Storm Prediction Center Secretariat of the Pacific Community Shuttle Processing Contractor Satellite Processing Center Scientific Program Committee Sector Processing Center Shuttle Processing Contract Solid-Phase Crystallization Standard Propulsion Components Sample preparation cell Sandia Program Council Single point of contact small particle count Special protective coating Specialized Product Centre Specifications Spectroscopic and Polarimetric Coronagraph State Plane Coordinate Superconductivity Pilot Center switching power combiner Systems Planning Corporation