solar Wind Observations Over the Poles of the Sun instrument. Density units are /cm3, temperature units are K, velocity units are km/s. Data Set Contact: B E Goldstein, NASA Ames Research Center, USA. Principal Investigator: D J McComas, Southwest Research Institute, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 237-265 (1992). Relevant Web Sites: http://sst.lanl.gov/nis-projects/swoops/
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This data set contains 5 minute resolution filtered averages of cosmic gamma ray and solar X-Ray count rates. Count rate units are c/s. Data Set Contact: R Williams, Space Science Laboratory, University of California, Berkeley, USA. Principal Investigator: K Hurley, Space Science Laboratory, University of California, Berkeley, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 401-410 (1992). Relevant Web Sites: http://www.ssl.berkeley.edu/ipn3/grb.htm
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This data set contains 10 minute averages of the proton, electron, and Z>=3 count rate data from the Ulysses Cosmic Ray and Solar Particle Investigation High Energy Telescope. Count rate units are /s. Data Set Contact: R B McKibben, Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, USA. Principal Investigator: R B McKibben, Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 365-399 (1992). Relevant Web Sites: ftp://odysseus.uchicago.edu/WWW/Simpson/Ulysses.html ftp://odysseus.uchicago.edu/WWW/Simpson/UlyDocs/HET.html
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This data set contains 10 minute averages of the ion flux data from the Ulysses Cosmic Ray and Solar Particle Investigation High Flux Telescope. Flux units are /cm2/s/sr. Data Set Contact: J D Anglin, Herzberg Institute for Astrophysics, National Research Council of Canada, Ottawa, Canada. Principal Investigator: R B McKibben, Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 365-399 (1992). Relevant Web Sites: ftp://odysseus.uchicago.edu/WWW/Simpson/Ulysses.html For a fuller description of the data channels and their energy levels see the format file at file://helio.estec.esa.nl/ulysses/cospin/hft/doc/ and Anglin et al., J. Geophys. Res., 102, 1 (1997).
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This data set contains 10 minute averages of the proton, helium, and electron count rate data from the Ulysses Cosmic Ray and Solar Particle Kiel Electron Telescope. Count rate units are /s. Data Set Contact: B Heber, CEA, DSM, Service d'Astrophysique, Centre d'Etudes de Saclay, 91191 Gif sur Yvette, Cedex, France. Principal Investigator: R B McKibben, Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 365-399 (1992). Relevant Web Sites: ftp://odysseus.uchicago.edu/WWW/Simpson/Ulysses.html http://www.ifctr.mi.cnr.it/Ulysses/
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This data set contains 10 minute averages of the ion and electron flux data from the Ulysses Cosmic Ray and Solar Particle Investigation Low Energy Telescope. Flux units are /cm2/s/sr/Mev. Data Set Contact: T R Sanderson, Solar System Division, ESA/ESTEC. Principal Investigator: R B McKibben, Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 365-399 (1992). Relevant Web Sites: ftp://odysseus.uchicago.edu/WWW/Simpson/Ulysses.html http://helio.estec.esa.nl/ssd/let.html
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This data set contains 10 minute averages of the average electric field intensities from the Unified Radio and Plasma Wave Instrument Plasma Frequency Receiver. Units are microVolt/Hz**0.5. Data Set Contact: R Hess, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Principal Investigator: R J Macdowall, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 291-316 (1992). Relevant Web Sites: http://urap.gsfc.nasa.gov/www/home.html
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This data set contains 10 minute averages of the peak electric field intensities from the Unified Radio and Plasma Wave Instrument Plasma Frequency Receiver. Units are microVolt/Hz**0.5. Data Set Contact: R Hess, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Principal Investigator: R J Macdowall, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 291-316 (1992). Relevant Web Sites: http://urap.gsfc.nasa.gov/www/home.html
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This data set contains 144 second averages of the electric field intensities from the Unified Radio and Plasma Wave Instrument Radio Astronomy Receiver. Units are microVolt/Hz**0.5. Data Set Contact: R Hess, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Principal Investigator: R J Macdowall, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 291-316 (1992). Relevant Web Sites: http://urap.gsfc.nasa.gov/www/home.html
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This data set contains 10 minute averages of the average electric field intensities from the Unified Radio and Plasma Wave Instrument Radio Astronomy Receiver. Units are microVolt/Hz**0.5. Data Set Contact: R Hess, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Principal Investigator: R J Macdowall, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 291-316 (1992). Relevant Web Sites: http://urap.gsfc.nasa.gov/www/home.html
