What is the role of an anemometer in telemetry, and what signal conditioning might be required?

• A. Measures wind direction; conditioning includes magnetization.
• B. Measures humidity; conditioning includes drying.
• C. Measures pressure; conditioning includes calibration.
• D. Measures wind speed; conditioning includes smoothing, temperature compensation, linearization, and scaling.

Answer: (D)

Wind speed is what an anemometer provides for telemetry, converting mechanical motion into an electrical signal. That output can be noisy, drift with temperature, and be nonlinear, so conditioning is essential to make the data usable. Smoothing helps reduce jitter and high-frequency noise without wiping out real wind changes. Temperature compensation corrects drift in sensor or electronics as ambient temperature varies, improving accuracy. Linearization adjusts the nonlinear sensor response so wind speed maps to a proportional, straight-line output, making interpretation straightforward. Scaling then tunes the signal to fit the telemetry system’s input range, ensuring the data uses the full resolution of the ADC or digital channel. Together, these steps produce a clean, accurate, and interpretable wind-speed record for transmission.