Ulysses Solar Wind Observations Over the Poles of the Sun (SWOOPS) Alpha Particle Distribution Function Fitting Parameters, Key Parameter (K0), 4 min Data

2022-05-25 12:34:56.789

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.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 Particle Distribution Function was measured. Only good Fits are retained.

D.J. McComas, B.E. Goldstein, M.M. Neugebauer, A. Tenerani

spase://VSPO/NumericalData/Ulysses/SWOOPS/AlphaParticle/ParticleDistributions/PT4M

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CDF

None

D.J. McComas, B.E. Goldstein, M.M. Neugebauer, A. Tenerani. Please acknowledge the Data Providers and CDAWeb when using these Data.

Online

Open

CSV

D.J. McComas, B.E. Goldstein, M.M. Neugebauer, A. Tenerani. Please acknowledge the Data Providers and CDAWeb when using these Data.

PT4M

Epoch Time

Epoch

Epoch Time

This Parameter exhibits an increasing Monotonic Progression.

PT4M

ms

1.0e-3>s

18-Nov-1990 00:00:00.000

01-Jul-2009 00:00:00.000

-1.0e+31

Heliographic Latitude, HG

Time Series defined by using: EPOCH

heliographicLatitude

Heliographic Latitude in Heliographic, HG, Coordinates

PT4M

°

0.0174532925>rad

-90.0

90.0

-1.0e+31

Heliocentric Distance

Time Series defined by using: EPOCH

heliocentricDistance

Heliocentric Distance

PT4M

ua

1.495978706961e11>m

0.0

99999.0

-1.0e+31

He+ Number Density, First Population

Time Series defined by using: EPOCH

dnft1

Alpha Particle, He+, Number Density, First Population

PT4M

cm^-3

1.0e6>m^-3

0.0

99999.0

-1.0e+31

He+ Number Density, Second Population

Time Series defined by using: EPOCH

dnft2

Alpha Particle, He+, Number Density, Second Population

PT4M

cm^-3

1.0e6>m^-3

0.0

99999.0

-1.0e+31

He+ Relative Speed, First Population

Time Series defined by using: EPOCH

vft1

Alpha Particle, He+, Speed of the First Population relative to the Speed parallel to the Magnetic Field, <v_par>

The Parameter "denrat" is equal to (dnft1+dnft2)/dens, where "dens" is the Value of the Density found in the Moments Calculation. This Value can be used as a further Consistency Check and ideally denrat would be equal to one. Data with vft1>vft2 are set to the FILLVAL, -1.0e30.

PT4M

km/s

1.0e3>m/s

-99999.0

99999.0

-1.0e+31

He+ Relative Speed, Second Population

Time Series defined by using: EPOCH

vft2

Alpha Particle, He+, Speed of the Second Population relative to the Speed parallel to the Magnetic Field, <v_par>

The Parameter "denrat" is equal to (dnft1+dnft2)/dens, where "dens" is the Value of the Density found in the Moments Calculation. This Value can be used as a further Consistency Check and ideally denrat would be equal to one. Data with vft1>vft2 are set to the FILLVAL, -1.0e30.

PT4M

km/s

1.0e3>m/s

-99999.0

99999.0

-1.0e+31

He+ Thermal Speed, Parallel, First Population

Time Series defined by using: EPOCH

wpar1

Alpha Particle, He+, Thermal Speed of the First Population parallel to the Magnetic Field

PT4M

km/s

1.0e3>m/s

0.0

999999.0

-1.0e+31

He+ Thermal Speed, Parallel, Second Population

Time Series defined by using: EPOCH

wpar2

Alpha Particle, He+, Thermal Speed of the Second Population parallel to the Magnetic Field

PT4M

km/s

1.0e3>m/s

0.0

999999.0

-1.0e+31

He+ Thermal Speed, Perpendicular, First Population

Time Series defined by using: EPOCH

wper1

Alpha Particle, He+, Thermal Speed of the First Population perpendicular to the Magnetic Field

PT4M

km/s

1.0e3>m/s

0.0

999999.0

-1.0e+31

He+ Thermal Speed, Perpendicular, Second Population

Time Series defined by using: EPOCH

wper2

Alpha Particle, He+, Thermal Speed of the Second Population perpendicular to the Magnetic Field

PT4M

km/s

1.0e3>m/s

0.0

999999.0

-1.0e+31

He+ T_par/T_perp, First Population

Time Series defined by using: EPOCH

anis1

Alpha Particle, He+, Temperature Ratio, Parallel/Perpendicular, First Population

PT4M

0.0

99999.0

-1.0e+31

He+ T_par/T_perp, Second Population

Time Series defined by using: EPOCH

anis2

Alpha Particle, He+, Temperature Ratio, Parallel/Perpendicular, Second Population

PT4M

0.0

99999.0

-1.0e+31

He+ Normalized Total Density

Time Series defined by using: EPOCH

denrat

Alpha Particle, He+, Normalized Total Density, equal to the Sum of the First and Second Population Densities divided by the Total Density: (dnft1+dnft2)/density

The Parameter "denrat" is equal to (dnft1+dnft2)/dens, where "dens" is the Value of the Density found in the Moments Calculation. This Value can be used as a further Consistency Check and ideally denrat would be equal to one. Data with vft1>vft2 are set to the FILLVAL, -1.0e30.

PT4M

0.0

999999.0

-1.0e+31

He+ Flow Speed

Time Series defined by using: EPOCH

V_MAG

Alpha Particle, He+, Velocity, Magnitude

PT4M

km/s

1.0e3>m/s

0.0

999999.0

-1.0e+31

He+ Alfven Speed

Time Series defined by using: EPOCH

Valf

Alpha Particle, He+, Alfven Speed

PT4M

km/s

1.0e3>m/s

0.0

99999.0

-1.0e+31

H+, He+ Streaming Speed

Time Series defined by using: EPOCH

Vap

Proton, H+, Alpha Particle, He+, Streaming Velocity, Magnitude

PT4M

km/s

1.0e3>m/s

0.0

99999.0

-1.0e+31

Magnetic Field BR Component, RTN

Time Series defined by using: EPOCH

BR

Magnetic Field BR Component in Inertial Radial, Tangential, Normal, RTN, Coordinates

PT4M

nT

1.0e-9>T

-9999.0

9999.0

-1.0e+31

Magnetic Field BT Component, RTN

Time Series defined by using: EPOCH

BT

Magnetic Field BT Component in Inertial Radial, Tangential, Normal, RTN, Coordinates

PT4M

nT

1.0e-9>T

-9999.0

9999.0

-1.0e+31

Magnetic Field BN Component, RTN

Time Series defined by using: EPOCH

BN

Magnetic Field BN Component in Inertial Radial, Tangential, Normal, RTN, Coordinates

PT4M

nT

1.0e-9>T

-9999.0

9999.0

-1.0e+31

Magnetic Field Magnitude

Time Series defined by using: EPOCH

B_MAG

Magnetic Field Magnitude

PT4M

nT

1.0e-9>T

0.0

9999.0

-1.0e+31