1. RADIONAVIGATION CAPABILITIES ASSESSMENT TASK FORCE CGSIC March 10, 2004   John Augustine U.S. Department of Transportation

2. CGSIC2 Overview Background Task Force Purpose Technical Approach Conclusions Recommendations Way Ahead

3. CGSIC3 Background The Vulnerability Assessment of the Transportation Infrastructure Relying on the Global Positioning System –Released September 10, 2001 –Identified vulnerabilities to aviation, maritime, and land applications and recommended an assessment On March 6, 2002, Secretary Mineta initiated an action plan –Directed the DOT Pos/Nav EC to establish a Task Force and conduct an assessment of radionavigation system capabilities for the transportation infrastructure

4. CGSIC4 Background – cont. Membership within the Task Force consisted of technical experts from: OST, FAA, FHWA, FRA, ITSJPO, NGS, NHTSA, USCG, and Volpe –SETA support from Overlook Systems Technologies –OST assigned as Task Force chair Extensive Working Group meetings held from from March 2002 – December 2003 First comprehensive cross-modal radionavigation system assessment for transportation infrastructure

5. CGSIC5 Task Force Purpose 1)Conduct a multi-modal capabilities assessment of all radionavigation systems to satisfy national PNT requirements. 2)Provide a recommendation on a capability investment strategy for the mix of Federal radionavigation systems To meet all requirements of the U.S. Transportation infrastructure Ten year forecast

6. CGSIC6 Technical Approach (Task 1) Conducted analyses of requirements versus system capabilities for transportation and non- transportation requirements –Requirements used were based on the 2001 FRS and 2000 GPS ORD. Several new requirements not yet captured in FRS or ORD were also considered. –System capabilities were based on the 2001 FRS, 2000 GPS ORD, and GPS SPS Performance Standard –Assessment yielded 19 detailed application analyses Focused on cross modal systems and did not address aviation-specific systems (i.e. VOR/DME, ILS, TACAN, and NDB)

7. CGSIC7 Technical Approach (Task 2) Radionavigation system mix recommendation (Task 2) evaluated: –Radionavigation system capabilities –Back-ups to GPS –System costs Task Force defined 11 basic system mix options including 2001 FRP baseline System mix options considered: –Terminating certain systems –Collocating certain systems where feasible and cost beneficial –Identifying system enhancements that would be necessary to meet certain cross-modal requirements

8. CGSIC8 Technical Approach (Task 2 cont.) With guidance from the Pos/Nav EC and completion of the capabilities assessment, the Task Force reduced the 11 system mix options to a final set of four system mix options: –Option 1: Baseline 2001 FRP –Option 2: Discontinue Loran-C –Option 3: Collocate Augmentations and Continue Loran-C –Option 4: Collocate Augmentations and Discontinue Loran-C Final four system mix options addressed current primary and backup requirements for aviation, marine, land, and non-transportation users

9. CGSIC9 Task Force Conclusions Additional studies needed before “final” system mix can be recommended Adequate back-ups exist today for current transportation and positioning requirements –However, evolutions in systems, applications, and requirements will necessitate continual cross-modal coordination and validation within each mode to assure adequate back-ups remain –Back ups for timing applications remain less clear –Back ups do not have to be other radionavigation systems

10. CGSIC10 Task Force Conclusions – cont. No one system meets all cross-modal requirements –Validates 1994 National Augmentation Study Further collocation of existing radionavigation systems is not cost effective at this time –Due to limited number of new WAAS sites that are available for collocation with NDGPS –Efforts should focus on future system expansions R&D systems were not considered in the final evaluation –Considered in future evaluations as these systems mature and become operational

11. CGSIC11 Task Force Recommendations DOT should review radionavigation system investment decisions and program strategies –Ensure PNT requirements are met in the most cost effective manner across the entire transportation infrastructure –Current IRB structure should be broadened to serve this oversight review function GPS modernization, including the implementation of the second and third civil frequencies, should proceed as expeditiously as feasible –Every effort should be made to meet, and accelerate if possible, the operational implementation schedule for these new GPS capabilities

12. CGSIC12 Task Force Recommendations – cont. Complete the enhanced Loran evaluation –If enhanced Loran meets the aviation and maritime requirements, and is cost effective across multiple modes, Loran should be retained –If enhanced Loran does not meet expected performance criteria, or is not cost effective across multiple modes, Loran should be terminated at the end of 2008 Complete three additional studies as follows: –USCG, in cooperation with the FAA, assess the ability of WAAS to meet maritime requirements –FHWA, in cooperation with FRA and USCG, assess the ability of HA-NDGPS to meet surface requirements –The FAA will assess the ability of LAAS to meet precision approach requirements for aviation

13. CGSIC13 Task Force Recommendations – cont. Collocation of WAAS, NDGPS, and Loran facilities should be explored in conjunction with any future expansions of those systems (contingent upon results of enhanced Loran study). Department should explore funding strategies to ensure NDGPS is implemented in accordance with the schedule in the 2001 FRP. As requirements and applications continue to evolve, the potential for various systems to contribute to the overall radionavigation mix should be periodically reevaluated.

14. CGSIC14 Way Ahead Complete enhanced Loran evaluation by March 31, 2004 –Enable Loran decision by end of 2004 Complete three additional system evaluations to assess the ability of: –WAAS to meet maritime requirements –HA-NDGPS to meet current and future land requirements –LAAS to meet precision approach requirements for aviation Reassess final four system mix options as additional data become available

15. CGSIC15 Document Access Electronic copies of the Radionavigation Capabilities Assessment Task Force report can be obtained from: –http://www.navcen.uscg.gov/http://www.navcen.uscg.gov/ –http://ostpxweb.dot.gov/http://ostpxweb.dot.gov/ Limited hard copies available

16. CGSIC16 Questions John E. Augustine Office of Navigation and Spectrum Policy Department of Transportation Tel: (202) 366-4355 Fax: (202) 366-3393 John.Augustine@ost.dot.gov