2.5.0
spase://IUGONET/NumericalData/ISEE/Induction/LCL/induction/64hz_ergsc_cdf
64Hz induction magnetometer data for Lucky Lake in CDF
2022-01-12T01:00:00
2199-12-31T11:00:00
The induction magnetometer data observed at Lucky Lake, Canada. The data consist of variations of three-dimensional (H, D, and Z components) geomagnetic field taken with a sampling rate of 64 Hz, and some engineering parameters for the instrument, such as the sensitivity and phase difference. The digital data are distributed in the Common Data Format (CDF) through the ERG-SC repository. Importnat Notes: 1. For frequencies below ~1Hz, use the following equation to obtain amplitude values in units of nT/s: dB/dt (nT/s) = data (V) / quick_sensitivity. The value of quick_sensitivity is given in global attributes. For frequencies above ~1Hz, use the exact sensitivity curve to obtain absolute amplitude of waves. 2. Please note that the positive direction (polarity) of H, D, and Z are different depending on the station. For example, in February 2011, the polarity is KAP: positive=northward, eastward, upward; MGD: positive=northward, eastward, downward; ATH: positive=northward, eastward, downward; MSR: positive=southward, westward, upward; STA: positive=northward, eastward, downward. Please see http://stdb2.isee.nagoya-u.ac.jp/magne/magne_stations.html for the latest information.
1. Please contact Kazuo Shiokawa (shiokawa at isee.nagoya-u.ac.jp) before using the data for any publications and/or presentations. 2. References: Shiokawa, K., R. Nomura, K. Sakaguchi, Y. Otsuka, Y. Hamaguchi, M. Satoh, Y. Katoh, Y. Yamamoto, B. M. Shevtsov, S. Smirnov, I. Poddelsky, and M. Connors, The ISEE induction magnetometer network for observation of high-frequency geomagnetic pulsations, Earth Planets Space, 62(6), 517-524, doi:10.5047/eps.2010.05.003, 2010.
spase://IUGONET/Person/Kazuo.Shiokawa
PrincipalInvestigator
spase://IUGONET/Person/Martin.Connors
CoInvestigator
spase://IUGONET/Person/ISEE.Metadata.Management.Group
MetadataContact
spase://IUGONET/Repository/ISEE/ERG-SC
Online
Open
https://ergsc.isee.nagoya-u.ac.jp/index.shtml.en
CDF
1. Please contact Kazuo Shiokawa (shiokawa at isee.nagoya-u.ac.jp) before using the data for any publications and/or presentations. 2. References: Shiokawa, K., R. Nomura, K. Sakaguchi, Y. Otsuka, Y. Hamaguchi, M. Satoh, Y. Katoh, Y. Yamamoto, B. M. Shevtsov, S. Smirnov, I. Poddelsky, and M. Connors, The ISEE induction magnetometer network for observation of high-frequency geomagnetic pulsations, Earth Planets Space, 62(6), 517-524, doi:10.5047/eps.2010.05.003, 2010.
Uncalibrated
spase://IUGONET/Instrument/ISEE/Induction/LCL/induction
Magnetogram
2020-07-31T00:00:00
-P1D
PT0.015625S
Earth.NearSurface.Ionosphere.ERegion
Earth.Magnetosphere
Spherical
WGS84
51.0
51.0
277.81
277.81
EARTH SCIENCE Atmosphere Sun-earth Interactions Ionosphere/Magnetosphere Dynamics Magnetic Fields/Magnetic Currents
Epoch for the dB/dt data
epoch_db_dt
time label in CDF_EPOCH16 (the number of milliseconds since 01-Jan-0000) for the dB/dt data. All time values are in the universal time.
Temporal
Observation date and time for the dB/dt data
time_db_dt
Observation date and time for the dB/dt data. The time label for each time frame consists of an 8 element integer array for Year, month, day, hour, minute, second, milisecond, and microsecond. All time values are in the universal time
Temporal
dB/dt values for 3-component vector magnetogram
db_dt
Time derivative of 3-component (dH/dt, dD/dt, and dZ/dt) vector geomagnetic field observed with a sampling rate of 64 Hz. The unit is voltage [V], that is, the raw output from the instrument.
Magnetic
Pulse signal from the GPS clock associated with the magnetometer
time_pulse
Voltage variation of the electric signal generated by the GPS clock exactly every 1 second. The resultant voltage varies in a rectangular wave manner with each rise timing corresponding to the start of each second given by GPS. (CAUTION) The induction magnetometer at KAP is controlled by the PC clock. Therefore this data variable does not contain any meaningful value for LCL.
Other
Frequency values for the sensitivity-phase difference table
frequency
Frequency values in Hz for the sensitivity-phase difference table for this induction magnetometer.
Other
Sensitivity coefficients for the sensitivity-phase difference table
sensitivity
Conversion coefficients in V/nT taking into account the frequency-dependent sensitivity for this induction magnetometer.
Other
Phase difference values for the sensitivity-phase difference table
phase_difference
Phase difference in degree for each frequency used for the phase calibration
Other