Van Allen Probe A Energetic Particle, Composition, and Thermal Plasma Suite (ECT) Helium Oxygen Proton Electron, HOPE, Mass Spectrometer Pitch Angle resolved Science Data. Electron Fluxes, 15 eV to 50 keV, and Ion Fluxes, 1 eV to 50 keV, as measured in alternate Spin Cadence, Level 3, Release #4 (L3), 11.35 s Data

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Van Allen Probe A, Energetic Particle, Composition, and Thermal Plasma Suite, ECT, Helium Oxygen Proton Electron, HOPE, Mass Spectrometer Pitch Angle resolved Science Data. Electron Fluxes from about 15 eV to 50 keV and Ion Fluxes from about 1 eV to 50 keV as measured in alternate Spin Cadence.

H.O. Funsten, R. Skoug, R. Friedel. Distribute freely, please acknowledge the original Principal Investigator. Please contact the Principal Investigator before any publication or Presentation of Data.

Van Allen Probes Home Page, Exploring Earth's Radiation Belts and the Extremes of Space Weather, Applied Physics Laboratory, Johns Hopkins University

Van Allen Probes Science Gateway for access to Data, Models, Software and Tools for Researchers, Students and the General Public, JHU/APL

Van Allen Probes Science Gateway for access to Data, Models, Software and Tools for Researchers, Students and the General Public at the Applied Physics Laboratory, Johns Hopkins University

Van Allen Probes Science Gateway, Mission Rules of the Road for Data Usage, JHU/APL

Van Allen Probes Science Gateway, Mission Rules of the Road for Data Usage, Applied Physics Laboratory at the Applied Physics Laboratory, Johns Hopkins University

Van Allen Probes Energetic Particle, Composition, and Thermal Plasma Suite, ECT, Home Page at the University of New Hampshire

Van Allen Probes Energetic Particle, Composition, and Thermal Plasma Suite, ECT, Science Operations Center, SOC, and Data Services Web Page at the Los Alamos National Laboratory

Van Allen Probes ECT SOC, Data Access Links to HOPE Particle Data, LANL

Van Allen Probes Energetic Particle, Composition, and Thermal Plasma Suite, ECT, Science Operations Center, SOC, Data Access Links to Pitch Angle resolved Helium Oxygen Proton Electron, HOPE, Mass Spectrometer Particle Web Site for access to Magnetic Field Data the Los Alamos National Laboratory

H.O. Funsten, R. Skoug, R. Friedel. Distribute freely, please acknowledge the original Principal Investigator. Please contact the Principal Investigator before any publication or Presentation of Data. Please acknowledge the Data Providers and CDAWeb when using these Data.

Note that the HOPE Instrument normally measures 72 Energy Steps. Before September 2013, adjacent Channels were combined for Downlink. The combined Values were then expanded on the Ground to recover the 72 Channels.

Electron Differential Flux Intensity, Omnidirectional, Energies from ~15 eV to ~50 keV

Flux integrated, piecewise constant, over 11 Pitch Angles and 20 Gyro Angles as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and over 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions.

Electron Differential Flux Intensity, Omnidirectional, Time Series Stack Plots

Electron Differential Flux Intensity, Omnidirectional, Time Series Stack Plots, Energies from ~15 eV to ~50 keV, with Perigee Mode excluded

Flux integrated, piecewise constant, over 11 Pitch Angles and 20 Gyro Angles as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and over 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function APPLY_ESA_QFLAG with the following input parameters: FEDO, Mode_Ele.

Electron Differential Flux Intensity, Unidirectional, Energy-Angle Plasmagrams

Electron Differential Flux Intensity, Unidirectional, Energy-Angle Plasmagrams, Energies from ~15 eV to ~50 keV. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

Electron Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions.

Electron Differential Flux Intensity, Unidirectional, Spectrograms by Energy at Sample Pitch Angles

Electron Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function APPLY_ESA_QFLAG with the following input parameters: FEDU, Mode_Ele.

