Version:2.2.9
NumericalData
ResourceID
spase://NASA/NumericalData/Helios2/E2/PT1H
ResourceHeader
ResourceName
Helios 2 E2 (Neubauer) 1-HR Magnetometer Data
ReleaseDate
2021-03-11 18:39:11Z
Description
The instrument (E2) consisted of a triaxial fluxgate magnetometer mounted on a 2.75-m boom to make magnetic field measurements up to 4 Hz. Data from each axis were first sent through a low-pass filter with the 3-dB attenuation point at 4 Hz. Depending on the telemetry format and bit rate, the data were fed either into a time-averaging computer or directly connected to telemetry. A shock identification computer triggered the storage of rapid-rate data in the spacecraft memory when there were discontinuities in the variations of the ambient magnetic field. Two measurement ranges were used, plus or minus 100 and 400 nT with resolutions of plus or minus 0.2 and 0.8 nT, respectively. The instrument was equipped with a flipper mechanism, which reoriented each sensor by 90 deg periodically. For detailed information, see p. 232 of Raumfahrtforschung, v. 19, n. 5, 1975.
Acknowledgement
Please acknowledge the PI and the National Space Science Data Center for these data
Contacts
InformationURL
Name
SPDF Helios E2 Home Page
URL
InformationURL
Name
Readme file at SPDF
URL
PriorIDs
spase://VHO/NumericalData/Helios2/E2/PT1H
spase://VSPO/NumericalData/Helios2/E2/PT1H
spase://VSPO/NumericalData/P_HELIOS2_HDR_E2_MAG_1HR
spase://VSPO/NumericalData/Helios2/E2/PT1H
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description
In ASCII via FTP from SPDF
AccessURL
Name
HTTPS from SPDF
URL
Description
In ASCII via HTTP from SPDF
Format
Text.ASCII
InstrumentIDs
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
1974-01-01 00:00:00Z
StopDate
1979-12-31 23:59:59Z
Cadence
PT1H
ObservedRegion
Heliosphere.NearEarth
ObservedRegion
Heliosphere.Inner
Caveats
THE SSE SYSTEM IS ANALOGOUS TO THE GEOCENTRIC SOLAR ECLIPTIC SYSTEM IN THAT THE X-AXIS POINTS FROM THE CENTRAL BODY (THE SPACECRAFT) TOWARDS THE SUN, THE Y-AXIS POINTS OPPOSITE TO ORBITAL MOTION IN THE ECLIPTIC, AND THE Z-AXIS POINTS NORTH FROM THE ECLIPTIC. THE HELIOS 1/2 SPACECRAFT HAD ORBITS IN THE ECLIPTIC WITH SPIN AXES PERPENDICULAR TO THE ECLIPTIC. SINCE THERE WERE TWO HELIOS SPACECRAFT, WE REFER TO THE SPACECRAFT-CENTERED (RATHER THAN HELIOS-CENTERED SOLAR ECLIPTIC ) SYSTEM TO ELIMINATE ANY POSSIBLE CONFUSION.
Parameter #1
Name
Year
ParameterKey
Column_1
Description
YEAR OF THE DATA INTERVAL (LAST TWO DIGITS ONLY)
Support
Parameter #2
Name
Day of Year
ParameterKey
Column_2
Description
DAY OF THE DATA INTERVAL FROM THE FIRST DAY OF THE ABOVE YEAR, JAN. 1= DAY 1
Support
Parameter #3
Name
Hour
ParameterKey
Column_3
Description
HOUR OF THE DAY OF THE DATA INTERVAL
Support
Parameter #4
Name
Bxse
ParameterKey
Column_4
Description
THE COMPONENT OF THE INTERPLANETARY MAGNETIC FIELD DIRECTED TOWARD THE SUN AND PARALLEL TO THE X-AXIS OF THE SPACECRAFT-CENTERED SOLAR ECLIPTIC (SSE) COORDINATE SYSTEM (FIELD IN NANOTELSAS).
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SSE
Field
Qualifier
Component.I
FieldQuantity
Magnetic
Parameter #5
Name
Byse
ParameterKey
Column_5
Description
THE COMPONENT OF THE INTERPLANETARY MAGNETIC FIELD IN THE ECLIPTIC ALONG THE SSE Y-AXIS
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SSE
Field
Qualifier
Component.J
FieldQuantity
Magnetic
Parameter #6
Name
Bzse
ParameterKey
Column_6
Description
THE COMPONENT OF THE INTERPLANETARY MAGNETIC FIELD DIRECTED PERPENDICULAR TO AND NORTHWARD FROM THE ECLIPTIC, PARALLEL TO THE SSE Z-AXIS
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SSE
Field
Qualifier
Component.K
FieldQuantity
Magnetic
Parameter #7
Name
Bmag
ParameterKey
Column_7
Description
AVERAGE OF FINE SCALE FIELD MAGNITUDES FOR THE INTERPLANETARY MAGNETIC FIELD VECTOR (NANOTESLAS)
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SSE
Field
Qualifier
Magnitude
FieldQuantity
Magnetic
Parameter #8
Name
Btheta
ParameterKey
Column_8
Description
ELEVATION ANGLE OF THE MAGNETIC FIELD VECTOR IN THE SSE SYSTEM (I.E., SSE LATITUDE ANGLE).
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SSE
Field
Qualifier
DirectionAngle.ElevationAngle
FieldQuantity
Magnetic
Parameter #9
Name
Bphi
ParameterKey
Column_9
Description
AZIMUTH ANGLE OF THE MAGNETIC FIELD VECTOR IN THE SSE SYSTEM (I.E., SSE LONGITUDE ANGLE)
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SSE
Field
Qualifier
DirectionAngle.AzimuthAngle
FieldQuantity
Magnetic
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