The Field Mobile Measurement System (FMMS) is a computer controlled special purpose measurement system that supports EW vulnerability analyses by independently measuring, recording, and certifying EW environments. It can sequentially track up to 12 targets and measure frequency, amplitude, pulse widths, and modulation parameters of various jamming waveforms. The system is housed in a climate-controlled van mounted on a 5-ton truck chassis to provide the capability to relocate to remote sites. The system also features automatic pre and post-mission calibration to ensure the validity of recorded data. On-going upgrades will allow remote site operations, target tracking, and auto emplacement through the use of GPS positioning systems.