air navigation gnss
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Apostu Iuliana-Andreea
Ciuban Sebastian
Mciuc Rodica
Mitran Teodora
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Table of contents
1. Introduction
2. Operating principles
3. Disturbance
4. Augmentation systems
5. Differential Global Positioning System (DGPS)
6. European Geostationary Navigation OverlayService (EGNOS)
7. Advantages of satellite navigation in aviation
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1. Introduction
GPS (Global PositioningSystem) is a system ofsatellite navigation whichallows determination of
every globe position withhelp from signals receivedfrom satellites. Themeasurement accuracy
with such a system variesbetween 30 meters(military) and 150 meters(commercial).
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2. Operating principles
The satellitescontinuously broadcastsignals that containinformation about their
position, the status andthe exact time. Knowingthese information,we candetermine the distance
and we can calculate theposition of the objectusing the trilaterationmethod.
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3. Disturbance
Interference with radio broadcasts on UHF
Plants VOR (VHF Omnidirectional Range) and
DME (Distance Measuring Equipment)
May lose satellite position on curves
Elements of structure
Electromagnetic and atmospheric disturbance
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4. Augmentation
systems
Basic GPS gearevolved through the
next systems:
-ABAS (Aircraft Based
Augmentation System)-SBAS (Satellite Based
Augmentation System)
-GBAS (Ground Based
AugmentationSystem).
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5. Differential Global
Positioning System (DGPS) For improving the
accuracy in
determining the
position an improved
GPS system namedDGPS has been
developed. The
information received
from two or more
receptors are
compared every
moment with precise
data from a station.
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6. European Geostationary Navigation
Overlay Service (EGNOS)
EGNOS is the first project in
the GNSS field of Europebeing the precursor of
GALILEO.
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Being composed from 3geostationary satellitesand a network of 3 fixedstations positioned onground, EGNOS fulfillshis purpose bybroadcastinginformation that
contain the sent GPSsignals accuracy andconfidence.
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Advantages offered by EGNOS
Safety improvement during flight operations.
Minimizing the operational cost by eliminating theneed for auxiliary navigational gear in airports.
It allows the aircraft to land in hard weatherconditions
It reduces the fuel consumption and the CO2emissions
It increases the quality of horizontal and verticalguiding of the aircraft
Free service provided
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7. Advantages of satellite navigation
in aviation
Continuous and accurate positioning in every
flight stage
Free service provided
Increases the safety level during specific flight
operations
Reduces the fuel consumption
Better route planning
Continuous monitoring of aircrafts
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BIBLIOGRAFIE
http://www.esa.int/ESA
www.wikipedia.org
http://www.navipedia.net/ ,,Navigatie Aeriana Dumitru Popovici si
Constanting Popescu
http://www.esa.int/ESAhttp://www.wikipedia.org/http://www.navipedia.net/http://www.navipedia.net/http://www.wikipedia.org/http://www.esa.int/ESAhttp://www.esa.int/ESA
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