Granted, this is for UAT. The system would be a cracker for airshow tower ops outside radar coverage.
Portable ADS-B Airspace Management System Announced
ADS-B Technologies has successfully tested its new ADS-B Mobile Control Unit (AMCU) under actual field conditions in Alaska. The rugged air-transportable unit is designed for remote and tactical applications where temporary airspace management, dispatch, or flight following may be required.
"AMCU is capable of monitoring and coordinating the operations of any number of 978 MHz UAT equipped aircraft from unimproved field sites," said Dave Palmer, ADS-B Tech's ATC Technical Director. "This system is going to be ideal for controlling the air picture over forest fires, disaster sites and in tactical applications where a highly accurate and reliable real-time surveillance system needs to be deployed fast."
The basic AMCU package weighs 62kg and can be expanded to include a wide range of power, communications and display options. Set-up time is usually less than 30 minutes.
from ADS-B.COM