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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:2.7.1

MetadataRightsList

Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions

Version:2.7.1

NumericalData

ResourceID
spase://NASA/NumericalData/Hawkeye/LEPEDEA/Level2/moments/PT80S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Hawkeye Spacecraft Low Energy Proton-Electron Differential Energy Analyzer (LEPEDEA), ion moments
ReleaseDate
2025-12-04 13:29:19Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-05-14 10:04:41Z
Note
Added ObservedRegion. JMW
RevisionEvent
ReleaseDate
2025-12-04 13:29:19Z
Note
Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB
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
https://doi.org/10.2514/2.3879
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
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
HTTPS from SPDF
URL
https://cdaweb.gsfc.nasa.gov/pub/data/hawkeye/lepedea/
Description

In CDF via http from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=HK_LEPEDEA_ION-MOMS&index=sp_phys
ProductKey
hk_lepedea_ion-moms
Description

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

Format
CDF
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1974-06-08 00:00:00.000Z
StopDate
1974-06-08 23:59:59.000Z
Cadence
PT3M
ObservedRegion
Earth.NearSurface.Ionosphere
ObservedRegion
Earth.Magnetosphere