Globally referenced positioning in a shielded environment

An apparatus for determining position that is resistant to interference and capable of use within a shielded environment comprising:

• a UWB receiver;
• a GPS receiver;
• a bent-path GPS receiver;
• a GPS re-radiation antennae position outside the shielded environment, said antennae configured to remove biases introduced by different ionospheric conditions, magnetic fields when using a single satellite signal;
• an intelligent control operatively connected to the UWB receiver, the GPS receiver, and the bent-path GPS receiver;
• the bent-path receiver adapted to receive a heterodyned GPS signal comprising a GPS radio frequency wave and a wave of a different frequency, and to deheterodyne the heterodyned GPS signal to extract the GPS radio frequency wave;
• the intelligent control adapted to determine a globally referenced position at least partially based on integrating and correlating ultra wideband data received from:
• the UWB receiver, GPS data received from the GPS receiver, and/or GPS data received from the bent-path GPS receiver;
• wherein the GPS re-radiation antennae is capable of transmitting GPS signals onto multiple wireless radio frequency carriers simultaneously, or in a center channel frequency hopping mode in order to reduce the possibility of having the GPS heterodyned signals jammed or spoofed.