Reconfigurable geolocation system

A method for locating a human in an area, the method comprising:

• providing the human with a portable user node, the user node including a transmitter that generates a signal on one or more carrier frequencies, a receiver, and a processor;
• distributing a plurality of portable pseudolite nodes within the area, each of the pseudolite nodes including a transmitter that generates a signal on one or more carrier frequencies, a receiver, and a processor;
• modulating signals generated by user node and the pseudolite nodes with digital signals to establish communication among the user node and the pseudolite nodes and to convey data among the user node and pseudolite nodes;
• determining a relative position of the user node and the pseudolite nodes using the modulated signals;
• and
• determining a three-dimensional position of the human using the relative position of the user node and the pseudolite nodes.