« quasar » vlbi-network - present and future: 2010-2015

NRAO 27-28 January 2011


«Quasar» VLBI-Network -

Present and Future:

2010-2015

Andrey Finkelstein

Institute of Applied Astronomy

Russian Academy of Sciences


4281.7 km

4281.7 km

44404404..9 9 kmkm

22001144

.7 k

m.7

km

6185.1 km

6185.1 km

UssurijskUssurijsk

65216521..3 3 kmkm

23372337..0 0 kmkm

«Quasar» VLBI-Network - 2010

Svetloe (Sv)Svetloe (Sv)

Zelenchukskaya (Zc)Zelenchukskaya (Zc)

Badary (Bd)Badary (Bd)

St. PetersburgSt. Petersburg

2


Observatory «Svetloe» (Sv)http://195.131.14.60

Observatory «Zelenchukskaya» (Zc)http://83.239.123.252

Observatory «Badary» (Bd)http://90.188.52.253

Login: guest, Password: guest

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G -, C - and Kq - band receivers

S/X - band receivers

L - band receiver

Low Noise Receivers with Dual Polarization Channels

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Receivers and Antenna Parameters of the VLBI-Network «Quasar»

Wavelength, cm

Frequency Range,

GHz

Receiver Temp.,

K

System Temp.,

K

SEFD, Jy

Efficiency

21/18 1.38-1.72 8 43 240 0.62

13 2.15-2.50 10 48 330 0.50

6 4.60-5.10 8 27 140 0.65

3.5 8.18-9.08 11 34 200 0.59

1.3 22.02-22.52 20 80 710 0.40

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H-maser

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VLBI Data Acquisition System and Recording Terminals in «Svetloe» Observatory

I - Mark 5B Recording Terminal Rack, II – Mark IV DAS, III – Time-Frequency Output Units Rack,

IV – Four Channel Radiometer Output Units Rack

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Central Control Room of «Svetloe» Observatory

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Correlator Center of RAS(IAA, Sankt-Petersburg)

6-sites correlator

Computer on the basis of workstation Sun Fire X4600

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S/X - receiver

R1002 DataAcquisition System

Recording terminal Mark5B

H-maser

Phase CalibrationSystem (P-cal)

GPS/GLONASS receiver

Main computer

RT-70

Integration of «Quasar» VLBI-Network with Radio Telescope RT-70 (Ussurijsk, Far East)

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Main International Programs with IVS

IVS-R1, IVS-R4 – sessions carried out twice per week on Monday and Thursday for obtaining EOP;IVS-T2 ‑ sessions carried out once per two or three months for monitoring stations coordinates of the global VLBI-Network;IVS-Intensive ‑ sessions carried out twice per month for obtaining the Universal Time;EURO – sessions organized not rare than once per year; the purpose of this experiment is to determine station coordinates and their evolution in the European geodetic VLBI Network;VLBI-RDV – few sessions during a year for the aim of geodetic source mapping in collaboration with VLBA-Network;CONT – one session every four years for interdaily EOP effects determination

http://www.ipa.nw.ru/PAGE/rusipa.htm

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Contribution of «Quasar» VLBI-Network in IVS Programs

2008-2009

50 session per year

50 intensive session per year

less then 10 session per year

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Main Domestic Space Geodesy Programs

RU-E – 24-hour sessions carried out once per 2 weeks for determining all EOPs (Universal Time, pole coordinates, Celestial pole coordinates) using three observatories of the VLBI-Network «Quasar»

RU-U – 1-hour sessions once per 1 week for determining Universal Time using «Badary» – «Svetloe» or «Badary» - «Zelenchukskaya» baselines


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EOP Differences of IAA (RU-E) and IERS 05 C04 60 sessions

Red ― S2 recording system, green ― Mark 5B recording systemrms: Xp, Yp – 1.1 mas, UT1-UTC – 45 μs, Xc, Yc – 0.6 mas

xp yp

UT1-UTC

xc yc

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Baseline Length Time Series and Velocities

