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Feedback on the New Datums

This feedback discusses the preparations and potential impact of the new datums on US Instrument Flight Procedures, obstacles, airport safety critical points, and navigation aids. It highlights the challenges and advantages of implementing the new reference frame and emphasizes the need for transition tools and increased outreach.

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Feedback on the New Datums

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  1. Feedback on the New Datums Federal Aviation Administration George P. Sempeles 2015 Geospatial Summit April 13 to 14, 2015

  2. Preparation • Major products/services potentially affected • US Instrument Flight Procedures; as of 3/5/2015 pub cycle • 14,305 RNAV (Satellite based) • 16,959 IAP (All types inclusive) • 1,741 SID/STAR (Departure/Approach) • 1,220 Airways (All types inclusive) • Millions of NGS/3rd party surveyed obstacles • ~ 325,600 constructed obstacles in the DOF (public use) • ~ 340,000 obstacles and vegetation in ORS (FAA use) • Tens of thousands of surveyed airport safety critical points (runway ends, displaced thresholds) • Thousands of NAVAIDS • Thousands of FIXs and Waypoints • Total 34,225!

  3. Preparation No preparations to date…. We will need to prepare an implementation plan with the roll out of the new datums to prevent a shutdown of instrument flight procedures NAS wide

  4. Advantages / Challenges • We are excited because...We will finally have a national geocentric reference frame that is more coincident with WGS 84 • Our concern is dependent upon the magnitude of the shiftIf small: • You can’t draw the difference on a chart • A pilot can’t fly the difference • Automated navigation systems can’t fly the difference • If large: • We may be faced with a recalculating all geodetic data used to support generating all aeronautical navigation products used in the US NAS • But…until the magnitude of the shift is known • Difficult to prepare for in terms of resources • Impact will not be known until periodic flight inspection of procedures

  5. Transition Tools / Outreach Needs • The tools, products, or services we need most (from NGS or others) are: • Advanced notice/estimate of the shift magnitude • Updated vertical and horizontal calculators • CONUS • Alaska • US Territories • The outreach we need most (from NGS or others): • NGS continue to host bi-annual summits and monthly updates • Possibly increase the frequency of summits (quarterly) the closer the new realization becomes reality

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