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Hawkeye Spacecraft Low Energy Proton-Electron Differential Energy Analyzer (LEPEDEA), ion moments

ResourceID
spase://NASA/NumericalData/Hawkeye/LEPEDEA/Level2/moments/PT80S

Description

This dataset is of the Hawkeye Spacecraft LEPEDEA ion moments made over the entire mission. Ion moments, treated as 100% protons, are derived from LEPEDEA ramp measurements, one ramp energy sweep takes 1.44 s, time between ion sweeps is 11.52s, spin period is about 11s, so about 21 sweeps are required for uniform coverage in the spin plane. The FOV is 8 degrees (spin-plane) x 30 degrees (out of spin pane), so the FOV covered over a spin is about pi of 4*pi steradians. The time step between moment computations varies between 70 and 110s and the time interval for a moment computation was typically 21x2 sweeps or 484s,so moment computation intervals overlapped. LEPEDEA is not a solar wind instrument. No correction for the external photo-electron sheath has been made, the impact is estimated to be small.

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Details

Version:2.5.0

NumericalData

ResourceID
spase://NASA/NumericalData/Hawkeye/LEPEDEA/Level2/moments/PT80S
ResourceHeader
ResourceName
Hawkeye Spacecraft Low Energy Proton-Electron Differential Energy Analyzer (LEPEDEA), ion moments
ReleaseDate
2023-06-12 10:04:41
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11
Note
Only known prior ReleaseDate of the metadata
Description

This dataset is of the Hawkeye Spacecraft LEPEDEA ion moments made over the entire mission. Ion moments, treated as 100% protons, are derived from LEPEDEA ramp measurements, one ramp energy sweep takes 1.44 s, time between ion sweeps is 11.52s, spin period is about 11s, so about 21 sweeps are required for uniform coverage in the spin plane. The FOV is 8 degrees (spin-plane) x 30 degrees (out of spin pane), so the FOV covered over a spin is about pi of 4*pi steradians. The time step between moment computations varies between 70 and 110s and the time interval for a moment computation was typically 21x2 sweeps or 484s,so moment computation intervals overlapped. LEPEDEA is not a solar wind instrument. No correction for the external photo-electron sheath has been made, the impact is estimated to be small.

Acknowledgement
S.A. Boardsen and R. L. Kessel: Hawkeye Data rehab project
Contacts
RolePersonStartDateStopDateNote
1.Scientist
MetadataContact
spase://SMWG/Person/Scott.Boardsen
2.Scientistspase://SMWG/Person/Ramona.L.Kessel
InformationURL
Name
Paper: Spin Index Determination of the Hawkeye Spacecraft
URL
Description

Authored by S. A. Boardsen and R. L. Kessel, Paper that used this dataset, the moments where used as part of the spin index validation.

AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
HTTPS from SPDF
URL
Description

In CDF via http from SPDF

AccessURL
Name
CDAWeb
URL
ProductKey
hk_lepedea_ion-moms
Description

Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb

Format
CDF
MeasurementType
EnergeticParticles