Cargando…
Sustaining the global positioning system /
| Clasificación: | Libro Electrónico |
|---|---|
| Otros Autores: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
New York :
Nova Science Publishers,
c2010.
|
| Colección: | Space science, exploration and policies series.
|
| Temas: | |
| Acceso en línea: | Texto completo |
Tabla de Contenidos:
- 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