Resource Name: Tokyo geomagnetic field 1-hour digital data in IAGA-2002 format (revised)
Release Date: 2007-12-27T00:00:00
Description: The geomagnetic field 1-hour digital data observed at Tokyo (TOK) in IAGA-2002 format. Data file comprises: Twelve mandatory file header records, Unlimited optional comment records, One mandatory data header record, A series of data records. Every record is 70 characters long plus the machine-dependent carriage return / line feed. Details of the format is described at http://www.ngdc.noaa.gov/IAGA/vdat/iagaformat.html.
Citation: Kakioka Magnetic Observatory, 2007, Tokyo geomagnetic field 1-hour digital data in IAGA-2002 format (revised) [dataset], Kakioka Magnetic Observatory Digital Data Service, doi:10.48682/186e9.2b007
- Contact
- Contact person:
Technical Division of the Kakioka Magnetic Observatory
- Organization Name: Japan Meteorological Agency
- E mail: kakioka@met.kishou.go.jp
- Role: General Contact
- Organization Name: Japan Meteorological Agency
- Access Information
-
Access URL:
https://www.kakioka-jma.go.jp/en/index.html
- Availability: Online
- Accessrights: Open
- Format: IAGA-2002 text format
- Acknowledgement: If the data are used in publications and presentations, the Kakioka Magnetic Observatory of the Japan Meteorological Agency should be acknowledged properly.
- Availability: Online
- Instruments
-
Measurement Type:
Geomagnetic field
- Instrument Type: Magnetometer
- Description: Variometers: Torsion magnetometers (H,D and Z). Absolute Instruments: Tanakadate's magnetic theodolite (D and H) and Cassela's dip-circle (I).
- Sensor Orientation: variation:XYZ, absolute:DIF
- Instrument Type: Magnetometer
- Temporal Description
-
- Time Span
-
Start Date:
1896-12-31T16:00:00
- Relative Stop Date: 1912-12-31T15:00:00
- Spatial Coverage
-
Observed Region:
Earth's surface
- Coordinate System Name: GEO(WGS84)
- Coordinate Representation: Spherical
- Northernmost Latitude: 35.683
- Southernmost Latitude: 35.683
- Easternmost Longitude: 139.75
- Westernmost Longitude: 139.75
- Unit: Degree
- Minimum Altitude: 0.021
- Maximum Altitude: 0.021
- Unit: km
- Reference Name: Central Meteorological Observatory, TOKIO
- Reference Code: TOK
- Coordinate System Name: GEO(WGS84)
- Parameter
-
Name:
Geomagnetic field
- Description: 1-hour value is read manually at the top of the hour on the analog magnetogram and calibrated using absolute values observed at a one-month interval. Details of tokyo data are given in "Toya,T., T.Koide and A.Yoshida, Correction of the Tokyo geomagnetic data in Meiji era, Technical Report of the Kakioka Magnetic Observatory, Supplement - Selected Translations, 3, 1-48, 2005."
- Field
-
Qualifier:
Vector
- Field Quantity: Magnetic
- Structure
-
Sampling:
1 hour
- Interval: 1-hour (revised)
- Data Type: definitive
- Elements: DHZ
- Units: D(eastward+)[arc minute], H[nT], Z(downward+)[nT]
- Resolution: 1nT ( 0.1 arc minute)
- Interval: 1-hour (revised)
- Remarks: X=H*cos(D*pi/180/60) [nT],Y=H*sin(D*pi/180/60) [nT], I=arctan(Z/H)*60*180/pi [arc minute]
- Description: 1-hour value is read manually at the top of the hour on the analog magnetogram and calibrated using absolute values observed at a one-month interval. Details of tokyo data are given in "Toya,T., T.Koide and A.Yoshida, Correction of the Tokyo geomagnetic data in Meiji era, Technical Report of the Kakioka Magnetic Observatory, Supplement - Selected Translations, 3, 1-48, 2005."