The Range Only Radar (ROR) is a compact, lightweight, low cost RF ranging sensor for optical tracking platforms. This radar blends proven tracking techniques with the reliability, flexibility, and cost effectiveness of off-the-shelf components and PC based hardware and software. The Range Only Radar design minimizes requirements for real-time operator interface. The open architecture of the radar hardware and software enables various options and customized features to be in incorporated without lengthy and costly re-engineering.