RNAV (GPS) Total System Error Models for Use in Wake Encounter Risk Analysis of Dependent Paired Approaches to Closely‐Spaced Parallel Runways

The purpose of this memorandum is to provide recommended Total System Error (TSE) models for aircraft using Area Navigation (RNAV) Global Positioning System (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 instrument landing system (ILS) guidance, for possible inclusion in future changes to Federal Aviation Administration (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 navigation system error (NSE) and flight technical error (FTE) models for lateral navigation/vertical navigation (LNAV/VNAV) operations are changed, and (2) recommended analysis approaches and possible operational restrictions are included for situations when both aircraft employ Barometric‐Vertical Navigation (Baro‐VNAV) vertical guidance.

  • Record URL:
  • Corporate Authors:

    Federal Aviation Administration

    800 Independence Avenue, SW
    Washington, DC  United States  20591

    Research and Innovative Technology Administration

    Volpe National Transportation Systems Center, 55 Broadway
    Cambridge, MA  United States  02142
  • Authors:
    • Geyer, Michael
    • Soares, Melanie
    • Barnes, Steve
    • Hoff, Ashley
    • Mackey, Steve
  • Publication Date: 2014-2


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Project Memorandum
  • Features: Figures; References; Tables;
  • Pagination: 39p

Subject/Index Terms

Filing Info

  • Accession Number: 01522285
  • Record Type: Publication
  • Report/Paper Numbers: DOT‐VNTSC‐FAA‐14‐05
  • Created Date: Apr 15 2014 3:10PM