The Stalker Pro is a $1,800+ radar gun that can measure the speed of objects with true accuray to 1/10th MPH, across a wide speed range, even when the objects are very far away. Typical tracking distances are as follows; semi truck-10,000 ft; automobile-6,000 ft; motorcycle-4,000 ft; boat-3,500 ft; personal watercraft-2,500 ft; model plane-1,000 ft; baseball-300 ft. Its speed rang is 1 to 300 MPH. Target acquisition time: 0.01 seconds in whole digits & 0.04 seconds in tenths. Update rate: 100 per second in whole digits & 30 per second in tenth digits. The gun has two seperate speed displays running simultaneousy, both the continously tracked speeds & the peak speeds can be shown together.
The gun should never be moved when tracking an object & it should only be used with objects comming to or going away from the gun. Readings taken without this method will always have a tangent error & moving the gun invalidates any readings. Water spray from a propeller has no effect on the guns readings no matter the direction.
The weekend of 8/20/11, I tested my Stalker Pro against a data logger system mounted in a pylon racing plane at the Julian, NC pylon race course. The maximum speed readings were consistently within 1/10 MPH between the data logger & the radar gun. Speeds measured were between 165 to 195 MPH.
Jim Allen
note: The Stalker Pro uses a polarized twin horn Ka band system. This configuration uses seperat horns for the transmit & receive functions. There will be nothing received unless the transmitted energy strikes a solid object. This system outperforms other radars by a large margin.
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