Time reference and gps time

Outline 1. Global coordinate systems

2. Time reference and GPS time 3. GPS orbits and satellite position computations
4. Ground track of satellite orbits

1

Coordinate system definition

 To define a Cartesian coordinate system, we need to

dimensions.

The
in 3 the plane.

4

 CTRS is also known as Earth-Centre Earth-Fixed Realisation of a CTRS

Example of a CTRS realisation

INB/INB353 2009 7

Conventional inertial reference system (CIRS)