Tropospheric calibration for VLBI GFZ Potsdam, 21'3'2006

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Tropospheric calibration for VLBIGFZ Potsdam,
21.3.2006

• Tropospheric Calibration
• Using
• GPS
• Helge Rottmann
• MPIfR Bonn

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Tropospheric calibration for VLBIGFZ Potsdam,
21.3.2006

• Using GPS for VLBI phase calibration
• Pros
• Many VLBI telescopes have co-located GPS
  receiver
• Dense network of GPS Stations
• Inexpensive (compared to radiometers)
• Cons
• Coarse time sampling
• Zenith solutions

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Tropospheric calibration for VLBI GFZ Potsdam,
21.3.2006

• GPS Stations
• Euskirchen
• Bonn
• Mayen
• Koblenz
• Essen
• Effelsberg (2007)
• Scale ZWD to Effelsberg altitude
• ZWD ZWD0 exp((hGPS hEff) / scaleHeight)
• Using scaleHeight 1.8 km

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Tropospheric calibration for VLBI GFZ Potsdam,
21.3.2006
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Tropospheric calibration for VLBI GFZ Potsdam,
21.3.2006
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Tropospheric calibration for VLBI GFZ Potsdam,
21.3.2006
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Tropospheric calibration for VLBI GFZ Potsdam,
21.3.2006