Sustaining the global positioning system / Earl M. Peabody, editor.

Includes bibliographical references (pages [81]-82) and index.

Description based on print version record and CIP data provided by publisher.

SUSTAINING THE GLOBAL POSITIONING SYSTEM; SUSTAINING THE GLOBAL POSITIONING SYSTEM; LIBRARY OF CONGRESS CATALOGING-IN-PUBLICATION DATA; CONTENTS; PREFACE; Chapter 1: GLOBAL POSITIONING SYSTEM: SIGNIFICANT CHALLENGES IN SUSTAINING AND UPGRADING WIDELY USED CAPABILITIES; WHY GAO DID THIS STUDY; WHAT GAO RECOMMENDS; WHAT GAO FOUND; ABBREVIATIONS; RESULTS IN BRIEF; BACKGROUND; GPS System Description; Broader Management Structure; Broader Management Structure; GPS Modernization; AIR FORCE FACES SIGNIFICANT CHALLENGES IN ACQUIRING GPS SATELLITES

The IIF Program Was Not Well Executed, and Still Poses Technical ProblemsAir Force Improves Oversight of IIF, but Technical Issues Lead to More Delays; Problems Experienced in GPS IIF Seen in Other Space System Acquisitions; DOD Is Implementing Lessons Learned from the GPS IIF Program as It Starts the GPS IIIA Program, but Schedule Is Optimistic; The Air Force's Schedule for GPS IIIA May Be Optimistic; A Delay in GPS III Could Severely Impact GPS Users; A Delay in GPS III Could Affect GPS Constellation Performance; Both Military and Civilian GPS Users Would Be Affected by a Delay in GPS III

Different Approaches Are Being Evaluated that Could Potentially Mitigate the GapNEW SATELLITE CAPABILITIES WILL NOT BE LEVERAGED BECAUSE OF DELAYED DELIVERY OF GROUND AND USER EQUIPMENT CAPABILITIES; Air Force Has Deferred the Delivery of Ground Control Capabilities; Synchronization Problems Will also Delay Fielding of Improved GPS Capabilities to Military Users; Funding and Technical Issues Have Delayed User Equipment Development, but the Air Force Is Seeking to Accelerate Development; Efforts to Speed up Delivery of User Equipment Face Obstacles

PRUDENT STEPS TAKEN SO GPS CAN MEET BROADER NEEDS BUT CHALLENGES EXIST IN COORDINATING REQUIREMENTS AND ENSURING COMPATIBILITYThe Process for Approving GPS Civil Requirements is Rigorous but Untested; Civil Agencies Find the GPS Requirements Process Confusing; Coordinating GPS Activities with the International Community also Presents Challenges; Joint Statements of Cooperation Made and One Agreement Established; U.S. and European Commission Working to Address Concerns Regarding Access to Galileo Information; State Officials Believe International Efforts Lack Dedicated Resources; CONCLUSIONS

RECOMMENDATIONS FOR EXECUTIVE ACTIONAGENCY COMMENTS AND OUR EVALUATION; APPENDIX I: SCOPE AND METHODOLOGY; APPENDIX II: INTERNATIONAL GLOBAL SATELLITE NAVIGATION SYSTEMS; APPENDIX III: COOPERATION BETWEEN U.S. AND FOREIGN ENTITIES; APPENDIX IV: COMMENTS FROM THE DEPARTMENT OF DEFENSE; End Notes; Chapter 2: GPS HEARING- HUBER TESTIMONY; End Notes; Chapter 3: GPS HEARING- JAMES TESTIMONY; IMPORTANCE OF GPS; CONSTELLATION HEALTH AND GAP MANAGEMENT; CONCLUSION; Chapter 4: GPS HEARING- MCCASLAND TESTIMONY; RECENT SUCCESSES; PLANS TO SUSTAIN AND MODERNIZE; UNITY OF EFFORT; CONCLUSION

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