Cooperative receiver system with mobile to mobile assistance

A method for synchronization of local clocks for receivers in a cooperative receiver system, comprising:

• determining a location and an orientation of a plurality of receivers of a cooperative receiver system, wherein no one receiver of the plurality of receivers individually receives a sufficient number of positioning system signals to locate the one receiver, and wherein the determining is based on an aggregation of each of the positioning system signals received by the plurality of receivers;
• location a first device in a monitored environment relative to the plurality of receivers based on communication between the first device and each of the plurality of receivers after the determining of the location and the orientation of the plurality of receivers;
• first communicating a first synchronization signal using radiofrequency communication between a first receiver of the plurality of receivers of the cooperative receiver system and the first device;
• generating a second synchronization signal at the first device;
• second communicating the second synchronization signal using radiofrequency communication between the first device and a second receiver;
• and
• synchronizing a second local clock of the second receiver to a first local clock of the first receiver based on the second synchronization signal.