Data Description

This page summarizes information about the selected resource and its origin based on SPASE metadata.

Table of Contents

  1. Product
  2. Repository
  3. Instrument
  4. Observatory
  5. Persons

SPASE version 2.2.1

Numerical Data Product: Wind EPACT/LEMT 1-Hr H,He,O,Fe Anisotropies for Events

Resource ID
spase://VEPO/NumericalData/Wind/EPACT/LEMT/Events/A1S/PT1H Get XML
Name
Wind EPACT/LEMT 1-Hr H,He,O,Fe Anisotropies for Events
Description

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.

Additional information
Readme file
Acknowledgement

Dr. Tycho T. Von Rosenvinge

Contact
Role Person
1. Principal investigator Dr. Tycho T. Von Rosenvinge Get XML
2. CoInvestigator Dr. Donald V. Reames Get XML
3. Data producer Lun C. Tan Get XML
Release date
2011-12-12 00:00:00
Repository
Name
Wind Spacecraft Home Page and Data Repository Get XML
Availability
Online
Access rights
Open
URL
Wind repository

File-level access to event-specific, species-specific ASCII files

Format
Text
Acknowledgement

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

Processing level
Calibrated
Instrument
Energetic Particle Acceleration, Composition and Transport (EPACT) Get XML
Measurement type
Energetic particles
Temporal description
Start date
1997-11-03 00:00:00
Stop date
2006-12-17 00:00:00
Cadence
1 hour
Observed regions
Heliosphere.NearEarth

Parameters

Parameter #1

Name
Time
Parameter key
Column_1-Column_6
Description

Universal time at start of hour average

Cadence
1 hour
Structure
Size
6
Description

Year, month, day, hour at start of average, and fractional day of year and fractional day of month at midpoint of average

Parameter type
Temporal

Parameter #2

Name
Magnitude of average magnetic field vector
Parameter key
Column_7
Cadence
1 hour
Units
nT
Quantity
Magnetic field
Qualifier
Magnitude

Parameter #3

Name
Standard deviation in magnitude of average magnetic field vector
Parameter key
Column_8
Cadence
1 hour
Units
nT
Quantity
Magnetic field
Qualifier
Standard deviation

Parameter #4

Name
Latitude angle of average magnetic field vector
Parameter key
Column_9
Cadence
1 hour
Units
Deg
Quantity
Magnetic field
Qualifier
Elevation angle

Parameter #5

Name
Standard deviation in elevation angle of average magnetic field vector
Parameter key
Column_10
Cadence
1 hour
Units
Deg
Quantity
Magnetic field
Qualifier
Elevation angle
Standard deviation

Parameter #6

Name
Azimuthal angle of average magnetic field vector
Parameter key
Column_11
Cadence
1 hour
Units
Deg
Quantity
Magnetic field
Qualifier
Azimuth angle

Parameter #7

Name
Standard deviation in azimuth angle of average magnetic field vector
Parameter key
Column_12
Cadence
1 hour
Units
Deg
Quantity
Magnetic field
Qualifier
Elevation angle
Standard deviation

Parameter #8

Name
Solar wind ion density
Parameter key
Column_15
Cadence
1 hour
Units
cm**-3
Particle type
Ion
Quantity
Number density

Parameter #9

Name
Standard deviation in solar wind ion density
Parameter key
Column_16
Cadence
1 hour
Units
cm**-3
Particle type
Ion
Quantity
Number density
Qualifier
Standard deviation

Parameter #10

Name
Solar wind flow speed
Parameter key
Column_17
Cadence
1 hour
Units
1000km/s
Particle type
Ion
Quantity
Flow speed

Parameter #11

Name
Standard deviation in solar wind flow speed
Parameter key
Column_18
Cadence
1 hour
Units
1000km/s
Particle type
Ion
Quantity
Flow speed
Qualifier
Standard deviation

Parameter #12

Name
Solar wind flow azimuth angle
Parameter key
Column_19
Cadence
1 hour
Units
Deg
Particle type
Ion
Quantity
Flow velocity
Qualifier
Azimuth angle

