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ABSOLUTE NAVIGATION SYSTEMS

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ABSOLUTE NAVIGATION SYSTEMS. Definition: ... A waypoint is simply an imaginary point in space defined in the coordinate system being used ... – PowerPoint PPT presentation

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Title: ABSOLUTE NAVIGATION SYSTEMS


1
ABSOLUTE NAVIGATION SYSTEMS
Definition An absolute navigation system
provides vehicle position referred to a general
coordinate system. e.g. - Latitude/Longitude -
local Cartesian
2
ABSOLUTE NAVIGATION SYSTEMS
Waypoints The straight segments of a route are
usually called legs In relative navigation the
endpoints of legs are defined by a facility (VOR,
NDB, TACAN) In absolute navigation there are no
such facilities and so legs are defined by
waypoints A waypoint is simply an imaginary
point in space defined in the coordinate system
being used Can be 2 or 3-dimensional)
3
ABSOLUTE NAVIGATION SYSTEMS
  • Special Requirements for Absolute Navigation
  • Accurate survey of ground stations (if used, e.g.
    LORAN C)
  • Accurate survey of Airway waypoints
  • Accurate data base of airway waypoints, facility
    locationsSize of data base depends on area of
    operation- updated every 28 daysGood
    Configuration Control is MandatoryMany
    opportunities for error

4
ABSOLUTE NAVIGATION SYSTEMS
  • Importance of Accurate Data Bases
  • Mount Erebus

5
ABSOLUTE NAVIGATION SYSTEMS
Importance of Accurate Data Bases Mount Erebus
(Antarctica)
6
ABSOLUTE NAVIGATION SYSTEMS
Importance of Accurate Data Bases Mount Erebus
(Antarctica)
7
ABSOLUTE NAVIGATION SYSTEMS
  • Advantages
  • Unlimited freedom to define airway structures
  • Fewer ground-base facilities less cost
  • Greater flexibility for flight-planning but
    greater complexity for ATC (Air Traffic Control)

8
ABSOLUTE NAVIGATION SYSTEMS
  • Absolute Navigation Systems in Use Today
  • LORAN C
  • INS (Inertial Navigation)
  • GPS (Global Positioning System)
  • Multi-DME,
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