Format of Geotail Magnetic Field, Electric Field, and Ion Moment Data
Announcement of an ASCII format change
The year description in all data in the ASCII format has been changed since Sep. 1, 2013. Now,
4 digit numbers are used to express "years." (e.g. 92 -> 1992)
We are very sorry for your inconvinience.
MGF | EFD | LEP
| Column No. | Name | Unit | Format |
|---|
| 1-3 | Date | yr mon dy | i4,1x,2(i2.2,1x) |
| 4-6 | Time | hr mn sc | 2(i2.2,1x),f7.3 |
| 7 | Bx | nT | f8.2 |
| 8 | By | nT | f8.2 |
| 9 | Bz | nT | f8.2 |
| 10 | |B| | nT | f7.2 |
| 11 | φ | deg | f8.2 |
| 12 | θ | deg | f7.2 |
| 13 | RMS | nT | f7.3 |
| 14 | Range | 1-7 | i2 |
| 15 | X | Re (1 Re = 6371.2 km) | f8.2 |
| 16 | Y | Re (1 Re = 6371.2 km) | f8.2 |
| 17 | Z | Re (1 Re = 6371.2 km) | f8.2 |
- The first line has the following headers:
- before November 23, 2006 ---> MGF-FXFO-[QL or SDB-0 or SDB-1 or SDB-2]-[JPX or DSN]]-[SC or GSE or GSM or SM]-[0-OFS or BzOFS]
- on or after November 23, 2006 ---> MGF-FXFI-[QL or SDB-0 or SDB-1 or SDB-2]-[JPX or DSN]]-[SC or GSE or GSM or SM]-[0-OFS or BzOFS]
| Column No. | Name | Unit | Format |
|---|
| 1-3 | Date | yr mon dy | i4,1x,2(i2.2,1x) |
| 4-6 | Time | hr mn sc | 2(i2.2,1x),f7.3 |
| 7 | Bx (SC) | nT | f8.2 |
| 8 | By (SC) | nT | f8.2 |
| 9 | Bz (SC) | nT | f8.2 |
| 10 | RMS | nT | f7.3 |
| 11 | Ex (SC) | mV/m | f8.2 |
| 12 | Ey (SC) | mV/m | f8.2 |
| 13 | Rem | mV/m | f7.3 |
| 14 | S/C Potential | V | f8.2 |
| 15 | Ion Emitter | On or Off | a4 |
| 16 | X (GSE) | Re (1 Re = 6371.2 km) | f8.2 |
| 17 | Y (GSE) | Re (1 Re = 6371.2 km) | f8.2 |
| 18 | Z (GSE) | Re (1 Re = 6371.2 km) | f8.2 |
- The magnetic and electric fields are given in spacecraft coordinates, which are nearly equivalent to GSE coordinates: X is sunward, Y duskward, and Z northward.
- Rem is the deviation of the electric field from sine wave.
| Column No. | Name | Unit | Format |
|---|
| 1-3 | Date | yr mon dy | i4,1x,2(i2.2,1x) |
| 4-6 | Time | hr mn sc | 2(i2.2,1x),f7.3 |
| 7 | N | cm-3 | f7.3 |
| 8 | Vx | km/s | f6.0 |
| 9 | Vy | km/s | f6.0 |
| 10 | Vz | km/s | f6.0 |
| 11 | |V| | km/s | f6.0 |
| 12 | φ | deg | f8.2 |
| 13 | θ | deg | f7.2 |
| 14 | Ti,yy | eV | f6.0 |
| 15 | Ti,zz | eV | f6.0 |
| 16 | Sensor | EA or SW | a3 |
| 17 | X | Re (1 Re = 6371.2 km) | f8.2 |
| 18 | Y | Re (1 Re = 6371.2 km) | f8.2 |
| 19 | Z | Re (1 Re = 6371.2 km) | f8.2 |
- Ti,yy and Ti,zz are the YY and ZZ components of the ion temperature tensor, respectively, in spacecraft coordinates, which are nearly equivalent to GSE coordinates.
- The first line has the following headers: LEP-MOM-JPX-QL-[SC or GSE or GSM orSM]