A geodetic longitude (-180..180).

Input Format:

A sexagesimal number between -180 and 180 degrees, inclusive. Positive longitudes refer to places to the east of Greenwich.

Operators:

-a

The unary minus operator changes the sign of its operand.

Use with do-loops:

When a Longitude variable is used as the dependent variable of a do-loop, the associated loop increment is specified as a Sexagesimal constant.

Context:

The site command takes a longitude argument that tells the control system the geodetic longitude of the local zenith.