United States Department of Transportation
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RNAV (GPS) total system error models for use in wake encounter risk analysis of dependent paired approaches to closely-spaced parallel runways : Project memorandum - February 2014
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2014-02-01
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[PDF-1.26 MB]
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Alternative Title:Wake Turbulence Research Program
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Abstract:The purpose of this memorandum is to provide recommended Total System Error (TSE) models
for aircraft using RNAV (GPS) guidance when analyzing the wake encounter risk of proposed
simultaneous dependent (“paired”) approach operations to Closely Spaced Parallel Runways
(CSPR, defined as having centerline spacing less than 2,500 feet). RNAV (GPS) is being evaluated as a source of guidance to aircraft approaching one or both runways of specific CSPR pairs, in lieu of or in addition to ILS guidance, for possible inclusion in future changes to FAA Order 7110.308 and/or in future orders authorizing Wake Turbulence Mitigation for Arrivals – Procedure‐based (WTMA‐P).
This memorandum supersedes Project Memorandum DOT‐VNTSC‐FAA‐13‐08, which is now
obsolete. The primary differences from DOT‐VNTSC‐FAA‐13‐08 are: (1) the lateral NSE and FTE
models for LNAV/VNAV operations are changed, and (2) recommended analysis approaches
and possible operational restrictions are included for situations when both aircraft employ
baro‐VNAV vertical guidance.
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