Parameter #13

Name
Standard deviation in solar wind flow azimuth angle
Parameter key
Column_20
Cadence
1 hour
Units
Deg
Particle type
Ion
Quantity
Flow velocity
Qualifier
Azimuth angle
Standard deviation

Parameter #14

Name
Alfven speed
Parameter key
Column_21
Cadence
1 hour
Units
1000km/s
Quantity
Alfven speed

Parameter #15

Name
Gamma
Parameter key
Column_22
Description

Spectral power law exponent

Cadence
1 hour
Parameter type
Other

Parameter #16

Name
Standard deviation in gamma
Parameter key
Column_23
Description

Standard deviation in spectral power law exponent

Cadence
1 hour
Parameter type
Other

Parameter #17

Name
Mean particle energy
Parameter key
Column_24
Description

Mean energy of ions in sampled energy range

Cadence
1 hour
Units
MeV/n
Particle type
Ion
Quantity
Energy
Qualifier
Average

Parameter #18

Name
Ion flux at mean energy
Parameter key
Column_25
Description

Logarithm of ion flux at mean particle energy

Cadence
1 hour
Units
(cm**2 sec ster MeV/n)**-1
Particle type
Ion
Quantity
Number flux

Parameter #19

Name
First order anisotropy, spacecraft frame
Parameter key
Column_26
Description

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

Cadence
1 hour
Units
unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Anisotropy

Parameter #20

Name
RMS deviation in spacecraft frame first order anisotropy
Parameter key
Column_27
Description

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

Cadence
1 hour
Units
unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Standard deviation
Anisotropy

Parameter #21

Name
Second order anisotropy, spacecraft frame
Parameter key
Column_28
Description

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

Cadence
1 hour
Units
unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Anisotropy

Parameter #22

Name
RMS deviation in spacecraft frame second order anisotropy
Parameter key
Column_29
Description

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

Cadence
1 hour
Units
unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Standard deviation
Anisotropy

Parameter #23

Name
Third order anisotropy, spacecraft frame
Parameter key
Column_30
Description

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

Cadence
1 hour
Units
unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Anisotropy

Parameter #24

Name
RMS deviation in spacecraft frame third order anisotropy
Parameter key
Column_31
Description

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

Cadence
1 hour
Units
unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Standard deviation
Anisotropy

Parameter #25

Name
Ion bulk flow speed
Parameter key
Column_32
Description

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

Cadence
1 hour
Units
1000km/s
Particle type
Ion
Quantity
Flow speed

Parameter #26

Name
RMS deviation in ion bulk flow speed
Parameter key
Column_33
Cadence
1 hour
Units
1000km/s
Particle type
Ion
Quantity
Flow speed
Qualifier
Standard deviation

Parameter #27

Name
Longitude angle of ion bulk flow velocity
Parameter key
Column_34
Cadence
1 hour
Units
deg
Particle type
Ion
Quantity
Flow velocity
Qualifier
Azimuth angle

Parameter #28

Name
RMS deviation in longitude angle of ion bulk flow velocity
Parameter key
Column_35
Cadence
1 hour
Units
Deg
Particle type
Ion
Quantity
Flow velocity
Qualifier
Standard deviation
Azimuth angle

Parameter #29

Name
Difference between flow and field longitude angles
Parameter key
Column_36
Description

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

Cadence
1 hour
Units
deg
Particle type
Ion
Quantity
Flow velocity
Qualifier
Azimuth angle

Parameter #30

Name
RMS deviation in difference between flow and field longitude angles
Parameter key
Column_37
Cadence
1 hour
Units
Deg
Particle type
Ion
Quantity
Flow velocity
Qualifier
Standard deviation
Azimuth angle

Parameter #31

Name
First order anisotropy, solar wind frame
Parameter key
Column_38
Description

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

Cadence
1 hour
Units
unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Anisotropy

