Irbene radiotelescope RT-32
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1 Irbene radiotelescope RT-32 V.Bezrukovs VIRAC, Latvia EVN TOG 28 June, 2012
2 Outline Ø RT- 32 Current status Ø Irbene Radio telescope RT- 32 prepara7on for observa7ons. Ø VLBI observa7on of naviga7on satellites, 6 10 Apr 2012; Ø EVN fringe test, FR012ab,12 Apr 2012 Ø Space debris observa7on experiment Debris2012, Apr 2012;
3 Ventspils Interna/onal Radio Astronomy Center (VIRAC)
4 Engineering Research Ins/tute Ventspils Interna/onal Radioastronomy Center (ERI VIRAC) History the secret Soviet military space center is established two parabolic antennas with diameters 32 (RT-32) and 16 (RT-16) meters are built after withdrawal the Soviet Army antennas become to Latvian Academy of Science. Telescopes are heavy damaged, any documentation is absent. Soon VIRAC is established First antenna movement and radio astronomical observations VIRAC merges with VUC VIRAC merges Engineering Research Instititute of VUC. Engineering Research Institute Ventspils International Radioastronomy Center is established.
5 Ventspils Interna/onal Radio Astronomy Center Fundamental research in astronomy and astrophysics v Very Long Base Line Interfereometry (VLBI) v European VLBI Network (EVN) v Low Frequency VLBI Network (LFVN) v Space debris and small planets radioloca7on v Astrophysics and astrometry research v Solar radio astronomy v Astrochemistry v Ac7ve galac7c Nuclei High performance compu/ng v VLBI data processing and modeling v Radiotelescope RT- 32 and RT- 16 control system op7miza7on v MHD modeling and solid- state mechanics v Mathema7cal modeling v Medical engineering Applied research in the space field v Satellite naviga7on and satellite communica7on research v Satellite naviga7on (GPS, Galileo, GLONASS) v Space geodesy v Satellite signal processing v Space communica7ons v Satellite data processing v Signal and image processing v Satellite components research and development Applied engineering and electronics v Fast prototyping research laboratory v Renewable energy research and energy efficiency studies v Small power generators v Wind energy research v Intelligent network studies v Smart house applica7ons v Digital TV applica7ons v Economical studies group
6 Ventspils Interna7onal Radio Astronomy Centre Ventspils University College Kristals RT- 2 RT- 16 RT- 32
7 VLBI- sta/on RT- 32 (Irbene, VIRAC) N, E VLBI- equipment: Working frequency range: 327, 1 600, 5 010, MHz Frequency converter: DBBC, MK- II Recording system: MK- V B,TN- 16, MK- II Synchroniza/on system: Hydrogen Maser Quartz CH- 75A, synchronized by GPS
8 5 GHz receiving system on RT- 32 Signal receiving and registration system on radiotelescope RT GHz horn LCP and RCP Bandwidth 400 MHz Noise temp 100K 5010 MHz receiver with 1 st and 2 nd amplifier 5010 MHz 5 MHz Mixer and 4580 MHz synthesizer <1000 MHz 5 MHz H maser clock 5 MHz 5 MHz Freq. sintez. Freq. sintez. 10 MHz 4 MHz TN-16 DBBC 2 MHz Mark5b 1 PPS 1 PPS GPS PC, HDD Network
9 5 GHz receiver prepara/on and installa/on works on RT- 32 ü RT- 32 telescope focal cabin reconstructed; new shelves for equipment; RF and power connec7on; Heated, herme7c room for receiving equipment prepared; Created and installed new system for precise receiver alignment; ü Feeder for 5 GHz receiver mounted; ü 5 GHz cryogenic receiver mounted, connected and tested; ü
10 5 GHz receiving system on RT- 32
11 VLBI observations: Ø EVN network; Ø Low Frequency VLBI Network Project; Ø Navigation satellites observations and ionosphere research;
12 EVN experiment FR012a,b; 12 Apr 2012 Equipment used in this test: Receiver: 5 GHz LCP and RCP receiver (400 MHz Bandwidth, 100 K); LO: R&S signal generator; LO=4600 MHz; Synchronization: Hydrogen Maser Quartz CH-75A, 5 MHz; Symmetricom GPS receiver XL-GPS DBBC system IFB -> LCP ; IFB -> RCP DBBC synchronization: R&S signal generator (10 MHz); Data recorder: Mark5b (Red Hat linux).