Electron Differential Flux Intensity, Unidirectional, Spectrograms by Pitch Angle at Sample Energies

Proton Differential Flux Intensity, Omnidirectional, Spectrograms

Proton Differential Flux Intensity, Omnidirectional, Spectrograms, Energies from ~1 eV to ~50 keV

Proton Differential Flux Intensity, Omnidirectional, Time Series Stack Plots

Proton Differential Flux Intensity, Omnidirectional, Time Series Stack Plots, Energies from ~15 eV to ~50 keV, Perigee Mode excluded

Flux integrated, piecewise constant, over 11 Pitch Angles and 20 Gyro Angles as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and over 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function APPLY_ESA_QFLAG with the following input parameters: FPDO, Mode_Ion.

Proton Differential Flux Intensity, Unidirectional, Energy-Angle Plasmagrams

Proton Differential Flux Intensity, Unidirectional, Energy-Angle Plasmagrams, Energies from ~1 eV to ~50 keV. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

Proton Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions.

Proton Differential Flux Intensity, Unidirectional, Spectrograms by Energy at Sample Pitch Angles

Proton Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: FPDU.

Proton Differential Flux Intensity, Unidirectional, Spectrograms by Pitch Angle at Sample Energies

Proton Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function APPLY_ESA_QFLAG with the following input parameters: FPDU, Mode_Ion.

Oxygen Differential Flux Intensity, Omnidirectional, Spectrograms

Oxygen Differential Flux Intensity, Omnidirectional, Spectrograms, Energies from ~1 eV to ~50 keV

Oxygen Differential Flux Intensity, Omnidirectional, Time Series Stack Plots

Oxygen Differential Flux Intensity, Omnidirectional, Time Series Stack Plots, Energies from ~1 eV to ~50 keV, with Perigee Mode excluded

Flux integrated, piecewise constant, over 11 Pitch Angles and 20 Gyro Angles as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and over 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function APPLY_ESA_QFLAG with the following input parameters: FODO, Mode_Ion.

Oxygen Differential Flux Intensity, Unidirectional, Energy-Angle Plasmagrams

Oxygen Differential Flux Intensity, Unidirectional, Energy-Angle Plasmagrams, Energies from ~1 eV to ~50 keV. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

Oxygen Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions.

Oxygen Differential Flux Intensity, Unidirectional, Spectrograms by Energy at Sample Pitch Angles

Oxygen Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: FODU.

Oxygen Differential Flux Intensity, Unidirectional, Spectrograms by Pitch Angle at Sample Energies

Oxygen Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function APPLY_ESA_QFLAG with the following input parameters: FODU, Mode_Ion.

Helium Differential Flux Intensity, Omnidirectional, Spectrograms

Helium Differential Flux Intensity, Omnidirectional, Spectrograms, Energies from ~1 eV to ~50 keV

Helium Differential Flux Intensity, Omnidirectional, Time Series Stack Plots

Helium Differential Flux Intensity, Omnidirectional, Time Series Stack Plots, Energies from ~1 eV to ~50 keV, Perigee Mode excluded

Flux integrated, piecewise constant, over 11 Pitch Angles and 20 Gyro Angles as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and over 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function APPLY_ESA_QFLAG with the following input parameters: FHEDO, Mode_Ion.

Helium Differential Flux Intensity, Unidirectional, Energy-Angle Plasmagrams

Helium Differential Flux Intensity, Unidirectional, Energy-Angle Plasmagrams, Energies from ~1 eV to ~50 keV. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

Helium Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions.

Helium Differential Flux Intensity, Unidirectional, Spectrograms by Energy at Sample Pitch Angles

Helium Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: FHEDU.

Helium Differential Flux Intensity, Unidirectional, Spectrograms by Pitch Angle at Sample Energies

Helium Flux as a Function of 11 Pitch Angles, as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis, and 72 Energies. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. This parameter is virtual. It is calculated by calling the function APPLY_ESA_QFLAG with the following input parameters: FHEDU, Mode_Ion.

Flags to indicate potential Issues with Electron Data. Each Element of this Array contains the Flag Status for a particular Concern. A Value of Zero of r a particular File Type indicates no unusual Concerns of that Type for that Time Sample. Increasing Flag Values indicate increasing Concern. See the FLAGS Variable for a Description of each Element.

