CDF data of magnetic field measured at 20Hz intervals with the induction magnetometer at Syowa Station, Antarctica.

2013-07-09 12:00:00

Magnetic field measured with the induction magnetometer at Syowa Station, Antarctica. The data consist of variations of three-dimensional (H, D, and Z components) geomagnetic field taken with a sampling rate of 20 Hz, and some engineering parameters for the instrument, such as the sensitivity and phase difference. (As of July 2013, the engineering parameters are invalid.) The digital data are distributed in the Common Data Format (CDF).

Please contact the Principal Investigator, Dr. Hisao Yamagishi (yamagisi [at] nipr.ac.jp), National Institute of Polar Research (NIPR) before using the data at any publications and/or presentations. We welcome collaborative research and strongly recommend users to contact us early in order to ensure that the data are suitable for their research. When the data are used at any publications and/or presentations, we would like to ask the users to acknowledge NIPR and send us one copy of the reprints. An example of the acknowledgement statement is as follows: 'Magnetic field data were provided by National Institute of Polar Research, Japan. The Upper Atmosphere Physics Monitoring Observation at Syowa Station was mainly supported by the Research Program of Japanese Antarctic Research Expedition (JARE) of the Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT).' For more details about the observations, please refer the following data report: JARE data reports. Upper atmosphere physics 26, 1-59, 2008-02.

Online

Open

CDF

PT0.05S

-69.00

-69.00

39.58

39.58

Epoch for the dB/dt data

epoch_db_dt

time label in CDF_EPOCH (the number of milliseconds since 01-Jan-0000) for the dB/dt data. All time values are in the universal time.

millisecond

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 integer array of 7 elements for Year, month, day, hour, minute, second, milisecond. All time values are in the universal time.

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 20 Hz. The unit is voltage [V], that is, the raw output from the instrument.

Pulse signal from the GPS clock associated with the magnetometer

gps_1pps_time_pulse

This parameter is invalid for this data.

Frequency values for the sensitivity-phase difference table

frequency

Frequency values in Hz for the sensitivity-phase difference table for this induction magnetometer. As of July 2013, this parameter is invalid.

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. As of July 2013, this parameter is invalid.

Phase difference values for the sensitivity-phase difference table

phase_difference

Phase difference in degree for each frequency used for the phase calibration. As of July 2013, this parameter is invalid.