A system and method for determining the roll rate and roll angle of a spinning platform in a jamming environment, by suppressing the interference signals from the received GPS signals and using the measured phase and amplitude differences between the GPS satellite signals received on two or more antennas. The systems may include primary and auxiliary rocker arms disposed adjacent to each other on a rocker arm shaft. In one system, the mixture passes through a hot nozzle and is injected into an upstream portion of the exhaust gas pipe. The SLEE can include an event routing bus for routing events between service components in the service logic layer and client components in the protocol layer and application layer.