Differences

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--- information_for_astronomers:user_guide:antenna [2022/03/25 08:27]
akraus
+++ information_for_astronomers:user_guide:antenna [2024/06/14 14:30] (current)
akraus
@@ Line 1: / Line 1: @@
-=== Antenna ===
+==== Antenna ====
 The 100-m telescope has a Gregorian design with a 100-m primary mirror (a paraboloid) and a 6.5-m secondary mirror (an ellipsoid).
@@ Line 17: / Line 17: @@
 the Altitude (elevation axis = reference point) is 416.825 m (height over the reference ellipsoid). These positions are based on
 [[https://www.ccivs.bkg.bund.de/index.php?uri=quarterly/stationcoordinates/xyz|geodetic VLBI observations]] of the
-[[http://ivscc.bkg.bund.de|Internation VLBI Service for Geodesy & Astrometry (IVS)]]. The cartesian coordinates
+[[http://ivscc.bkg.bund.de|International VLBI Service for Geodesy & Astrometry (IVS)]]. The cartesian coordinates
 <code>
 x = 4033947.225142 m
@@ Line 62: / Line 62: @@
 {{:information_for_astronomers:user_guide:10k.horizont.png|}}
+==== Focussing ====
+Focussing is possible in six axes (x, y, z - linear and rotational) - see the plot below for the definition of the coordinate system.
+Due to the homology of the telescope, the focal point is shifted when the telescope is being tilted, and the focus has to be adjusted accordingly.
+{{:information_for_astronomers:user_guide:100mrt_Focus.png?480|}}

Effelsberg 100m Teleskop