Version:2.4.0
NumericalData
ResourceID
spase://CNES/NumericalData/CDPP-Archive/GEOS-2/S-300/GEOS2_UBF_VTL2
ResourceHeader
ResourceName
GEOS-2 Ultra Low Frequency Magnetic Field Components Level-2 (CDF)
DOI
https://doi.org/10.24400/802406/2y6b-6f84
ReleaseDate
2022-07-26 09:56:13Z
Description
This dataset contains magnetic field components from GEOS-2 S-300 wave experiment (search coil magnetometer) given in SRV Coordinate System in nT. Time resolution is 43 ms.
Bx, By, Bz: Magnetic field
Dx, Dy: despin signals corresponding to the continuous magnetic field rotation
Acknowledgement
Users of these data are encouraged to acknowledge ESA/ESTEC (European Space Agency / European Space Research and Technology Center), DSRI (Danish Space Research Institute), CNES (Centre National d'Etudes Spatiales) for their support to the SCM GEOS team, NASA/GSFC (National Aeronautics and Space Administration / Goddard Space Flight Center) and CNR (Consiglio Nazionale delle Ricerche) for their support to the MAG GEOS team, and the CDPP (Centre des Données de la Physique des Plasmas) for the distribution of the GEOS data, in all publications.
If PI/coI are not part of the publication list, then we suggest to add Specifically, we acknowledge Roger Gendrin and Patrick Robert for use of SCM data from the GEOS mission.
Contacts
AccessInformation
RepositoryID
Availability
Online
AccessURL
Name
REGARDS
URL
Description
Access via CNES Data Archive for CDPP
Format
CDF
ProcessingLevel
Calibrated
ProviderProcessingLevel
2
InstrumentIDs
MeasurementType
Waves.Passive
MeasurementType
Waves.Active
TemporalDescription
TimeSpan
StartDate
1978-07-26 00:00:00Z
StopDate
1983-01-31 00:00:00Z
ObservedRegion
Earth.NearSurface.Plasmasphere
ObservedRegion
Earth.Magnetosphere
Parameter #1
Name
Sampling frequency
Description
Sampling frequency
Units
Hz
Support
Parameter #2
Name
Voltage range min
Description
Voltage range min
Units
V
Support
Parameter #3
Name
Voltage range max
Description
Voltage range max
Units
V
Support
Parameter #4
Name
Telemetry range min
Description
Telemetry range min
Support
Parameter #5
Name
Telemetry range max
Description
Telemetry range max
Support
Parameter #6
Name
Spin period
Description
Spin period
Units
Hz
Support
Parameter #7
Name
Filter frequency min
Description
Filter frequency min
Units
Hz
Support
Parameter #8
Name
Filter frequency max
Description
Filter frequency max
Units
Hz
Support
Parameter #9
Name
Cut off frequency
Description
Cut off frequency
Units
Hz
Support
Parameter #10
Name
Detrend frequency
Description
Detrend frequency
Units
Hz
Support
Parameter #11
Name
Calibration kernel size
Description
Calibration kernel size
Support
Parameter #12
Name
Calibration shift size
Description
Calibration shift size
Support
Parameter #13
Name
Warning code
Description
This warning indicates if there is any problem on the data : 0 no problem, 1: the Quality of all or some of the frames in the format is suspect 2: the telemetry format is missing and dumny data has been substituted
Support
Parameter #14
Name
Low speed format
Description
Low speed format
Corresponding duration 1.37601 s
Support
Parameter #15
Name
Spin rate
Description
Spin rate
Units
Hz
Support
Parameter #16
Name
Euler Angles
Description
Euler angles allow transition from rotating antennas frame into reference VDH frame. First component: precession, second: nutation, third: own rotation/gyration
Units
°
UnitsConversion
0.0174532925>rad
Support
SupportQuantity
Orientation
Parameter #17
Name
Direction of Rotation
Description
Direction of Rotation of the probe.
e : electron, p : proton
Support
Parameter #18
Name
Origin of the data
Description
This parameter indicates if the data are original or interpolated. 0 : interpolated, 1 : original
Support
Parameter #19
Name
Spin Phase Angle
Description
Spin Phase is given in the S/C system and S/C sens
Units
°
UnitsConversion
0.0174532925>rad
Support
SupportQuantity
SpinPhase
Parameter #20
Name
Magnetic field components in SRV coordinate system
Description
Magnetic field components in SRV coordinate system.
Bx, By, Bz: Magnetic field,
Dx, Dy: despin signals corresponding to the continuous magnetic field rotation.
VDH frame (Vertical Dusk Horizontal system)
The V-axis is the outwards local vertical, to the point of observation.The H-axis is parallel to the horizontal local plane, positive to the North.The V-H plane is a geographic meridian plane. The D-axis is azimuthal, eastwards.
SRV frame
Z aligned with the spin axis
X is in the geographic meridian plane (V,H) of the VDH frame
Caveats
Note that Dx and Dy are truncated from the raw signal before numerisation.
The conversion to Volt units is given by Bx(V) = -(Bx*5.1/255.0 - 2.5)/Gx and Dx(V) = (Dx*5.1/255.0 -2.5)/10.0
Units
nT
UnitsConversion
1e-9>T
Wave
WaveType
Electromagnetic
Qualifier
Vector
WaveQuantity
MagneticField
FrequencyRange
Low
0.01
High
11.5
Units
Hz
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