Flags to indicate potential Issues with Ion Data. Each Element of this Array contains the Flag Status for a particular Concern. A Value of Zero of r a particular File Type indicates no unusual Concerns of that Type for that Time Sample. Increasing Flag Values indicate increasing Concern. See the FLAGS Variable for a Description of each Element.

Indicates the Instrument Mode for the Data Collection. Each Instrument Mode has a different Set of Energy Channels. See the corresponding HOPE_ENERGY_Electron Record. 0=Apogee Mode: Normal Operation, 1=Perigee Mode: Minimum Energy Channel raised during the Pass through Perigee, 2=Burst Mode: Subset of Energies sampled at rapid Cadence.

Counts summed over over 72 Energies and over 20 Gyro Angles and 11 Pitch Angles as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions.

HOPE Electron Differential Counts, Directional, not for Plotting. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

Counts as a Function of 72 Energies and 11 Pitch Angles as computed by using the Magnetic Field Direction crossed with the Spacecraft Spin Axis. Note that the Data have been expanded to the highest possible Resolution. Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions. The Counts are summed over all Measurements in each Pitch Angle/Gyro Angle Bin.

HOPE Proton Differential Counts, Directional, not for Plotting. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

HOPE Helium Differential Counts, Directional, not for Plotting. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

HOPE Oxygen Differential Counts, Directional, not for Plotting. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

Number of Samples in the Summation, Electron Differential Flux Intensity, Omnidirectional

Number of Samples in the Summation, Electron Differential Flux Intensity, Omnidirectional, not for Plotting

Number of Samples used in computing the Flux summed over Pitch Angle. Note that the Data have been expanded to the highest possible Resolution (16 Spin angles, 72 Energies). Before September 2013, the transmitted Data were collapsed to 36 Energies and 4-8-16-8-4 Spin Angles in order to meet Telemetry Allocation Restrictions.

Number of Samples in the Summation, Electron Differential Flux Intensity, Unidirectional

Number of Samples in the Summation, Electron Differential Flux Intensity, Unidirectional, not for Plotting. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

Number of Samples in the Summation, Ion Differential Flux Intensity, Omnidirectional

Number of Samples in the Summation, Ion Differential Flux Intensity, Omnidirectional, not for Plotting

Number of Samples in the Summation, Ion Differential Flux Intensity, Unidirectional

Number of Samples in the Summation, Ion Differential Flux Intensity, Unidirectional, not for Plotting. Column 1 Labels from PITCH_ANGLE: [ 4.50000, 18.0000, 36.0000, 54.0000, 72.0000, 90.0000, 108.000, 126.000, 144.000, 162.000, 175.500]

The Model Magnetic Field Data was interpolated from the 1 min Magnetic Field Ephemeris Time Resolution to match the Electron Measurement Time Base. Calculated by using the LANLGeoMag Software Library. Internal Magnetic Field Model: International Geomagnetic Reference Field, IGRF. External Magnetic Field Model: Olson-Pfitzer 1977 Quiet, OP77Q. Average Type: standard

The Model Magnetic Field Data was interpolated from the 1 min Magnetic Field Ephemeris Time Resolution to match the Ion Measurement Time Base. Calculated by using the LANLGeoMag Software Library. Internal Magnetic Field Model: International Geomagnetic Reference Field, IGRF. External Magnetic Field Model: Olson-Pfitzer 1977 Quiet, OP77Q. Average Type: standard

Model Magnetic Field Magnitude, Magnetic Equator, Electron Time Base

Spacecraft Position, Magnetic Local Time, MLT, in Hours, Electron Time Base

Spacecraft Position, Magnetic Local Time, MLT, in Hours, Ion Time Base

Spacecraft Position Vector, Geographic Cartesian Coordinates, Electrons

Spacecraft Position Vector, Geographic, GEO, Cartesian Coordinates, Electron Time Base

The Origin is the Center of Mass of the Earth. The X-Axis points to the Intersection of the Greenwich Meridian and Geographic Equator. The Z Axis points to the Geographic North Pole. The Y Axis completes the Right-Handed Cartesian Triad with Y = -X × Z.

Spacecraft Position Vector, Geographic Cartesian Coordinates, Ions

Spacecraft Position Vector, Geographic, GEO, Cartesian Coordinates, Ion Time Base

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