Data Access
The stack plot data about ISEE induction magnetometer observed at all stations (Athabasca Canada, Moshiri Hokkaido-Japan, Paratunka Russia, Sata Kagoshima-Japan, Zhigansk Russia, Kapuskasing Canada, Gakona Alaska, and so on). This plot data shows the H-component frequency data (in logarithmic scale) taken with a sampling rate of 64 Hz. Some engineering parameters for the instrument, such as the sensitivity and phase difference. This plot data and station list has been opened by ISEE Magentometer's web site (http://stdb2.stelab.nagoya-u.ac.jp/magne/). Important 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 ATH: positive=northward, eastward, upward; MGD: positive=northward, eastward, downward; PTK: 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.
Version:2.5.0
The stack plot data about ISEE induction magnetometer observed at all stations (Athabasca Canada, Moshiri Hokkaido-Japan, Paratunka Russia, Sata Kagoshima-Japan, Zhigansk Russia, Kapuskasing Canada, Gakona Alaska, and so on). This plot data shows the H-component frequency data (in logarithmic scale) taken with a sampling rate of 64 Hz. Some engineering parameters for the instrument, such as the sensitivity and phase difference. This plot data and station list has been opened by ISEE Magentometer's web site (http://stdb2.stelab.nagoya-u.ac.jp/magne/). Important 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 ATH: positive=northward, eastward, upward; MGD: positive=northward, eastward, downward; PTK: 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.
| Role | Person | StartDate | StopDate | Note | |
|---|---|---|---|---|---|
| 1. | PrincipalInvestigator | spase://IUGONET/Person/Kazuo.Shiokawa | |||
| 2. | MetadataContact | spase://IUGONET/Person/ISEE.Metadata.Management.Group |
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.
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
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.
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 ATH is controlled by the PC clock. Therefore this data variable does not contain any meaningful value for ATH.
Frequency values in Hz for the sensitivity-phase difference table for this induction magnetometer.
Conversion coefficients in V/nT taking into account the frequency-dependent sensitivity for this induction magnetometer.
Phase difference in degree for each frequency used for the phase calibration