## Magnetic Field Model MF7

Satellites in low-Earth orbit (LEO) provide the most effective means of mapping the long wavelengths of the magnetic field caused by the magnetization of the Earth's crust. The MF7 model was produced using CHAMP measurements from May 2007 to April 2010. The modeling methodology remained largly unchanged from the previous version |

Fig.1: (click to enlarge) |

Available MF7 Downloads | ||||||
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| Type | Format | Mbyte | Ref. Radius | Contents | |

SH coefficients | ASCII Table |
0.3 | 6371.2 km | MF7 Model spherical harmonic coefficients (Schmid semi-normalized, as usual) |
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Graphic | PDF |
1.0 | WGS84 | Image of vertical component (Z) at WGS84 ellipsoid altitude. | ||

Listing | GZ |
42 | WGS84 | MF7_Z_0.xyz.gz6 arc minute ascii grid of vertical component (Z) at WGS84 ellipsoid altitude. |
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Graphic | PDF |
1.0 | WGS84 | Image of the anomaly of total intensity at WGS84 ellipsoid altitude. | ||

Listing | GZ |
42 | WGS84 | MF7_dF_0.xyz.gz6 arc minute ascii grid of the anomaly of total intensity at WGS84 ellipsoid altitude. |
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Listing | GZ |
660 | WGS84 | MF7_dF_2.5.xyz.gz1.5 arc minute ascii grid of the anomaly of total intensity at 2.5 km altitude above the WGS84 ellipsoid. This grid is intended for use in the World Digital Magnetic Anomaly Map project for the 2011 revision. Please be aware of the large file size (660 MB) of this grid. |
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Graphic | PDF |
1.0 | WGS84 | Image of the analytic signal at WGS84 ellipsoid altitude. | ||

Listing | GZ |
6 | 6771.2 km | MF7_0_as.xyz.gzAscii grid of the analytic signal at WGS84 ellipsoid altitude. |
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Listing | GZ |
6 | 6771.2 km | MF7_0_dFdx.xyz.gzAscii grid of the northward derivative of the total intensity anomaly at WGS84 ellipsoid altitude. |
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Listing | GZ |
6 | 6771.2 km | MF7_0_dF_dy.xyz.gzAscii grid of the eastward derivative of the total intensity anomaly at WGS84 ellipsoid altitude. |
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Listing | GZ |
6 | 6771.2 km | MF7_0_dFdz.xyz.gzAscii grid of the downward derivative of the total intensity anomaly at WGS84 ellipsoid altitude. |

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