Technische Daten

Technical Data of the 100m-telescope

Location:
D- 53902 Bad-Muenstereifel-Effelsberg
geographic longitude 653’ 01.0” East
geographic latitude 5031’ 29.4” North
height above sea level 319 m
height above sea level (elevation axis) 369 m
Constrution period 1967–1971

Foundation:
Quantity of concrete: 5200 m3
Piles: number 134
lenght 8–12 m
diameter 1,2 m
Azimut-track diameter 64 m
At the track an arc second is equivalent to 0,155 mm
Precision of the track under load 0,3 mm

Steel construction:
Total weight 3200 t
Weight of the tiltable part ca. 1950 t
Maximum height (tilted!) 109 m
Height at elevation axis 50 m
Height of the base frame (over ground) 2 m
Height of the box girder 3 m
Height of the elevation platform (over ground) 20,3 m
Height of the cabletwist 12 m

Mainreflector:
Paraboloid diameter 100 m
Focal lemght 30 m
Reflector depth 20,83 m
Number of panels 2360
solid over 1496
Area plain 9090 m2
Aperture 7850 m2
Accuracy of an individual panel 0,3–0,5 mm
Alignment accuracy of a panel 0,2 mm
Size of the pipes 51–419 mm
Radius of the elevation gear rig 28 m
At the gear rig an arc sec equated to 0,136 mm
Mean surface error 0,5 mm

Subreflector (Gregory):
Ellipsodial mirror with a diameter of 6,5 m
Distance of the focal points 24,5 m
Distance to the main reflector 32,055 m
Diameter of the central opening 1,25 m
Number of panels 96
Surface error of one panel ~ 10 µm
Mean surface error ≤ 60 µm

Receivier cabines:
Primaryfocus dimension ca. 6x6x6 m3
max. possible reciever 9
Secondary focus (Apex) heigth 7,2 m
diameter 6,2 m
number of reciever systemes 9
number of horns 19

electrical power supply:
2 transformaters, 20kV/400V, convective cooling   800 kVA
Emergency diesel generator 400 kVA
Emergency-Battery 235 V 288 Ah

Drive:
max. slewing (Azimuth) (0= North, 90= East) 30–510
during observation 33,5–506,5
zero point of the slewing range (quiescent point of the cabeltwist) 270 (West)
max. tilt (Elevation) 7,5–94
during observation 8,1–89
Azimuth:
friction drive with 16 driving wheels
16 DC -shunt motors effective power each 17,5 kW
max. speed 32 deg/min
time for a rotation of 360 approx. 15 min
Elevation:
geardrive with 2 drive units
per 2 DC -shunt motors effective power each 17,5 kW
max. speed 16 deg/min
time for a tilt from 7,5–90 approx. 5 min

controlcircuit:
1. power (digital): tension transmission max. 10 % in astronimic use
2. drive (analog): 3 - 2500 U/min
3. position (computer controlled): max. accurateness ~ 0,1 arcsec
effective (pointing) 1–2 arcsec (~ 0.2 mm)
 
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