System and method of calibrating a radar rotatable antenna system

A system for calibrating a radar system comprising a radar antenna mounted on a rotatable support at a predetermined position relative to a reference point on said rotatable support, the system comprising:

• orientation measurement system configured to measure at least one orientation angle of said rotatable support and generate orientation data indicative of at least one angular position of said rotatable support;
• a surveying device configured to measure position of a target element, and a position of said reference point on said rotatable support, and generate reference data indicative thereof;
• and
• a control unit comprising one or more processors and memories configured and operable to receive antenna measurement data indicative of electromagnetic echo signals received by said radar antenna from said reference target element, determine a measured position of said target element relative to said antenna based on at least a portion of said antenna measurement data, determine a reference position of said target element relative to said radar antenna based on said reference data and on at least a portion of said orientation data, and determine at least one bias value or bias function associated with at least one of said orientation data or said antenna measurement data, based on a deviation between the determined measured position and reference position of said target element.