/*
 * STRUCT: SRM_GM_3D_PARAMETERS
 *
 *   The parameters needed to define the Geomagnetic (GM) 3D Spatial
 *   Reference Frame (SRF). See the Spatial Reference Model for details.
 */
typedef struct
{
/*
* Spatial Reference Frame Orientation
*/
SE_UINT16 gm_epoch; (notes)
/*
* Specification of Object Reference Model (ORM)
*/
SE_FLOAT64 gm_earth_radius; (notes)
} SRM_GM_3D_PARAMETERS;

Field Notes

gm_epoch

 epoch definition in year Common Era

gm_earth_radius

 radius of the reference object; non-negative; in meters
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