GPS and INS theory and operating characteristics

T-45C ADV INav-03

INav Review

LESSON NOTES

If you feel it necessary to again show the graphic depicting

VOR/TACAN Cones of Confusion, call up Seg 3/frame 6.

VOR/DME

NOTE: The acronym VORTAC describes a facility

in which a VOR and a TACAN station are collocated.

Operating characteristics are the same as VOR/

DME.

Same as VOR plus DME information

Both VOR frequency and TACAN channel must

be tuned (T-45C)

D. GPS and INS theory and operating characteristics

Sg 4, fr 5: Introduction to INav

Organization

GPS 2.1.12.1.1.1.1

INTRODUCTION to INAV

THEORY: GPS is a 24+ satellite-based

Responsibilities of ATC

facilities

navigation, positioning, and time transfer

Clearances

system. GPS satellites transmit identity,

TACAN/VOR characteristics

calibration, and time signals. Aircraft use

GPS/INS characteristics

passive receivers to process that satellite data.

ILS characteristics

Triangulation and sensed aircraft flight path

angles are used to compute aircraft position.

Sg 4, fr 6: Global Positioning

System (GPS)

Altitude can also be extrapolated using GPS

signals

NOTE: The T-45C does not use GPS to

generate cockpit altitude information. The

T-45C GPS and INS are linked together in the

Global Positioning System/Inertial Navigation

Assembly (GINA).

GPS Standard Position Service (SPS) has 100

meters horizontal positioning accuracy with a

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