GEOS-1 Ultra Low Frequency Magnetic Field Components Level-2 (CDF)

https://doi.org/10.24400/802406/ntq0-ht5w

2022-07-26 09:56:13Z

This dataset contains magnetic field components from GEOS-1 S-300 wave experiment (search coil magnetometer) given in SRV coordinate system in nT. Time resolution is 43 ms.

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.

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CDF

Sampling frequency

Sampling frequency

Hz

Voltage range min

Voltage range min

V

Voltage range max

Voltage range max

V

Telemetry range min

Telemetry range min

Telemetry range max

Telemetry range max

Spin period

Spin period

Hz

Filter frequency min

Filter frequency min

Hz

Filter frequency max

Filter frequency max

Hz

Cut off frequency

Cut off frequency

Hz

Detrend frequency

Detrend frequency

Hz

Calibration kernel size

Calibration kernel size

Calibration shift size

Calibration shift size

Warning code

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

Low speed format

Low speed format
Corresponding duration 1.37601 s

Spin rate

Spin rate

Hz

Euler Angles

Euler angles allow transition from rotating antennas frame into reference VDH frame. First component: precession, second: nutation, third: own rotation/gyration

°

0.0174532925>rad

Direction of Rotation

Direction of Rotation of the probe.
e : electron, p : proton

Origin of the data

This parameter indicates if the data are original or interpolated. 0 : interpolated, 1 : original

Spin Phase Angle

Spin Phase is given in the S/C system and S/C sens

°

0.0174532925>rad

Magnetic field components in SRV coordinate system

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

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

nT