Parameter #32

Name
RMS deviation in solar wind frame frame first order anisotropy
Parameter key
Column_39
Cadence
1 hour
Units
unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Standard deviation
Anisotropy

Parameter #33

Name
Longitude angle of first order anisotropy, solar wind frame
Parameter key
Column_40
Description

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

Cadence
1 hour
Units
Deg
Particle type
Ion
Quantity
Number flux
Qualifier
Azimuth angle
Anisotropy

Parameter #34

Name
RMS deviation in longitude angle of solar-wind-frame first order anisotropy
Parameter key
Column_41
Cadence
1 hour
Units
deg
Particle type
Ion
Quantity
Number flux
Qualifier
Standard deviation
Azimuth angle
Anisotropy

Parameter #35

Name
Component of first order anisotropy normal to magnetic field
Parameter key
Column_42
Description

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

Cadence
1 hour
Units
Unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Component
Anisotropy

Parameter #36

Name
RMS deviation in component of first order anisotropy normal to magnetic field
Parameter key
Column_43
Cadence
1 hour
Units
Unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Standard deviation
Component
Anisotropy

Parameter #37

Name
Component of first order anisotropy parallel to magnetic field
Parameter key
Column_44
Description

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

Cadence
1 hour
Units
Unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Component
Anisotropy

Parameter #38

Name
RMS deviation in component of first order anisotropy parallel to magnetic field
Parameter key
Column_45
Cadence
1 hour
Units
Unit-less
Particle type
Ion
Quantity
Number flux
Qualifier
Standard deviation
Component
Anisotropy

SPASE version 2.0.0

Instrument: Energetic Particle Acceleration, Composition and Transport (EPACT)

Instrument ID
spase://SMWG/Instrument/Wind/EPACT Get XML
Name
Energetic Particle Acceleration, Composition and Transport (EPACT)
Description

The EPACT (energetic particle acceleration-composition-transport) experiment is designed to provide a comprehensive study of energetic particle acceleration and transport processes in solar flares, in the interplanetary medium and in planetary magnetospheres as well as in galactic cosmic rays and the anomalous cosmic ray component. The instrument provides a complete description of electrons and atomic nuclei of different charge and isotopic composition over an energy range from 0.1 to 500 MeV/nucleon, and extending up to Z=92 (uranium). The instrument is divided into three semi-autonomous subsystems, the low energy angular distribution telescopes (LEAD), the low energy matrix telescopes (LEMT), and the electron/isotope telescope (ELITE). There are four individual LEAD sensors, two which view the hemisphere above the spin plane, and two pointed below the spin plane. There are also three LEMT sensors which are oriented above, below, and into the spin plane, and a single ELITE sensor which is double ended.

Additional information
NSSDC's Master Catalog

Information about the Energetic Particle Acceleration, Composition and Transport (EPACT) experiment on the Wind mission.

Contact
Role Person
1. Principal investigator Dr. Tycho T. Von Rosenvinge Get XML
Release date
2011-08-17 21:10:14
Instrument type
Energetic Particle Instrument
Investigation name
Energetic Particle Acceleration, Composition and Transport (EPACT) on Wind
Observatory
Wind Get XML

SPASE version 2.2.0

Observatory: Wind

Observatory ID
spase://SMWG/Observatory/Wind Get XML
Name
Wind
Alternate name
ISTP/Wind
GGS/Wind
Wind/ISTP
Wind/GGS
Description

