Parabolic Dish

Summary of the available instrumentation


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Here follow the summary tables listing the available instrumentation at the three telescopes. For each telescope, the first table provides constantly-updated information on the temporary unavailability of instruments and devices.
For further technical detail, please visit the specific sections linked here.


Italian VLBI


Notice: extra-EVN interferometry projects can involve any of the Italian antennas, as well as international facilities (PIs are requested to arrange such collaborations prior to the submission of a proposal). Here only the main characteristics of the italian sub-network are provided.

MAXIMUM ANGULAR RESOLUTION
Band(a)
Theta Mc-Nt
(mas)		 lambda
(cm)
L
 41.5
 18
C-low 13.8
 6
C-high
 11.5
 5
X
 8.3
 3.6
K
 3.0
 1.3


SENSITIVITY
Band(a)
Baseline
sensitivity
Mc-Nt
(5', mJy)		 Baseline
sensitivity
Mc-Sr
(5', mJy) 		Baseline
sensitivity
Nt-Sr
(5', mJy) 		Image
sensitivity
Mc-Nt
(6h, mJy) 		Image
sensitivity
Mc-Sr
(6h, mJy) 		Image
sensitivity
Nt-Sr
(6h, mJy) 		Image
sensitivity
McNtSr
(6h, mJy)
L
 1.86
 0.56
 0.57
 0.22
 0.07
 0.07
 0.05
S
 		1.12
 -
 -
 0.13
 -
 -
 -
C-low
 0.54
 (TBD) (TBD) 0.06
 (TBD) (TBD) (TBD)
C-high
 2.48
 0.53
 0.61
 0.29
 0.06
 0.07
 0.05
X
 1.34
 -
 -
 0.16
 -
 -
 -
K
 1.93
 0.80
 0.86
 0.23
 0.09
 0.10
 0.07
(a) Details on the RF frequency ranges are listed in the sections devoted to the single telescopes
All estimates assuming 2048 Mbps data rates. Computations: EVN sensitivity calculator, http://old.evlbi.org/cgi-bin/EVNcalc 


CONTINUOUS CALIBRATION AVAILABILITY(b)
Telescope
L band S band C-low band
 C-high band
 X band
 K band
Mc
 v
 x
 		v
 		v
 		v
 		v
Nt
 		v v v
 		v
 		v v
Sr
 x
 		x
 		x
 v x v
(b) The DBBC allows to detect synchronously an 80 Hz signal integrating the power from the cal off and cal on phases.                   


UV COVERAGE
Plots of the UV coverage for DEC-10, DEC+30 and DEC+70 are shown in this PDF file.


 

Sardinia Radio Telescope


INFO on CURRENTLY UNAVAILABLE DEVICES (scroll table; contact us for additional details)


RECEIVERS
 RF band
 (GHz)
 Type
 Offered for
 Tsys @90°EL
(K)
 Beamsize
(arcmin)
 Max gain
(K/Jy)
 Connected back-ends
 P  0.30-0.36(c)
 L  1.3-1.8
Dual frequency
coaxial feed,
cryo-cooled
 VLBI,
single-dish
 50-80
25-35
 48
12.6
 0.52
0.55
DBBC,
DFB3 (L band only),
SARDARA (L band only)
 C-low 4.2-5.6
Single-feed,
cryo-cooled
 VLBI, single-dish
 25
 3.9
 0.64
TP, DBBC, DFB3,
SARDARA, SKARAB
 C-high 5.7-7.7
Single-feed,
cryo-cooled
 VLBI, single-dish
 32-37
 2.7
 0.60
TP, DBBC, DFB3,
SARDARA, SKARAB
 K  18-26.5
7-feed,
cryo-cooled
 VLBI, single-dish
 70(d)
 0.8
 0.66
TP, DBBC (single-feed),
DFB3 (single-feed),
SARDARA, SKARAB
(c) Full band (300-410 MHz) is not available due to RFI. This band is available for pulsar observations only
(d) @22.3 GHz, with tau0=0.1 and ground-level atmospheric temperature Tg=293 K

 

BACK-ENDS

Name
available bandwidths (MHz)

Type

Integr. time

Max frequency bins

TP
250, 680, 1200 (C and K bands only),
2000 (C and K bands only)