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This data set contains 10 minute averages of the peak electric field intensities from the Unified Radio and Plasma Wave Instrument Radio Astronomy Receiver. Units are microVolt/Hz**0.5. Data Set Contact: R Hess, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Principal Investigator: R J Macdowall, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 291-316 (1992). Relevant Web Sites: http://urap.gsfc.nasa.gov/www/home.html
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This data set contains 10 minute averages of the averaged magnetic field intensities from the Unified Radio and Plasma Wave Instrument Waveform Analyzer Units are 1.0e-15Tesla/Hz**0.5. Data Set Contact: R Hess, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Principal Investigator: R J Macdowall, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 291-316 (1992). Relevant Web Sites: http://urap.gsfc.nasa.gov/www/home.html
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This data set contains 10 minute averages of the peak magnetic field intensities from the Unified Radio and Plasma Wave Instrument Waveform Analyzer Units are 1.0e-15Tesla/Hz**0.5. Data Set Contact: R Hess, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Principal Investigator: R J Macdowall, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 291-316 (1992). Relevant Web Sites: http://urap.gsfc.nasa.gov/www/home.html
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This data set contains 10 minute averages of the averaged electric field intensities from the Unified Radio and Plasma Wave Instrument Waveform Analyzer Units are microVolt/Hz**0.5. Data Set Contact: R Hess, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Principal Investigator: R J Macdowall, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 291-316 (1992). Relevant Web Sites: http://urap.gsfc.nasa.gov/www/home.html
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This data set contains 10 minute averages of the peak electric field intensities from the Unified Radio and Plasma Wave Instrument Waveform Analyzer Units are microVolt/Hz**0.5. Data Set Contact: R Hess, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Principal Investigator: R J Macdowall, NASA Goddard Spaceflight Center, Greenbelt, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 291-316 (1992). Relevant Web Sites: http://urap.gsfc.nasa.gov/www/home.html
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This data set contains 1 hour averages of the ion density, temperature and velocity data from the Ulysses Solar Wind Observations Over the Poles of the Sun instrument. Density units are /cm3, temperature units are K, velocity units are km/s. Data Set Contact: B E Goldstein, NASA Ames Research Center, USA. Principal Investigator: D J McComas, Southwest Research Institute, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 237-265 (1992). Relevant Web Sites: http://sst.lanl.gov/nis-projects/swoops/
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This data set contains 1 hour averages of the proton and electron flux data from the Ulysses Energetic Particle Composition Experiment. Flux units are /cm2/s/sr. Data Set Contact: M Bruns, Max Planck Institut fur Aeronomie, Lindau, Germany. Principal Investigator: E Keppler, Max Planck Institut fur Aeronomie, Lindau, Germany. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 317-331 (1992). Relevant Web Sites: http://www.mpae.gwdg.de/mpae_projects/ULYSSES/EPAC.html
Data version 1: Original ASCII source data. Data version 2: Applies to 1996 CDFs onwards, which have been replaced using ASCII source files generated with a program which does not remove low event rate data, as was the case for version 1 data. Pre-1996 files are not reprocessed/replaced as version 2 as no useful low event rate data exists pre-1996. For further details contact M. Bruns, Max Planck Institut fur Aeronomie, Lindau, Germany. Data version 3: Applies to 1993 data onwards. In previous versions of data in this period the electron channels were in the wrong order in the source files, such that data read in the intended order ELTL1, EHTL1, ELTL2, EHTL2, ELTL3, EHTL3, ELTL4, EHTL4 was actually read from fields in the order ELTL1, ELTL2, ELTL3, ELTL4, EHTL1, EHTL2, EHTL3, EHTL4 This version uses corrected source data
This data set contains 1 hour spin averaged count rates of the electron and ion data from the Ulysses Heliosphere Instrument for Spectra, Composition and Anisotropy at Low Energies (HI-SCALE) Low Energy Foil Spectrometer at 150 degrees to the spacecraft spin axis. Count rate units are /s. Data Set Contact: T P Armstrong, Department of Physics & Astronomy, University of Kansas, USA. Principal Investigator: L J Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 349-363 (1992). Relevant Web Sites: http://sd-www.jhuapl.edu/Ulysses/ http://kuspa1.phsx.ukans.edu:8000/~ulysses/index.html
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This data set contains 1 hour spin averaged count rates of the electron and ion data from the Ulysses Heliosphere Instrument for Spectra, Composition and Anisotropy at Low Energies (HI-SCALE) Low Energy Foil Spectrometer at 60 degrees to the spacecraft spin axis. Count rate units are /s. Data Set Contact: T P Armstrong, Department of Physics & Astronomy, University of Kansas, USA. Principal Investigator: L J Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 349-363 (1992). Relevant Web Sites: http://sd-www.jhuapl.edu/Ulysses/ http://kuspa1.phsx.ukans.edu:8000/~ulysses/index.html
