US PNT Advisory Board (PNTAB) Thoughts on Assured PNT Professor Brad Parkinson Stanford University Thanks to Sponsors: FAA, Aerospace (But all opinions.

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Presentation transcript:

US PNT Advisory Board (PNTAB) Thoughts on Assured PNT Professor Brad Parkinson Stanford University Thanks to Sponsors: FAA, Aerospace (But all opinions are mine!)

PNT Advisory Board Views Primary PNTAB Objective: – Assured PNT for all users (Resilient!) Current Assessment – No current or foreseeable alternative to GNSS (primarily GPS) can deliver equivalent accuracy (to millimeters, 3D) and world wide 24/7 availability – But “Space-to-Earth” L-Band signals are very weak Therefore our Focus is PTA – Protect the radio spectrum + identify + prosecute interferers – Toughen GPS receivers against natural and human interference – Augment with additional PNT sources and techniques

Augment with additional PNT sources and techniques eLoran – Modernized DMEs for aviation Other GNSSs – “Only GPS is currently authorized for reception in US” – FCC – RTCA SC159 working on MOPS including other GNSS – No plans to add other GNSS to WAAS Summary of Results from Independent Review Board Re: Loran – Convened by US/DOS (2006) Unanimous Recommendation – deploy eLoran DOT, DHS, and PNT EXCOM supported this recommendation But eLoran was a victim of budget tightening, and dismantling or existing Loran stations began

eLoran Previously Recommended by PNT EXCOM Conclusions – (DOT IRB Dec. 2006): Assurance of PNT availability –a prudent & responsible policy – Critical safety-of-life & economic security applications eLoran is a cost-effective backup –to protect and extend GPS- for identified national critical GPS-based applications – Interoperable & independent – Different physical limitations & failure modes – Seamless operations & GPS threat deterrent Given US Government supportbelieve users will equip with eLoran as backup – International communitylooking for US leadership Summary of Results from Independent Review Board Re: Loran – Convened by US/DOS (2006) Unanimous Recommendation – deploy eLoran DOT, DHS, and PNT EXCOM supported this recommendation But eLoran was a victim of budget tightening, and dismantling or existing Loran stations began