ECT-HOPE-PA-L3>ECT Helium Oxygen Proton Electron Plasma Analyszer Fluxes by Pitch Angle Level 3 

Pitch angle resolved ECT-HOPE science data.  Electron fluxes ~15-50,000 eV, ion fluxes ~1-50,000 eV. Electrons and ions measured in alternate spin cadence. 

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Electron flux integrated (piecewise constant) over pitch angle (11) and gyro angle (20) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

Energy for electron measurements. Note that HOPE normally measures 72 energy steps; before 9/2013 adjacent channels were combined for downlink. Those are then expanded on the ground into 72 channels again.

FEDU: Unidirectional Differential Electron Flux ~15-50,000 eV, in 72 energy and 11 pitch angle bins (energy-angle displays)

Electron flux as a function of pitch angle (11) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

---> Spectrograms by energy at sample pitch angles (perigee mode excluded)

spectrogram>y=HOPE_ENERGY_Ele, z=FEDU_byE_atA(1,*), z=FEDU_byE_atA(2,*), z=FEDU_byE_atA(3,*), z=FEDU_byE_atA(4,*), z=FEDU_byE_atA(5,*), z=FEDU_byE_atA(6,*), z=FEDU_byE_atA(7,*), z=FEDU_byE_atA(8,*), z=FEDU_byE_atA(9,*), z=FEDU_byE_atA(10,*), z=FEDU_byE_atA(11,*)

---> Spectrograms by pitch angle at sample energies (perigee mode excluded)

spectrogram>y=PITCH_ANGLE,z=FEDU_byA_atE(*,1), z=FEDU_byA_atE(*,6), z=FEDU_byA_atE(*,11),z=FEDU_byA_atE(*,16), z=FEDU_byA_atE(*,21), z=FEDU_byA_atE(*,26), z=FEDU_byA_atE(*,31), z=FEDU_byA_atE(*,36), z=FEDU_byA_atE(*,41), z=FEDU_byA_atE(*,46), z=FEDU_byA_atE(*,51), z=FEDU_byA_atE(*,56), z=FEDU_byA_atE(*,61), z=FEDU_byA_atE(*,66), z=FEDU_byA_atE(*,72)

Proton flux integrated (piecewise constant) over pitch angle (11) and gyro angle (20) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

Energy for Ion measuremnts. Note that HOPE normally measures 72 energy steps; before 9/2013 adjacent channels were combined for downlink.  Those are then expanded on the ground into 72 channels again.

FPDU: Unidirectional Differential Proton Flux ~1-50,000 eV, in 72 energy and 11 pitch angle bins (energy-angle displays)

Proton flux as a function of pitch angle (11) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

spectrogram>y=HOPE_ENERGY_Ion, z=FPDU_byE_atA(1,*), z=FPDU_byE_atA(2,*), z=FPDU_byE_atA(3,*), z=FPDU_byE_atA(4,*), z=FPDU_byE_atA(5,*), z=FPDU_byE_atA(6,*), z=FPDU_byE_atA(7,*), z=FPDU_byE_atA(8,*), z=FPDU_byE_atA(9,*),  z=FPDU_byE_atA(10,*), z=FPDU_byE_atA(11,*)

---> Spectrograms by pitch angle at sample energies (perigees excluded)

spectrogram>y=PITCH_ANGLE,z=FPDU_byA_atE(*,1), z=FPDU_byA_atE(*,6), z=FPDU_byA_atE(*,11),z=FPDU_byA_atE(*,16), z=FPDU_byA_atE(*,21), z=FPDU_byA_atE(*,26), z=FPDU_byA_atE(*,31), z=FPDU_byA_atE(*,36), z=FPDU_byA_atE(*,41), z=FPDU_byA_atE(*,46), z=FPDU_byA_atE(*,51), z=FPDU_byA_atE(*,56), z=FPDU_byA_atE(*,61), z=FPDU_byA_atE(*,66), z=FPDU_byA_atE(*,72)

Oxygen flux integrated (piecewise constant) over pitch angle (11) and gyro angle (20) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

FODU: Unidirectional Differential Oxygen Flux ~1-50,000 eV, in 72 energy and 11 pitch angle bins (energy-angle displays)

Oxygen flux as a function of pitch angle (11) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

spectrogram>y=HOPE_ENERGY_Ion, z=FODU_byE_atA(1,*), z=FODU_byE_atA(2,*), z=FODU_byE_atA(3,*), z=FODU_byE_atA(4,*), z=FODU_byE_atA(5,*), z=FODU_byE_atA(6,*), z=FODU_byE_atA(7,*), z=FODU_byE_atA(8,*), z=FODU_byE_atA(9,*), z=FODU_byE_atA(10,*), z=FODU_byE_atA(11,*)

spectrogram>y=PITCH_ANGLE,z=FODU_byA_atE(*,1), z=FODU_byA_atE(*,6), z=FODU_byA_atE(*,11),z=FODU_byA_atE(*,16), z=FODU_byA_atE(*,21), z=FODU_byA_atE(*,26), z=FODU_byA_atE(*,31), z=FODU_byA_atE(*,36), z=FODU_byA_atE(*,41), z=FODU_byA_atE(*,46), z=FODU_byA_atE(*,51), z=FODU_byA_atE(*,56), z=FODU_byA_atE(*,61), z=FODU_byA_atE(*,66), z=FODU_byA_atE(*,72)

Helium flux integrated (piecewise constant) over pitch angle (11) and gyro angle (20) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

