I have seen that RFID devices are functional, from the human body tracking to tracking beer kegs in transit. I am wishing to preferably build or minimally purchase a broadband detector that can be used for detecting a wide range of the devices. Are there plans for such an instrument published?
Also the GS positioning devices are at remarkably small, is there an earth bound public domain detector for those on the Market? There range covers the military to several commercial applications.