13 EVN experiment FR012a,b; 12 Apr 2012 Antennas: Onsala; Torun; Irbene; Frequency: 5 GHz; Polariza7ons: LCP and RCP; Channels FR012a: 2 ch.,64 Mbps FR012b: 16 ch. 512 Mbps
14 EVN experiment FR012a,b; 12 Apr 2012: Results FR012A - Irbene ftp fringe test - selected results from the JIVE software correlator April, Mbps, 1 BBC * 8 MHz * 2-bit sampling scan02 On, Tr, Ir: 2 sec integration time, source = 3C84 scan06 On, Tr, Ir: 4 sec integration time, source = 3C84 scan10 On, Tr, Ir: 2 sec integration time, source = scan14 On, Tr, Ir: 4 sec integration time, source = scan18 On, Tr, Ir: 4 sec integration time, source = 3C84 scan22 Tr, Ir: 4 sec integration time, source =
15 EVN experiment FR012a,b; 12 Apr 2012: Results FR012A - Irbene ftp fringe test - selected results from the JIVE software correlator April, Mbps, 1 BBC * 8 MHz * 2-bit sampling scan18 On, Tr, Ir: 4 sec integration time, source = 3C84 Torun - Onsala Irbene - Onsala Irbene - Torun
16 EVN experiment FR012a,b; 12 Apr 2012: Results FR012B - Irbene ftp fringe test - selected results from the JIVE software correlator April, Mbps, 8 BBCs * 8 MHz * 2-bit sampling scan26 Ir, Tr: 4 sec integration time, source = 3C84 scan30 Ir, Tr, On: 4 sec integration time, source = scan34 Ir, Tr, On: 4 sec integration time, source = 3C84 scan38 Ir, Tr, On: 4 sec integration time, source = scan41 Ir, Tr, On: 4 sec integration time, source = 3C84
17 EVN experiment FR012a,b; 12 Apr 2012: Results FR012B - Irbene ftp fringe test - selected results from the JIVE software correlator
18 Project: Signals related to Ar/ficial Earth Satellites: Technologies of Receiving, Transmicng and Processing Ø Started: December 2009; Ø Involved more then 20 researchers. Nr. 2009/0231/1DP/ /09/APIA/VIAA/151 Ø Reconstruc7on of the telescope RT- 16, includes research in the fields of electronics, mechanics and mathema7cal modeling. Ø Developing and applying methods for processing of recorded data. Ø Space debris radioloca/on using the radio telescope RT- 32 and the VLBI techniques. Soeware correlator for VLBI data processing and soeware for compu/ng the orbital elements and future coordinates of the observed objects (debris). Ø Collabora7on with Radio physical Research Ins7tute, Nizhnij Novgorod, Russia and LFVN
19 Low Frequency VLBI Network Project (LFVN) Radio Telescopes: Ø Bear Lakes RT- 64 Ø Pushchino RT- 22 Ø Zimenki RT- 15 Ø St. Pustyn RT- 14 (Russia) Ø Evpatoria RT- 70 Ø Simeiz RT- 22 (Ukraine) Ø Noto RT- 32 Ø Medicina RT- 32 (Italy), Ø Urumqi RT- 25 (China), Ø Ventspils RT- 32 (Latvia). Frequencies: Ø 92 cm, 18 cm, 6 cm. Recording systems: Ø TN16, MK- 2, NRTV, MK- V. Ac/vi/es: Ø Inves7ga7ons of solar wind, solar spikes, AGN, OH- masers, ac7ve stars and radar research of Earth group planets, close asteroids and space debris objects.
