GPS L 5 Dr Chris Hegarty L 2L

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GPS L 5 Dr. Chris Hegarty L 2/L 5 Industry Day May 2, 2001

GPS L 5 Dr. Chris Hegarty L 2/L 5 Industry Day May 2, 2001 1

Background • 1996 - GPS Presidential Decision Directive (PDD) – Comprehensive national policy on

Background • 1996 - GPS Presidential Decision Directive (PDD) – Comprehensive national policy on GPS and augmentations – Interagency GPS Executive Board (IGEB) established • February 1997 - Department of Defense (Do. D) and Department of Transportation (Do. T) agree to provide a second civil GPS frequency • March 1998 - VP Gore announces IGEB decision to implement two new civil signals • January 1999 - VP Gore announces third civil signal frequency selection - 1176. 45 MHz 2

Background (continued) • February 1999 - IGEB Third Civil Signal Implementation Steering Group formed

Background (continued) • February 1999 - IGEB Third Civil Signal Implementation Steering Group formed – Established relationship between IGEB and RTCA for development of L 5 signal requirements • November 1999 - IGEB report Implementation of a Third Civil GPS Signal completed – Recommended implementing L 5 with: • 6 d. B higher minimum received signal power than L 1 C/A code • 10. 23 Mchip/second spreading codes on quadrature channels (no data on one channel) – Other recommendations regarding coexistence of L 5 with existing systems operating at/near 1176. 45 MHz • Link 16 • Distance Measuring Equipment (DME)/Tactical Air Navigation (TACAN) 3

Feb. - Nov. ‘ 99 IGEB Organization Interagency GPS Executive Board (IGEB) Executive Secretariat

Feb. - Nov. ‘ 99 IGEB Organization Interagency GPS Executive Board (IGEB) Executive Secretariat Third GPS Signal Implementation Steering Group WG 1 Technical Feasibility of Coexistence WG 2 Cost Issues/ Operational Impacts WG 3 Signal Requirements RTCA, Inc (SC 159 WG 1) WG 4 International Coordination GPS WP 8 D GPS International Outreach Group 4

Current IGEB L 5 Activities • Working Group 1 -Validation of Coexistence – Addresses

Current IGEB L 5 Activities • Working Group 1 -Validation of Coexistence – Addresses follow-on work recommendations from Nov. 1999 IGEB report – Co-chaired by Dr. Hegarty (MITRE)/Mr. Williams (JSC) • Working Group 2 – L 5 Signal Specification – Chaired by Dr. Hegarty (MITRE) 5

Present IGEB Organization Interagency GPS Executive Board (IGEB) Senior Steering Executive Secretariat WG 1

Present IGEB Organization Interagency GPS Executive Board (IGEB) Senior Steering Executive Secretariat WG 1 Validation of Coexistence Group WG 2 Signal Specification RTCA, Inc (SC 159 WG 1) 6

L 5 Signal Specification Schedule • December 2000 – RTCA Program Management Committee (PMC)

L 5 Signal Specification Schedule • December 2000 – RTCA Program Management Committee (PMC) approved L 5 Signal Specification – Received formal civil coordination through the extended DOT Positioning/Navigation Executive Committee, with all agencies concurring • February 2001 - Do. D review completed and comments provided to DOT • April 2001 - DOT response to comments • October 2001 - Threshold date for 1 st release of Interface Control Document (ICD) GPS-705 7

GPS L 5 Spectral Environment Dr Chris HegartyGPS L 5 Spectral Environment Dr Chris Hegarty
GPS and Inspection Basics GPS Basics n GPSGPS and Inspection Basics GPS Basics n GPS
Vaisala GPS station Global Positioning System GPS GPSVaisala GPS station Global Positioning System GPS GPS
GPS GPS GPS l Carrier WaveL 1L 2GPS GPS GPS l Carrier WaveL 1L 2
GPS Global Positioning System GPS Nama asli GPSGPS Global Positioning System GPS Nama asli GPS
GPS and Inspection Basics GPS Basics n GPSGPS and Inspection Basics GPS Basics n GPS