Abstract: A satellite location determination system for a constellation of satellites includes a plurality of optical transceivers. Each optical transceiver is associated with a respective satellite and includes an optical synthesizer, transmission conditioning optics, a telescope assembly, reception conditioning optics, and an optical to electronic signal converter. The optical synthesizer produces phase-coherent optical laser pulses. The transmission conditioning optics appropriately conditions the characteristics of the phase-coherent optical laser pulses. The telescope assembly receives an output of the transmission conditioning optics and transmits an optical transceiver output into space for reception by an optical transceiver associated with another of the satellites. The telescope assembly also receives an optical transceiver output from another of the satellites. Reception conditioning optics appropriately conditions the characteristics of the optical transceiver output received from another of the satellites.