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Data Access

Helios 2 Daily Trajectory Data

ResourceID
spase://NASA/NumericalData/Helios2/Ephemeris/PT24H

Description

This data set contains orbital parameters for Helios 2: Helios-Sun distance, heliographic longitude from the ascending node, heliographic latitude, ecliptical longitude from the mean equinox, ecliptical longitude from the Earth-Sun line, ecliptical latitude, Helios - Earth distance,
and number of rotations of the Sun referred to Helios since launch.

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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/Helios2/Ephemeris/PT24H
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Helios 2 Daily Trajectory Data
ReleaseDate
2025-12-04 13:29:21Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-03-11 18:39:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:29:21Z
Note
Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. ZCB
Description

This data set contains orbital parameters for Helios 2: Helios-Sun distance, heliographic longitude from the ascending node, heliographic latitude, ecliptical longitude from the mean equinox, ecliptical longitude from the Earth-Sun line, ecliptical latitude, Helios - Earth distance,
and number of rotations of the Sun referred to Helios since launch.

Acknowledgement
Please acknowledge the National Space Science Data Center(NSSDC).
Contacts
RolePersonStartDateStopDateNote
1.MetadataContactspase://SMWG/Person/Jan.Merka
InformationURL
Name
Readme file at SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/helios/helios2/traj/day/helorb.txt
PriorIDs
spase://VSPO/NumericalData/P_HELIOS2_HDR_EPHEMERIS_24H
spase://VSPO/NumericalData/Helios2/Ephemeris/PT24H
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
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
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/helios/helios2/traj/day/
Description

Via ftp in ASCII from SPDF

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/helios/helios2/traj/day/
Description

In CDF via HTTP from SPDF

Format
Text
Encoding
ASCII
InstrumentIDs
spase://SMWG/Instrument/Helios2/Ephemeris
MeasurementType
Ephemeris
TemporalDescription
TimeSpan
StartDate
1976-01-15 00:00:00.000Z
StopDate
1980-03-04 00:00:00.000Z
Cadence
PT24H
ObservedRegion
Heliosphere.Inner