When maneuvering a vehicle, due to the seated position of the driver, the problem arises that a large portion of the space to the rear of the vehicle to be observed is hidden by the vehicle body itself. When two transition metal salts are used together to decompose dipersulfate, it provides synergistic oxidation activity, better than obtained by dipersulfate or dipersulfate with either copper or zinc alone. The folding transportable structure provides a strong, safe, insulated weatherproof structure with a quick setup time, and requires NO tools or separate loose components for assembly. , vrefM} and channel knowledge H1, H2 from first and second transmitters to compute equivalent channel matrix information Hieq based on the assigned or determined rank of the receiver. In effect, this invention will allow one application running on a workstation or personal computer to monitor networks that range in size from one to several thousand segments while consuming a bounded portion of its host systems resources.