| Term: | LGM |
| Definition: |
Local Geomagnetic - A coordinate system usedmainly for Earth surface or near Earth surface magnetic field data. X axisnorthward from observation point in a geographic meridian. Z axis downwardtowards Earth's center. In this system, H (total horizontal component) =SQRT (Bx^2 + By^2) and D (declination angle) = arctan (By/Bx) |