Methods and apparatus for a multi-waveform wireless sensor network based
on widely distributed sensor nodes operating in wireless local area
networks and gateway connection to an operations center via wide area
network protocol. The scaleable network consists of a tiered structure of
sensor nodes within wireless local area networks using an ad hoc protocol
to form the network and at least one gateway node within each LAN to
provide a link to an operations center. The sensor network can be used to
detect and track Chemical, Biological, Radiological, Nuclear, and
high-yield Explosive events.