20 VLBI radar method VLBI- radar method since 2001 is applied for determina7on of path of planets, asteroids and space debris objects (disabled satellites, rocket stages, etc.). The VLBI radar method represents the combina7on of the "classic" radar and VLBI. As a result, such combina7on gives the instruments, which can measure the range, radial velocity (like radar) and the angle and angular velocity (like VLBI). The main task of the experiments is the receiving of informa7on about object s coordinates and velocity on measurements of 7me delay and Doppler frequency. Planet radar RT- 70 (Evpatoria, Ukraine)
21 VLBI radar method During VLBI radar experiment the planet radar irradiates the space object, and the array of radio telescopes receives the reflected from object signal in VLBI mode. VIRAC took part in radar VLBI experiments since 2007 on LFVN, including: planet radar in Evpatoria, Ukraine: RT- 70, F=5 GHz, P= kw (con7nuous regime of emission); VLBI- sites: RT- 64 (Kalyazin, Russia), RT- 22 (Simeiz, Ukraine), RT- 32 (Noto, Italy), RT- 32 (Medicina, Italy), RT- 25 (Urumqi, China) and RT- 32 (Irbene, Latvia) Data processing centre Ventspils University College and NIRFI- 3 (Nizhnij Novgorod, Russia) Data Processing Center Transmitting antenna Receiving antennas
22 VLBR10.1, of April of 2012 Experiment Debris2012 Transmission mode (Evpatoria locator on RT- 70, Ukraine): Monochroma7c radia7on and linear modulated radia7on; central frequency of MHz, polariza7on RCP, power P= kw Observa7onal mode: Bandwidth: 500 KHz Central frequency: MHz Polariza7on: RCP and LCP Recording systems: Mark- V (Medicina, Urumqi, Simeiz, Ventspils), TN- 16, Mark- II (Ventspils)
23 SCANS: Start Stop Source date = 2012APR17 day number =108 06:00:00-06:10: :15:00-06:35: _radar 06:50:00-07:00:00 3C :05:00-07:20: _radar 07:40:00-07:50: :55:00-08:15: _radar date = 2012APR18 day number =109 17:00:00-17:10:00 4C :15:00-17:40: _radar 17:50:00-18:00:00 3C237 18:05:00-18:30: _radar 18:40:00-18:50:00 3C273B 18:55:00-19:20: _radar Experiment Debris2012 date = 2012APR19 day number =110 16:40:00-16:50:00 OK290 16:55:00-17:20: _radar 17:30:00-17:40: :45:00-18:10: _radar 18:20:00-18:30:00 3C273B 18:35:00-19:00: _radar 19:10:00-19:20:00 3C273B 19:25:00-19:50: _radar date = 2012APR20 day number =111 10:25:00-10:35:00 Moon 11:00:00-11:10:00 3C120 11:15:00-11:35: _radar 11:50:00-12:00: :05:00-12:25: _radar 12:40:00-12:50: :55:00-13:15: _2_radar 13:30:00-13:40: :45:00-14:05: _radar 14:20:00-14:30:00 4C :35:00-14:55: _radar
24 Experiment Debris2012
25 VLBI observa/ons of naviga/on satellites, 6 10 apr 2012 Frequency: 18 cm; One circular polarization; Data acquisition system: TN-16; DBBC + Mark5b; Antennas: Irbene RT-32; NIRFI, RT 2 m; NIRFI, horn 0.2 m;
26 VLBI observa/ons of naviga/on satellites, 6 10 apr 2012 New 18 cm receiver made in IRI VIRAC; Able to observe NAVSTAR GPS and GLONASS navigation satellites; Tested in VLBI regime with two NIRFI receivers. First light: 9 Apr 2012 J
27 Conclusions RT-32 VLBI station? YES J 5 GHz: EVN and LFVN; 1.6 GHz: EVN (future), tested in the NIRFI Irbene baseline. This is just a beginning. ~5 MEuro infrastructure upgrade: cryogenic receivers and data acquisition system; antenna control system; antenna support structure; primary and secondary mirrors surface calibration;
28
29 Thank you for agen/on.
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