Lecture 11: Global Positioning System (GPS) Lecture 11: Global Positioning System (GPS)
Global Positioning System
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Transcript of Global Positioning System
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Using GPS Techniques in
Surveys
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Navigation and Positioning are
Crucial to So Many Activities
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GPS Satellites
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Geometric Idea, Using a Satellite
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Using 2 Satellites
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Using 3 Satellites
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Mathematical Idea; V * T = D
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Satellites Have Precise Atomic Clocks
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Precise Orbit
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GPS Satellites Positions are very
Predictable
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Radar Checks each Satellite
Altitude, Position and Speed
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Minor Variations
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Earth’s Atmosphere Causes Delays in
the GPS Signals
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Ionosphere & Troposphere,
Error Sources
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Multi-path Error
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Ephemeris Errors, GDOP
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Good Configuration
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Differential GPS
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Static Surveying by GPS
GPS at reference station
Remote/rover receiver
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Rapid Static Surveying by GPS
GPS at reference station
Remote/rover receiver
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Kinematic Surveying by GPS
GPS at reference station
Remote/rover receiver
Initialization station
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GPS Applications
Location
Navigation
Tracking
Mapping
Timing
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i
X1
Y1
Z1
Z2
Y2
X2
i
r0
ri
Z
X Y
وسائط التحويل
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Topcon , Software and
Hardware
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Transformation Parameters
between Satellite & Geodetic
Systems
3 Translations:
X Y Z
3 Rotations:
X Y Z
1 Scale Difference:
S