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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 Tecnológicos de Yebes
Instituto Geográfico 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 (150µµµµm rms): 70% @ 7mm, 50% @ 3mm.
▫ Pointing: requirement (5’’ @ 10m/sec), 1’’ servosystem
error.
Radio Telescope Structure
ARIES SUBSYSTEMSARIES SUBSYSTEMSARIES SUBSYSTEMSARIES SUBSYSTEMS
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, 45µm 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
Satélite
Specification Value
Allan deviation (BW=1Hz) 1000 sec and floor (2·10-15)
Phase Noise (5MHz) -130dBc/Hz @ 1Hz
Temperature sensitivity <5·10-15/Hz
Phase sensitivity 10 ps/K
Outputs 5, 10 and 100MHz; 1pps
Bandwidth Channels Resolution
1024MHz 512 2MHz
512MHz 1024 0.5MHz
256MHz 2048 125KHz
128MHz 2048 62.5Khz
Control roomControl roomControl roomControl room
Freq band BW (MHz) Trx (K)
S 2.2-2.37 170 <50
CH 3.22-3.39 170 <50
C 4.56-5.06
5.9-6.9
500
500
<10
<10
X 8.18-8.98 500 <10
K 21.75-22.85
23.35-24.45
500
500
<20
<20
W 84-116 600 <50
Holography 10.9-12.75 10 <75
TSYS(K)
170
170
35
35
65
65
70
150
120
Pol
RH/LHCP
RH/LHCP
RH/LHCP
RH/LHCP
RH/LHCP
RH/LHCP
RH/LHCP
lin/circ
RHCP
X band RxX band RxX band RxX band Rx
FI ModuleFI ModuleFI ModuleFI Module
Phase Cal UnitPhase Cal UnitPhase Cal UnitPhase Cal Unit
Bandwidth Channels Resolution
1500MHz 8192 212KHz
750MHz 16384 53KHz
500MHz 16384 35KHz
100MHz 16384 7Khz