GPS Standard Ponsition Service Signal Specification 2nd Edition

Solution:

• GPS Standard Ponsition Service Signal Specification 2nd Edition

  The GPS Standard Positioning Service
  
  The Global Positioning System (GPS) is a space-based radionavigation system which is managed for the Government of the United States by the U.S. Air Force (USAF), the system operator. GPS was originally developed as a military force enhancement system and will continue to play this role. However, GPS has also demonstrated a significant potential to benefit the civil community in an increasingly large variety of applications. In an effort to make this beneficial service available to the greatest number of users while ensuring that the national security interests of the United States are observed, two GPS services are provided. The Precise Positioning Service (PPS) is available primarily to the military of the United States and its allies for users properly equipped with PPS receivers. The Standard Positioning Service (SPS) is designed to provide a less accurate positioning capability than PPS for civil and all other users throughout the world.
  
  Purpose
  
  The GPS SPS Signal Specification defines the service to be provided by GPS to the civil community. This document is written to satisfy the following four objectives:
  1) Specify GPS SPS ranging signal characteristics.
  2) Specify SPS performance, given a receiver designed in accordance with this Signal Specification.
  3) Standardize SPS performance parameter definitions and measurement methodologies.
  4) Define SPS performance characteristics.