FHEDU: Unidirectional Differential Helium Flux ~1-50,000 keV, in 72 energy and 11 pitch angle bins (energy-angle displays)

Helium flux as a function of pitch angle (11) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

spectrogram>y=HOPE_ENERGY_Ion, z=FHEDU_byE_atA(1,*), z=FHEDU_byE_atA(2,*), z=FHEDU_byE_atA(3,*), z=FHEDU_byE_atA(4,*), z=FHEDU_byE_atA(5,*), z=FHEDU_byE_atA(6,*), z=FHEDU_byE_atA(7,*), z=FHEDU_byE_atA(8,*), z=FHEDU_byE_atA(9,*), z=FHEDU_byE_atA(10,*), z=FHEDU_byE_atA(11,*) 

spectrogram>y=PITCH_ANGLE,z=FHEDU_byA_atE(*,1), z=FHEDU_byA_atE(*,6), z=FHEDU_byA_atE(*,11),z=FHEDU_byA_atE(*,16), z=FHEDU_byA_atE(*,21), z=FHEDU_byA_atE(*,26), z=FHEDU_byA_atE(*,31), z=FHEDU_byA_atE(*,36), z=FHEDU_byA_atE(*,41), z=FHEDU_byA_atE(*,46), z=FHEDU_byA_atE(*,51), z=FHEDU_byA_atE(*,56), z=FHEDU_byA_atE(*,61), z=FHEDU_byA_atE(*,66), z=FHEDU_byA_atE(*,72)

Count rate issue. 0:at least 10 counts in this sample; 1: 10>counts>=3; 2: 3>counts>=1; 3: flux below the one-count level.

Eclipse. 0: s/c not in eclipse; 1: s/c in eclipse at time of measurement.                                                 

Reserved                                                                                                                  

Flags to indicate potential issues with electron data. Each element of this array contains the flag status for a particular concern. A flag value of zero indicates no unusual concerns of that type for that time sample. Increasing flag values indicate increasing concern. See FLAGS variable for a description of each element.

Indicates instrument mode for electron data. Each mode has a different set of energy channels. See corresponding HOPE_ENERGY_Ion record. (0) Apogee mode: normal operation. (1) Perigee mode: minimum energy channel raised during pass through perigee. (2) burst mode: subset of energies sampled at rapid cadence.

Indicates instrument mode for ion data. Each mode has a different set of energy channels. See corresponding HOPE_ENERGY_Ion record. (0) Apogee mode: normal operation. (1) Perigee mode: minimum energy channel raised during pass through perigee.

Electron counts summed over pitch angle (11) and gyro angle (20) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation. Counts are summed over all measurements in a PA/gyro bin.

Electron counts as a function of pitch angle (11) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation. Counts are summed over all measurements in a PA/gyro bin.

Proton counts summed over pitch angle (11) and gyro angle (20) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation. Counts are summed over all measurements in a PA/gyro bin.

Proton counts as a function of pitch angle (11) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation. Counts are summed over all measurements in a PA/gyro bin.

Helium counts summed over pitch angle (11) and gyro angle (20) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation. Counts are summed over all measurements in a PA/gyro bin.

Helium counts as a function of pitch angle (11) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation. Counts are summed over all measurements in a PA/gyro bin.

Oxygen counts summed over pitch angle (11) and gyro angle (20) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation. Counts are summed over all measurements in a PA/gyro bin.

Oxygen counts as a function of pitch angle (11) as computed from magnetic field direction crossed with spacecraft spin axis and energy (72).  Note that data have been expanded to the highest possible resolution, even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation. Counts are summed over all measurements in a PA/gyro bin.

Number of samples used in computing the flux summed over pitch angle.  Note that data have been expanded to the highest possible resolution (16 spin angles, 72 energies), even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

Number of samples used in computing the flux as a function of pitch angle.  Note that data have been expanded to the highest possible resolution (16 spin angles, 72 energies), even though before 9/2013 the transmitted data are collapsed (36 energies, 4-8-16-8-4 spin angles) to fit the telemetry allocation.

Interpolated to electron measurement timebase from 1 min. resolution MagEphem file. Calculated with LANLGeomag library. Internal field: IGRF. External field: OP77Q.

Interpolated to ion measurement timebase from 1 min. resolution MagEphem file. Calculated with LANLGeomag library. Internal field: IGRF. External field: OP77Q.

Model magnetic field strength at magnetic equator (electron timebase)

---> Model magnetic field strength at magnetic equator (ion timebase)

Position of the satellite in geographic coordinates (electron timebase)

Origin = Earths center of mass. X = Intersection of Greenwich meridian and geographic equator. Z = Geographic North Pole. Y = completes a right-handed Cartesian triad. Interpolated to electron measurement timebase from 1 min. resolution MagEphem file.

---> Position of the satellite in geographic coordinates (ion timebase)

[Labels on plots] Position of the satellite in geographic coordinates (ele)

Origin = Earths center of mass. X = Intersection of Greenwich meridian and geographic equator. Z = Geographic North Pole. Y = completes a right-handed Cartesian triad

Calculated using ONERA-DESP library Internal field: DGRF/IGRF External field: Olson & Pfitzer quiet

---> Calculated magnetic field strength at magnetic equator (ele)

[Labels on plots] Position of the satellite in geographic coordinates (ion)

---> Calculated magnetic field strength at magnetic equator(ion)


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