The restricted height of buildings surrounding a weather radar antenna shall be as follows：1.With the center of the pedestal bottom of a weather radar antenna as the measuring center, the highest part of abuilding within a radius of one hundred and eighty-six (186) meters, shall be under the horizon of the pedestal bottom.2.With the center of the pedestal bottom of a weather radar antenna as the measuring center, the highest part of abuilding within the circular belt of an inner radius of one hundred and eighty-six (186) meters and an outer radius of four hundred and ninety-eight (498) meters, shall be under an elevation angle of 0.5 degrees (see attached Sketch 2) .