Control and features for satellite positioning system receivers

A satellite positioning receiver comprising:

• a first subsystem within the satellite positioning receiver that processes satellite positioning signals into processed satellite signals;
• a second subsystem that receives processed satellite positioning signals;
• and
• a memory subsystem that enables the processed satellite positioning signals to be passed from the first subsystem to the second subsystem, where the first subsystem uses a first circular link list of channels in the memory subsystem to process the satellite signals and the second subsystem uses a second circular link list of the same channels in the memory subsystem to process the processed satellite signals available to the second subsystem.