The Wind spacecraft was launched on November 1, 1994 and is the first of two NASA spacecraft in the Global Geospace Science initiative and part of the ISTP Project. The science objectives of the Wind mission are: (1) Provide complete plasma, energetic particle, and magnetic field input for magnetospheric and ionospheric studies; (2) Determine the magnetospheric output to interplanetary space in the up-stream region; (3) Investigate basic plasma processes occurring in the near-Earth solar wind; and (4) Provide baseline ecliptic plane observations to be used in heliospheric latitudes from ULYSSES. Wind has on-board propulsion and its design lifetime is three to five years, with redundant subsystems. Wind is cylindrical, approximately 2.8 m in diameter by 1.25 m high, with body-mounted solar cells. It has long wire spin-plane antennas, inertial booms, and spin-plane appendages to support sensors. Wind has experiment booms deployed along both Z axes. The spin rate is 20 rpm around an axis within 1 degree of normal to the ecliptic. Data are stored using on-board tape recorders and are relayed to the Deep Space Network at one of two rates: 5.5 or 11.1 kbps. For the first nine months of operation, Wind was placed in a double-lunar swingby orbit near the ecliptic plane, with apogee from 80 to 250 Earth radii and perigee of between 5 and 10 Earth radii. In this orbit, lunar gravity assists were used to keep its apogee over the day hemisphere of the Earth, and magnetospheric observations are made. Wind was then inserted into a small "halo" orbit, about the sunward Sun-Earth gravitational equilibrium point (L1), varying from 235 to 265 Earth radii. In this orbit Wind measures the incoming solar wind, magnetic fields and particles continuously and provides an approximately one-hour warning to the other ISTP spacecraft of changes in the solar wind. In 2001 and 2002 Wind has executed a distant prograde orbit that took it +/- 300 Re leading and legging Earth. This orbit provided a wide baseline to study solar wind structures and correlations. In 2003, Wind reached the L2 Lagrange point 240 Re anti-sunward from Earth providing a 500 Re spatial separation from ACE solar wind observations along with measurements of the distant Earth magnetotail. Since 2004, Wind has been permanently parked in a L1 halo orbit where it continues to provide high-quality solar wind measurements.

Additional information
Wind Spacecraft Home Page
NSSDC's Master Catalog

Information about the Wind mission

Contact
Role Person
1. Project scientist Dr. Adam Szabo Get XML
Release date
2011-08-17 18:19:11
Prior ID
spase://vspo/observatory/84
Location
Region
Earth.Magnetosheath
Earth.Magnetosphere
Earth.Magnetosphere.Magnetotail
Earth.Magnetosphere.Main
Heliosphere.Inner
Heliosphere.NearEarth

SPASE version 2.2.0

Person: Dr. Tycho T. Von Rosenvinge

Name
Dr. Tycho T. Von Rosenvinge
Organization
GSFC-Code 661
Person ID
spase://SMWG/Person/Tycho.T.Von.Rosenvinge Get XML

SPASE version 2.2.0

Person: Dr. Donald V. Reames

Name
Dr. Donald V. Reames
Organization
GSFC-Code 661
Person ID
spase://SMWG/Person/Donald.V.Reames Get XML

SPASE version 2.2.1

Person: Lun C. Tan

Name
Lun C. Tan
Organization
U. Maryland (at GSFC)
Email
lun.c.tan@nasa.gov
Person ID
spase://SMWG/Person/Lun.C.Tan Get XML

SPASE version 2.2.0

Person: Dr. Adam Szabo

Name
Dr. Adam Szabo
Organization
NASA Goddard Space Flight Center
Address
Code 672, Greenbelt, MD 20771, USA
Email
adam.szabo@nasa.gov
Phone
+1 301 286 5726
Person ID
spase://SMWG/Person/Adam.Szabo Get XML
Release date
2010-08-05 17:35:45

SPASE version 1.2.0

Repository: Wind Spacecraft Home Page and Data Repository

Repository ID
spase://SMWG/Repository/NASA/GSFC/Wind Get XML
Name
Wind Spacecraft Home Page and Data Repository
Description

Data Repository for Wind data files as well as instrument descriptions and related links for the Wind mission.

Additional information
Wind Spacecraft Home Page

Wind home page with description of instruments and access to data files.

Contact
Role Person
1. Data producer

Scientist
Dr. Adam Szabo Get XML
Release date
2011-08-18 15:54:53
Prior IDs
spase://VHO/Repository/WIND/MFI
spase://SMWG/Repository/NASA/GSFC/WIND_MFI
spase://SMWG/Repository/NASA/GSFC/WIND
Access URL