Analog
total power

1-1000 ms

1

SARDARA(e)
420, 1000 (L-band only, no f-track), 1500

Spectro-polarimeter

Down to
5 ms

1024 or 16384

DFB3
1024

Correlator for pulsars

Typical:
100 μμs

2048

SKARAB(f)
16, 20, 23, 32, 40, 46.875, 64, 80, 93.75, 128, 160, 187.5, 1400 (2048 or 32K bins, full Stokes)

Spectro-polarimeter

1 ms to 1 s

65536 spectra only
32768 full Stokes

DBBC
512

VLBI

---

---

(e) IF bandwidth can be narrower than back-end filters
(f) offered in shared-risk mode




Medicina


INFO on CURRENTLY UNAVAILABLE DEVICES (scroll table; contact us for additional details)

RECEIVERS
 RF band
 (GHz)
 Type
 Offered for
 Tsys @90°EL
(K)
 Beamsize
(arcmin)
 Max gain
(K/Jy)
 Connected back-ends
 L  1.35-1.45
     1.595-1.715
 Dual-channel,
mono-feed
 VLBI, single-dish
(via DBBC only)
 55
65
 27.5
31.2
 0.12
0.11
  DBBC
 S  2.2-2.36
 X  8.18-8.98
 Dual-frequency,
coaxial feed,
cryo-cooled
 VLBI,
single dish (X only)
 55
38
 18
4.9
 0.12
0.14
 TP, DBBC, XARCOS,
SARDARA
 C-low  4.3-5.8
 Single-feed,
cryo-cooled
 VLBI, single-dish 28
 7.4
 0.16
 TP, DBBC, XARCOS,
SARDARA
 C-high  5.6-7.3
 Single-feed
 VLBI, single-dish(g)
 60-90
 6.8
 0.15
 TP, DBBC, XARCOS,
SARDARA
 K  18-26.5
 Dual-feed,
cryo-cooled
 VLBI, single-dish 50-80
 1.7
 0.11
 TP, DBBC (single-feed),
XARCOS (single-feed),
SARDARA (single-feed)

(g) This receiver is offered in shared-risk mode for single-dish observations. Due to RFI, only a limited bandwidth can be exploited

General note: improved parameters, after the installation of the new primary mirror surface and the new subreflector, are still being assessed.
The table above provides pre-upgrade (i.e. conservative) values. 

BACK-ENDS

Name
available bandwidths (MHz)

Type

Integr. time

Max frequency bins

TP
250, 680, 1200 (C and K bands only), 2000 (K band only)

Analog
total power

1-1000 ms

1

SARDARA(h)
1500, 430

Spectro-polarimeter

Down to
5 ms

1024 or 16384

XARCOS
Narrow band spectrometer; up to four simultaneous bandwidths: 0.5, 2.0, 7.8, 62.5

Spectro-polarimeter

10 s

2048

DBBC
400

VLBI

0.1-1 s

4096

 (h) Offered in shared risk. IF bandwidth can be narrower than back-end filter




Noto


INFO on CURRENTLY UNAVAILABLE DEVICES (scroll table; contact us for additional details)

RECEIVERS
 RF band
 (GHz)
 Type
 Offered for
 Tsys @90°EL
(K)
 Beamsize
(arcmin)
 Max gain
(K/Jy)
 Connected back-ends
 L  1.32-1.72
 Single-feed VLBI 70
 30
 0.10 DBBC
 S  2.21-2.39
 X  8.21-8.93
 Dual-frequency,
coaxial feed
 VLBI,
single dish (X only)
 50
90 		18
4.9
 0.11
0.108
 TP, DBBC
 C-low  4.62-5.02(i) Single-feed,
cryo-cooled
 VLBI, single-dish 30
 8
 0.14
 TP, DBBC
 C-high  5.1-7.25(i) Single-feed
 VLBI 120
 7.8
 0.15
 DBBC
 K  22.0-24.0(m) Single-feed,
cryo-cooled 		VLBI, single-dish
 110
 1.7
 0.08
 TP, DBBC
  (i) This receiver is under refurbishment. Final values for its features will be available after post-refurbishment characterization.
 (m) New receiver - offered in shared risk. Actual measurements for its features will be available after in-antenna characterization.


BACK-ENDS

Name
available bandwidths (MHz)

Type

Integr. time

Max frequency bins

TP
250, 680

Analog
total power

1-1000 ms

1

DBBC
400

VLBI

0.1-1 s

4096



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