Longitude, in degrees, of the central meridian.

Longitude, in degrees, of the eastern meridian.

The western meridian is assumed to be west of the central meridian by the same amount that the eastern meridian is east of the central meridian.

Latitude, in degrees, of the northern standard parallel.

Latitude, in degrees, of the southern standard parallel.

The false easting to be applied to all X coordinates, usually selected to cause all X coordinates within the coordinate system to be positive values of reasonable size.