IGN Yebes 40m Radio Telescope
of 2
/2
-
Author
real-observatorio-de-madrid -
Category
Documents
-
view
281 -
download
1
Embed Size (px)
description
General description of the 40-m radio telescope of IGN in Yebes (Spain).
Transcript of IGN Yebes 40m Radio Telescope
-
Phone: (+34) 949290311 Fax: (+34) 949290063
Cerro de la Palera s/n 19141 - Yebes Guadalajara Spain
Phone: (+34) 949290311 Fax: (+34) 949290063
Email: [email protected]@[email protected]@oan.es
ARIES
The Center for Technological Developments (CDT) is a
branch of the National Geographic Institute of Spain.
VLBI
- Astronomy
- Geodesy
- Space
Single dish
- Centimeter
- Milimeter
Propagation experiments: Atmosphere
Projects Yebes Technological Development Center
Centro de Desarrollos Tecnolgicos de Yebes
Instituto Geogrfico Nacional (Spain)
Yebes Technological Development Center
-
Optics of the 40m Radio Telescope
Nasmyth-Cassegrain.
Main diameter: 40 meters.
Secondary diameter: 3.28 m.
F/D=0.375, Fe/D=7.9 (Mag=21.09)
Mounting: Az/El, turning head over
bearing.
Operation: Primary and Nasmyth.
Aperture efficiency (150m rms): 70% @ 7mm, 50% @ 3mm.
Pointing: requirement (5 @ 10m/sec), 1 servosystem
error.
Radio Telescope Structure
#4+'557$5;56'/5#4+'557$5;56'/5#4+'557$5;56'/5#4+'557$5;56'/5
Servosystem
Main drives
Subreflector.
Nasmyth mirrors.
Focal mirrors (AMS).
Auxiliary (stow, shutter).
Four motors per axis, two positions subreflector + focus,
moving nasmyth mirrors, AMS five displacements.
Movement range: Az (-90, +430deg), El (0, +90deg).
Maximum speed: Az (3deg/sec), El (1deg/sec). Minimum
speed: 0.1mdeg/sec.
Receivers Cabin
Size: 8x9x3.5 m3
Multiple receivers.
Automatization.
Receivers (S, CH, C, X,
22Ghz, Q, 3mm).
Nasmyth mirrors (M3 moving in elevation, turn 180deg; M4 &
M4 two fixed positions: 0deg horizontal and 20deg tilted).
Flat mirrors, aluminium film, elliptical shape, 45m rms
accuracy.
Back-ends and Control Room
Digital Autocorrelator.
FFT Spectrometer.
VLBI back-ends.
PrimaryPrimaryPrimaryPrimary
Time and Frequency System
iMaser 3000 (T4 Science) - Smart Active Hydrogen Maser Clock.
Holography
Receivers
Counter Counter Counter Counter
WeightsWeightsWeightsWeights
SecondarySecondarySecondarySecondary
ForkForkForkFork
Azimut Azimut Azimut Azimut
BearingBearingBearingBearing
PanelsPanelsPanelsPanels
SubreflectorSubreflectorSubreflectorSubreflector
R
T
Satlite
Specification Value
Allan deviation (BW=1Hz) 1000 sec and floor (210-15)
Phase Noise (5MHz) -130dBc/Hz @ 1Hz
Temperature sensitivity
