1 Observations. Sat05_71.ppt, 2005-11-28. Directions: satellite visible with stars as background. Direction to radio-source (VLBI) Directions and distances:

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Presentation transcript:

1 Observations. Sat05_71.ppt, Directions: satellite visible with stars as background. Direction to radio-source (VLBI) Directions and distances: if satellite carries reflectors

2 Stellar-triangulation. Sat05_71.ppt

3 Global network. Sat05_71.ppt

4 West-European Network. sat05_71.ppt

5 North-American Network: First results for Greenland

6 Distances. Sat05_71.ppt, Reflected light: Lasers – 2-ways. SLR= Satellite Laser Ranging. aus.com/satellite_laser_ranging.htm Satellite emits signal: 1 way or two ways.

7 Laser

8 LAGEOS

9 Earth-Moon system

10 Distance measurements. Sat05_71.ppt, Signal: Impuls: Phase: λ Δλ

11 Integer ambiguity. Sat05_71.ppt, N may be determined using Signal with several frequencies Several observations

12 Distance-differences. Doppler. Sat05_71.ppt, Observations:

13 Satellite Altimetry. Sat05_71.ppt, Geos-3, GSFO SEASAT Topex/Poseidon, Jason, ERS1 + 2, Envisat and CRYOSAT Satellite Water – Ice - Plains

14 Satellite-to-Satellite Tracking. Sat05_71.ppt, CHAMP, from GPS to satellite GRACE. from GPS to two satellites and ranging between the satellites GOCE, from GPS to the satellite.

15 Interferometry. Sat05_71.ppt,

16 VLBI. Sat05_71.ppt,

17 Results. Sat05_71.ppt,