Wind Energetic Particle Acceleration, Composition and Transport (EPACT)/LEMT 1-Hr H,He,O,Fe Anisotropies for Events

2020-07-07 21:16:04Z

This data set contains hourly resolution anisotropies
in spacecraft and solar wind frames for 2.5-5 MeV/n H, He, O and Fe
nuclei, plus 5-8 MeV/n He nuclei. First-, second- and third-order
spacecraft-frame anisotropies, and the magnitude and direction angles,
relative to the mean magnetic field, of the spacecraft-frame first-order
anisotropy vectors are given. Ion spectral parameters used in anisotropy
determinations, namely spectral power law index (gamma), mean energy of
ions in sampled energy range, and ion flux at the mean energy, are given.
Many solar wind parameter averages are given, including magnetic field
magnitude and direction, solar wind density and flow speed and azimuthal
angle. Standard deviations in all hourly averages are also given. See
Tan et al, Ap.J.,661, 1297-1310, 2007, for discussions of anisotropies,
reference frames, etc. As of 10/2011, the data cover 39 1997-2006 multi-
day intervals that include energetic solar particle events. ASCII data
words are comma-separated. For a given particle event, there are
species-specific files. File naming uses the convention XX_a1s_YYYYMMDD,
where XX = H (or Hng), He2 (2.5-5 MeV/n), He5 (5-8 MeV/n), O or Fe, and
where YYYYMMDD is the day of the first record of the file. "Hng" means
hydrogen - no gamma (as obtained from IMP 8 GME data); but see the
readme file cited below on the use of EPACT/LEMT He data as providing
an alternative power law index.

Dr. Tycho T. Von Rosenvinge

spase://VEPO/NumericalData/Wind/EPACT/LEMT/Events/A1S/PT1H

spase://VSPO/NumericalData/Wind/EPACT/LEMT/Events/A1S/PT1H

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Please acknowledge Principal Investigator T. von Rosenvinge and the Wind EPACT team.

PT1H

Time

Column_1-Column_6

Universal time at start of hour average

PT1H

Magnitude of average magnetic field vector

Column_7

PT1H

nT

Standard deviation in magnitude of average magnetic field vector

Column_8

PT1H

nT

Latitude angle of average magnetic field vector

Column_9

PT1H

Deg

Standard deviation in elevation angle of average magnetic field vector

Column_10

PT1H

Deg

Azimuthal angle of average magnetic field vector

Column_11

PT1H

Deg

Standard deviation in azimuth angle of average magnetic field vector

Column_12

PT1H

Deg

Solar wind ion density

Column_15

PT1H

cm**-3

Standard deviation in solar wind ion density

Column_16

PT1H

cm**-3

Solar wind flow speed

Column_17

PT1H

1000km/s

Standard deviation in solar wind flow speed

Column_18

PT1H

1000km/s

Solar wind flow azimuth angle

Column_19

PT1H

Deg

Standard deviation in solar wind flow azimuth angle

Column_20

PT1H

Deg

Alfven speed

Column_21

PT1H

1000km/s

Gamma

Column_22

Spectral power law exponent

PT1H

Standard deviation in gamma

Column_23

Standard deviation in spectral power law exponent

PT1H

Mean particle energy

Column_24

Mean energy of ions in sampled energy range

PT1H

MeV/n

Ion flux at mean energy

Column_25

Logarithm of ion flux at mean particle energy

PT1H

(cm**2 sec ster MeV/n)**-1

First order anisotropy, spacecraft frame

Column_26

See Tan et al, Ap.J., 661, 1297, 2007

PT1H

unit-less

RMS deviation in spacecraft frame first order anisotropy

Column_27

See Tan et al, Ap.J., 661, 1297, 2007

PT1H

unit-less

Second order anisotropy, spacecraft frame

Column_28

See Tan et al, Ap.J., 661, 1297, 2007

PT1H

unit-less

RMS deviation in spacecraft frame second order anisotropy

Column_29

See Tan et al, Ap.J., 661, 1297, 2007

PT1H

unit-less

Third order anisotropy, spacecraft frame

Column_30

See Tan et al, Ap.J., 661, 1297, 2007

PT1H

unit-less

RMS deviation in spacecraft frame third order anisotropy

Column_31

See Tan et al, Ap.J., 661, 1297, 2007

PT1H

unit-less

Ion bulk flow speed

Column_32

Bulk flow speed of energetic ion population;
see Tan et al, Ap.J., 661, 1297, 2007

PT1H

1000km/s

RMS deviation in ion bulk flow speed

Column_33

PT1H

1000km/s

Longitude angle of ion bulk flow velocity

Column_34

PT1H

deg

RMS deviation in longitude angle of ion bulk flow velocity

Column_35

PT1H

Deg

Difference between flow and field longitude angles

Column_36

Difference between the longitude angles of the ion bulk flow
velocity and the magnetic field vectors

PT1H

deg

RMS deviation in difference between flow and field longitude angles

Column_37

PT1H

Deg

First order anisotropy, solar wind frame

Column_38

Magnitude of ion first order anisotropy in solar
wind frame; see Tan et al, Ap.J., 661, 1297, 2007

PT1H

unit-less

RMS deviation in solar wind frame frame first order anisotropy

Column_39

PT1H

unit-less

Longitude angle of first order anisotropy, solar wind frame

Column_40

Magnitude of ion first order anisotropy in solar
wind frame; see Tan et al, Ap.J., 661, 1297, 2007

PT1H

Deg

RMS deviation in longitude angle of solar-wind-frame first order anisotropy

Column_41

PT1H

deg

Component of first order anisotropy normal to magnetic field

Column_42

Component of solar-wind-frame first order anisotropy
vector perpendicular to mean magnetic field

PT1H

Unit-less

RMS deviation in component of first order anisotropy normal to magnetic field

Column_43

PT1H

Unit-less

Component of first order anisotropy parallel to magnetic field

Column_44

Component of solar-wind-frame first order anisotropy
vector parallel to mean magnetic field

PT1H

Unit-less

RMS deviation in component of first order anisotropy parallel to magnetic field

Column_45

PT1H

Unit-less