A system to capture data regarding conditions in a sealed metal shipping container
having: a sensor unit mountable inside the container and adapted to sense a condition
inside of the container; an impulse radio transmitter receiving data from the sensor
regarding the condition and transmitting an impulse radio wireless signal inside
of the container; an impulse radio receiver external to the container and proximate
the container, wherein the receiver is adapted to receive the impulse radio wireless
signal propagating through the sealed metal shipping container, and a data device
in communication with the receiver to capture the data from the sensor unit regarding
the condition inside of the container.