«Badary»–«Svetloe», L ― 4281660.537 m (94 sessions)

L = 4281660.537 ± 0.001 m (2007.98)V = 0.005 ± 0.001 m/year

«Svetloe»–«Zelenchukskaya», L ― 2014661.045 m (120 sessions)

«Badary»–«Zelenchukskaya», L ― 4404836.203 (95 sessions)

L = 2014661.045 ± 0.002 m (2007.98)V = 0.002 ± 0.001 m/year

L = 4404836.203 ± 0.002 m (2007.73)V = 0.004 ± 0.001 m/year

-0 .06-0 .04-0 .02

0 0 .02 0 .04 0 .06

2007 2008 2009 2010 2011

m

tim e , ye ar

B adary-S ve tlo e , B -4281660 .537 , m

-0 .06-0 .04-0 .02

0 0 .02 0 .04 0 .06

2006 2007 2008 2009 2010 2011

m

tim e , ye ar

S ve tlo e -Z e le nc huks kaya, B - 2014661 .045 , m

-0 .06-0 .04-0 .02

0 0 .02 0 .04 0 .06

2007 2008 2009 2010 2011

m

tim e , ye ar

B adary-Z e le nc huks kaya, B - 4404836 .203 , m

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Optical Fiber Lines of «Quasar» VLBI-Networkfor e-VLBI Mode - 2011

Network channel equipment

1 GbsNetwork channel

equipment 1 Gbs

Network channel equipment

1 Gbs

Backbone 10 Gbs

Маrk 5B Terminals

Маrk 5B

Маrk 5B

Маrk 5B

“Svetloe”

“Zelenchukskaya”

“Badary”

Sankt-Petersburg, IAA Correlator Center

19 км

100 Мbs

8 km

100 Мbs

5kм

1 Gbs

32 km

100 Мbs

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rms (UT1-UTC) = 60 μs

UT1-UTC Differences of IAA (RU-U) and IERS 05 C04 66 Sessions of e-VLBI Mode (Mark 5B, 1 hour)

UT1-UTC

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Satellite Laser Ranging System «Sazhen’-TM»

of «Quasar» VLBI-Netrwork: 2011

Satellites orbits – 400 – 23 000 kmNormal points accuracy – 1 cmAngular measurements accuracy – 1-2”Mirror diameter – 25 cmFrequency – 300 HzPulses energy – 2.5 mJMass – 120 kg

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Main Domestic Astrophysical Programs (single dishes)

Multifrequency monitoring of close double systems;

Observation of micro quasars and variable extragalactic radio sources;

Research of flux variability of geodetic radio sources;

Research of inter-diurnal flux variations of extragalactic radio sources;

Multifrequency monitoring of relativistic objects including γ-bursts;

Calibration of radio sources for radio astronomy flux scale.


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European VLBI-Network

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Main Astrophysical Programs (VLBI)

Mapping of extragalactic and galactic radio sources («Quasar»+EVN)

Mapping of geodetic radio sources(«Quasar» +EVN)

Ground-based Support of RADIOASTRON Mission(«Quasar»+others radio telescopes )

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«Quasar» VLBI Network Development: 2013-2015

Equipment of Ussurijsk 70-meter radio telescope with

L-, C-, G-, Kq-band recievers 2011

Installation of 2 new 12-meter diameter radio telescopes at «Zelenchukskaya» and «Badary» observatories 2013-2014

Installation of 3 absolute gravimeters at «Quasar» observatories 2014-2015

Equipment of «Quasar» VLBI-Network with transportable collocated station (VLBI, SLR, GNSS, AG) 2015

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St. Petersburg

4281.7 km

4281.7 km

44404404..99 km km

22001144

.7km

.7km

6185.1 km

6185.1 km

65216521..33 km km

23372337..00 кмкм

«Quasar» VLBI-Network - 2015

Svetloe

Zelenchukskaya

BadaryUssurijsk

Transportable colocated station

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Thank You for Your Attention

« quasar » vlbi-network - present and future: 2010-2015

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