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Coordinate Transformation Services

Coordinate Transformation Services below are available for instant execution, with results immediately viewable through the online interface.

Name
Author(s)
Institution
Description
AACGM
(Altitude Adjusted Corrected Geomagnetic Coordinates)
Kyle Baker and Simon WingNational Science FoundationAACGM system assumes that magnetic data are best organized along the magnetic field lines. AACGM gives the same magnetic coordinates to any position which lies on the same geomagnetic field line.

It is therefore conceptually closely related to Invariant magnetic coordinates. Thus, a point in space is defined by the geomagnetic field line it is on (given by the latitude and longitude), and its altitude.

To determine the AACGM coordinates of any point, start at that point and use the IGRF magnetic field model to trace the field line to the geomagnetic equator. Then, use the pure magnetic dipole model to trace the magnetic field line back to the surface of the earth. At that point, measure the angle between the line joining the point on the earth with the center of the earth, and the axis which defines the magnetic dipole. This angle gives you the co-latitude of the point in the magnetic coordinates. Any two points connected by a magnetic field line will have the same magnetic latitude and longitude in the AACGM coordinate system

Apex modelA.D. RichmondUCARApex model traces IGRF field lines to the apex of the field-line.

The altitude of the apex determines the Magnetic Apex latitude and the Quasi-dipole latitude. The geomagnetic-dipole longitude of the apex determines the Magnetic Apex and Quasi-dipole longitude.

National Aeronautics and Space Administration Air Force Materiel Command Air Force Office of Scientific Research Air Force Research Laboratory Air Force Weather Agency NOAA Space Environment Center National Science Foundation Office of Naval Research

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