For X-Band at 1000 feet, how far is the measurement?

• A. 210 Feet
• B. 250 Feet
• C. 317 Feet
• D. 350 Feet

Answer: (C)

In speed measurement using radar technology, particularly with an X-Band radar system, the distance over which a target's speed is measured can be derived from the radar's properties, like the frequency and wavelength, and the size of the radar beam.

For X-Band frequencies, which typically operate around 10 GHz, the radar signal will beam at a specific angle and cover a certain distance. At 1000 feet, the radar equipment captures the target's speed by reflecting signals back from moving vehicles within its detection range.

The answer of 317 feet as the measurement distance at 1000 feet is derived from the specific characteristics of the radar signal, including the time it takes for the signal to travel to the vehicle and back. This measurement represents an effective range where the system reliably detects and calculates the speed of a target.

Understanding the physics behind radar technology is crucial in discussing measurement distances. The chosen answer reflects the operational efficiency and the mathematical calculations done to ensure accurate speed readings based on radar beam spread at given distances.