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1 Signal Propagation (Seeber, 2.3).. 2 Ch. 3 Clock definition.

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Presentation on theme: "1 Signal Propagation (Seeber, 2.3).. 2 Ch. 3 Clock definition."— Presentation transcript:

1 1 Signal Propagation (Seeber, 2.3).

2 2 Ch. 3 Clock definition.

3 3 Ch. 3 Electromagnetic waves.

4 4 Ch. 3. Dispersion, Phase and group velocity. Dispersive medium: velocity depends on frequency, (due to resonance) Velocity of particular wave with uniform wavelength: phase velocity, v p Velocity of wave-group (several waves): v g.

5 5 Ch. 3, Frequency domains

6 6.

7 7 Ch. 3: Atmosphere.

8 8 Ch. 3, Ionosphere, layers. Characterized by electron density, e, number of electrons per m 3.

9 9 Ch. 3, Total electron density, TEC..

10 10 Ch. 3, Solar activity http://www.dxlc.com/solar/solcycle.html.

11 11 Ch. 3, Dispersion in ionized gas.

12 12 Ch. 3, Effect on propagation..

13 13 Ch. 3, Effect on group and phase. http://www.aiub.unibe.ch/ionosphere/meantec_hr.gif.

14 14 Ch. 3, Troposphere..

15 15 Ch. 3, Range difference..

16 16 Ch. 3, Integration along curved path..

17 17 Ch. 3, Atmosphere models http://modelweb.gsfc.nasa.gov/ http://www.gst.ucar.edu/gpsrg/realtime/ http://www.gpsatm.oma.be/Tropospheric- Products/WVR_GPS_Comparisons_Main.php


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