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This data set contains 1 hour spin averaged count rates of the ion data from the Ulysses Heliosphere Instrument for Spectra, Composition and Anisotropy at Low Energies (HI-SCALE) Low Energy Magnetic Spectrometer at 120 degrees to the spacecraft spin axis. Count rate units are /s. Data Set Contact: T P Armstrong, Department of Physics & Astronomy, University of Kansas, USA. Principal Investigator: L J Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 349-363 (1992). Relevant Web Sites: http://sd-www.jhuapl.edu/Ulysses/ http://kuspa1.phsx.ukans.edu:8000/~ulysses/index.html
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This data set contains 1 hour spin averaged count rates of the ion data from the Ulysses Heliosphere Instrument for Spectra, Composition and Anisotropy at Low Energies (HI-SCALE) Low Energy Magnetic Spectrometer at 30 degrees to the spacecraft spin axis. Count rate units are /s. Data Set Contact: T P Armstrong, Department of Physics & Astronomy, University of Kansas, USA. Principal Investigator: L J Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 349-363 (1992). Relevant Web Sites: http://sd-www.jhuapl.edu/Ulysses/ http://kuspa1.phsx.ukans.edu:8000/~ulysses/index.html
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This data set contains 1 hour spin averaged count rates of the deflected electron data from the Ulysses Heliosphere Instrument for Spectra, Composition and Anisotropy at Low Energies (HI-SCALE) Low Energy Magnetic Spectrometer at 30 degrees to the spacecraft spin axis. Count rate units are /s. Data Set Contact: T P Armstrong, Department of Physics & Astronomy, University of Kansas, USA. Principal Investigator: L J Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 349-363 (1992). Relevant Web Sites: http://sd-www.jhuapl.edu/Ulysses/ http://kuspa1.phsx.ukans.edu:8000/~ulysses/index.html
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This data set contains 3.5 hour averages of the solar wind ion density ratio (to O6+), velocity and temperature from the Ulysses Solar Wind Ion Composition Spectrometer. Velocity units are km/s. Ratios and Fe Charge State have no units Data Set Contact: R von Steiger, International Space Science Institute, Bern, Switzerland. Principal Investigators: J Geiss, International Space Science Institute, Bern, Switzerland, and G Gloeckler, University of Maryland, College Park, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 267-289 (1992). Relevant Web Sites: http://space.umd.edu/UMD_sensors/uls_swics.html
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This data set contains 3.5 hour averages of the solar wind ion density ratio (to O6+), velocity and temperature from the Ulysses Solar Wind Ion Composition Spectrometer. Velocity units are km/s. Temperature units are K. Data Set Contact: R von Steiger, International Space Science Institute, Bern, Switzerland. Principal Investigators: J Geiss, International Space Science Institute, Bern, Switzerland, and G Gloeckler, University of Maryland, College Park, Maryland, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 267-289 (1992). Relevant Web Sites: http://space.umd.edu/UMD_sensors/uls_swics.html
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This data set contains 1 hour averages of the magnetic field components (RTN) and field magnitude from the Vector Helium Magnetometer. Units are nT. Data Set Contact: R J Forsyth, The Blackett Laboratory, Imperial College, London, UK. Principal Investigator: A Balogh, The Blackett Laboratory, Imperial College, London, UK. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 221-236 (1992). Relevant Web Sites: http://www.sp.ph.ic.ac.uk/Ulysses/
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This data set contains 1 hour spin averaged count rates of the proton and ion data from the Ulysses Heliosphere Instrument for Spectra, Composition and Anisotropy at Low Energies (HI-SCALE) Composition Aperture Telescope at 60 degrees to the spacecraft spin axis. Count rate units are /s. Data Set Contact: T P Armstrong, Department of Physics & Astronomy, University of Kansas, USA. Principal Investigator: L J Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 349-363 (1992). Relevant Web Sites: http://sd-www.jhuapl.edu/Ulysses/ http://kuspa1.phsx.ukans.edu:8000/~ulysses/index.html
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This data set contains 1 hour spin averaged count rates of the ion data from the Ulysses Heliosphere Instrument for Spectra, Composition and Anisotropy at Low Energies (HI-SCALE) Composition Aperture Telescope at 60 degrees to the spacecraft spin axis (WARTD). Count rate units are /s. Data Set Contact: T P Armstrong, Department of Physics & Astronomy, University of Kansas, USA. Principal Investigator: L J Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ, USA. Reference: Astron. Astrophys. Suppl. Ser., 92(2), 349-363 (1992). Relevant Web Sites: http://sd-www.jhuapl.edu/Ulysses/ http://kuspa1.phsx.ukans.edu:8000/~ulysses/index.html
