Parabolic Dish

Summary of the available instrumentation


Here follow the summary tables listing the available instrumentation at the three telescopes.
For further 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
2.7
0.8
0.8
0.32
0.09
0.09
0.07
S
2.0
-
-
0.24
-
-
-
C-low
0.8
-
-
0.09
-
-
-
C-high
3.5
0.7
0.8
0.41
0.08
0.09
0.07
X
1.8
-
-
0.21
-
-
-
K
2.7
1.1
1.2
0.32
0.13
0.14
0.09
(a) Details on the RF frequency ranges are listed in the sections devoted to the single telescopes
All estimates assuming 1024 Mbps data rates. Computations: EVN sensitivity calculator.


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


 

Sardinia Radio Telescope


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(b)
 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), ROACH-1
 C-high 5.7-7.7
Single-feed,
cryo-cooled
VLBI, single-dish
32-37
2.7
0.60
TP, DBBC, DFB3,
XARCOS, SARDARA, ROACH-1
 K  18-26.5
7-feed,
cryo-cooled
VLBI, single-dish
90(c)
0.8
0.66
TP, DBBC (single-feed),
DFB3 (single-feed),
XARCOS, SARDARA,
ROACH-1 (single-feed)
(b) Full band (300-410 MHz) is not available due to RFI. This band is available for pulsar observations only
(c) @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

XARCOS
Narrow band spectrometer; up to four (for single-feeds) simultaneous bandwidths: 0.5, 2.0, 7.8, 62.5

Spectro-polarimeter

10 s

2048

SARDARA(d)
420, 1500

Spectro-polarimeter

Down to
5 ms

1024 or 16384

DFB3
256, 512, 1024

Correlator for pulsars

Typical:
100 μμs

Max 8192, for pulsar folding it is limited to 2048

ROACH1(e)
128 (8 x 16 MHz)

Baseband recorder

---

(varies with offline processing)

DBBC
512

VLBI

---

---

 (d) Sardara is still experimental; it is offered in shared-risk mode. Effective IF band is narrower than back-end filters, see technical information
 (e) ROACH1 is still experimental; it is offered in shared-risk mode




Medicina


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
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
 C-low  4.3-5.8
Single-feed,
cryo-cooled
VLBI, single-dish 28
7.4
0.16
TP, DBBC, XARCOS
 C-high  5.6-7.3
Single-feed
VLBI, single-dish(f)
60-90
5.4
0.15
TP, DBBC, XARCOS
 K  18-26.5
Dual-feed,
cryo-cooled
VLBI, single-dish 50-80
1.7
0.11
TP, DBBC (single-feed),
XARCOS (single-feed)

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

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

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

 




Noto


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 55(g)
30
TBD(g) DBBC
 S  2.21-2.39
 X  8.21-8.93
Dual-frequency,
coaxial feed
VLBI,
single dish (X only)
55(g)
TBD(g)
18
4.9
TBD(g)
TBD(g)
TP, DBBC
 C-low  4.62-5.02
Single-feed,
cryo-cooled
VLBI, single-dish 30
8
0.14
TP, DBBC
 C-high  5.1-7.25
Single-feed
VLBI 120
7.8
0.15(h)
DBBC
 K  21.5-23.0
Single-feed,
cryo-cooled
VLBI, single-dish
110
1.7
0.08
TP, DBBC
(g) These receivers will be installed at Noto during the semester and then offered in shared-risk. The given values are preliminary lab measures
(h) This value refers to LCP only. RCP has a maximum gain of 0.06 K/Jy


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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