gpssps标准GLOBAL POSITIONING SYSTEM STANDARD POSITIONING SERVICE SIGNAL SPECIFICATION 2nd Edition June 2, 1995 June 2, 1995 GPS SPS Signal Specification TABLE OF CONTENTS SECTION 1.0 The GPS Standard Positioning Service .....................................1 1.1 1.2 1.3 1.4 Purpose .............................................................................................................................. 1 Scope.................................................................................................................................. 1 Policy Definition of the Standard Positioning Service......................................................... 2 Key Terms and Definitions.................................................................................................. 3 1.4.1 General Te……