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This file contains the distribution function of protons. DATA REDUCTION: The SWOOPS (Solar Wind Observations Over the Poles of the Sun) ion instrument is a spherical-section curved-plate electrostatic analyzer. Particle arrival directions are measured in spacecraft coordinates of azimuth (scanned by spacecraft rotation) and elevation (determined by the detector number) angles. The spacecraft spin axis was oriented toward the Earth. The energy/charge (E/q) resolution was ~2.5% while the azimuth (phi) and elevation (theta) resolutions were both ~5.6o. A description of the SWOOPS is given in a paper by S. J. Bame, D. J. McComas, B. L. Barraclough, J. L. Phillips, K. J. Sofaly, J. C. Chavez, B. E. Goldstein, and R. K. Sakurai, Astronomy and Astrophysics Supplement Series, Ulysses Instruments Special Issue, Vol. 92, No. 2, p.237-265, 1992. The number of counts in each E/q-phi-theta bin were examined to determine the peak of the proton and alpha particle distribution, respectively, and the vector magnetic field (in spacecraft coordinates) was obtained for the time at which the peak was measured. A "coarse" 2-dimensional matrix was then formed by rotating the data into a coordinate system with axes parallel and perpendicular to the field direction. Note that gyrotropy is assumed in making that transformation. The resolution of the matrix is "coarse" because the vector velocity assigned to each bin was taken to be at the center of the bin. In reality, the counts in each bin were probably not smoothly distributed in velocity space over the bin, but were weighted toward the part of the bin nearest the center of the peak of the velocity distribution. The "coarse" distribution would thus yield values for the density and temperature that were higher than the true values. A correction for that effect was accomplished by fitting contours to the coarse distribution, breaking each bin or pixel into subpixels, and then using the contours and the calibrated angular responses to distribute the counts among the subpixels. New contours were then computed and the process was continued until it converged. More details about this deconvolution of the angular data are given in the appendix of a paper by Neugebauer, M., et al., "Ion distributions in large magnetic holes in the fast solar wind", J. Geophys. Res.,106, 5635, 2001. This procedure generated the matrix of velocity distribution functions of protons and alpha-particles parallel and perpendicular to the simultaneously measured magnetic field.
Log10 of the distribution function. The distribution function is a 50x25 matrix. At fixed time, the independent variables are "v_par" and "v_per". If at a given time v_par and/or v_per have a smaller number of elements than 50 and 25, respectively, then the undefined array entries of v_par and/or v_per and of the distribution function are set to FILLVAL=-1.E30.
50 element array.
25 element array
This file contains the parameters obtained by fitting data to a bi-maxwellian core-beam distribution. Under normal circumstances, the first (slow) population is the core and the second (fast) population is the beam. When the interplanetary magnetic field is folded back on itself due to turbulence or other processes the relation of the first and second populations to the core and beam, respectively, is reversed (see, e.g, M. Neugebauer and B. E. Goldstein, AIP Conf. Proc. 1539, 46, 2013). The vector magnetic field is given in RTN coordinates and it was obtained for the time at which the peak of the proton distribution function was measured. Only good fits are retained.
Data with "vft1">"vft2" are set to FILLVAL=-1E30. The parameter "denrat=(dnft1+dnft2)/dens" where "dens" is the value of the density found in the moments calculation, can be used as a further consistency check (ideally denrat = 1.0).
Data with "vft1">"vft2" are set to FILLVAL=-1E30. The parameter "denrat=(dnft1+dnft2)/dens" where "dens" is the value of the density found in the moments calculation, can be used as a further consistency check (ideally denrat = 1.0).
denrat=(dnft1+dnft2)/dens, where "dens" is the value of the density found in the moments calculation. It can be used as a further consistency check (ideally denrat = 1.0).
This file contains the moments obtained from the distribution function of protons after deconvolution using the same magnetic field values used to construct the matrices. The vector magnetic field and the particle velocity are given in inertial RTN coordinates. The magnetic field was obtained for the time at which the peak of the proton distribution function was measured. The particle velocity was obtained after rotating the fluid velocity from spacecraft to RTN coordinates and taking into account the spacecraft velocity. During periods of spacecraft nutation only the bulk speed and density are reliable, individual velocity components and temperatures are invalid. The beginning of scientifically useful SWOOPS data is at Day 322, 00:59 of 1990; at that time the spacecraft was already nutating; nutation ceased as of Day 351, 22:00, 1990. There are small systematic uncertainties in the velocity components. These are due to such effects as uncertainty in the accuracy of alignment on the spacecraft, relatively wide angular bins, variation in gains between channeltrons, etc. The velocity component data should not be used for studies of large scale, long term, solar wind deflection. The data are generally suitable for all other studies.