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Meeting	ACGS Committee Meeting 110 - Auburn, Maine - October 2012
Agenda Location	9 SUBCOMMITTEE B – MISSILES AND SPACE 9.1 NESC Study of the Differing Global Satellite Navigation Satellite Systems
Title	NESC Study of the Differing Global Satellite Navigation Satellite Systems
Presenter	George Davis
Affiliation	Emergent Space
Available Downloads*	presentation
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Abstract	NASA Engineering and Safety Center (NESC) Study of the Global Navigation Satellite Systems (GNSS) Neil Dennehy, NASA; Dr. George Davis, Emergent Space Technologies; Frank H. Bauer, Emergent Space Technologies The NESC is sponsoring a study to understand the current state of Global Navigation Satellite Systems (GNSS) and technology and to predict their future trends to support NASA’s future endeavors. This is being initiated through a NASA survey of current and future GNSS systems and related technology capabilities. Given the continually evolving nature of these systems, NASA needs to have a thorough understanding of their capabilities, strengths, weaknesses and vulnerabilities in order to architect robust and reliable PNT (position, navigation & time) solutions for future NASA applications and missions. NASA also needs to understand the opportunities that may exist to improve data products using PNT sensing systems through additional signals of opportunity that could arise from GNSS interoperability enhancements. Finally, NASA needs to understand what future opportunities may exist to improve space science, robotics or exploration endeavors through the exploitation of these GNSS PNT signals and technologies. The results of this study will arm NASA leaders with the facts and data needed to understand the current and future state of the GNSS systems and make decisions accordingly. This presentation will provide an overview of the NESC GNSS study objectives, a status on the study efforts currently underway, details of some of the GNSS draft study products and an opportunity for study feedback to the presenters. The paper will also describe the study team’s next steps and future efforts.