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GPS Performance Standards Overview 2007 Update

Detailed overview of Global Positioning System (GPS) Performance Standards (PS) published in 2007, covering Precise Positioning Service (PPS) and Standard Positioning Service (SPS) for military and non-military users.

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GPS Performance Standards Overview 2007 Update

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  1. Global Positioning System (GPS) Performance Standards (PS) Brig Gen Donald Alston Director of Space and Nuclear Operations DCS, Air, Space & Information Operations, Plans & Requirements 4 October 2007

  2. Purpose of a PS • Precise Positioning Service (PPS) PS -- published Feb 2007: • Defines current service provided to military/authorized users • DoD commitments for the PPS SIS • What PPS users can count on the PPS SIS to provide • Basis for military GPS safety certifications • Example: Certifying PPS for use in safety of life applications • Standard Positioning Service (SPS) PS -- published Oct 2001: • Defines service provided to non-military GPS users • Defines current DoD commitments for the SPS SIS • What SPS users can count on the SPS SIS to provide • SPS PS is basis for all civil GPS safety certifications • Example: SPS use in IFR navigation by civil aviation

  3. SPS PS Update Process PPS PS Published NPEC Tracks Task AF/A3S Tasking Feb 07 Draft SPS PS from AFSPC Mar 07 Apr 07 Air Staff Review Jul 07 NII Review Now SPS PS Published Early 08 30 Apr ‘08

  4. Line of Demarcation SPACE SEGMENT SPS SIS INTERFACE CONTROL SEGMENT USER SEGMENT

  5. Summary • Final Document expected in May 2008 • SPS PS will be a significant step forward • Evolution of GPS performance • At the SIS interface that users plug into • Independent of receiver assumptions When published, get it from the Web: http://pnt.gov/ 2008

  6. Questions?

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