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Old 07-22-2011, 05:32 PM   #16
SiberianTiger
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Today, a reflector unfolding operation was planned for. Despite many attempts made during uplink awailability window between 9 am and 6 pm MSK, none was successful. New series of unfolding attempts are planned for tomorrow.

That's an unofficial information.
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Old 07-22-2011, 07:55 PM   #17
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http://ria.ru/science/20110722/405765462.html

It rather opened, but could not be latched in open position.
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Old 07-23-2011, 08:24 AM   #18
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Hoooray!!!

http://www.federalspace.ru/main.php?id=2&nid=12017

Quote:
Spectrum-R Mirror Deployed
:: 23.07.2011

Orbital operations with Russian astrophysical observatory Spectrum-R which had been launched from Baikonur on July 18 continue successfully.
Radiotelescope mirror has been successfully deployed on July 23.
According to telemetry data obtained in Lavochkin R&D, the scheduled operations are carried out in full scope.
Spectrum-R, developed under Radioastron project in the framework of Russian Federal Space Program, is intended to study the Universe. The aim of the mission is to use the space telescope to conduct interferometer observations in conjunction with the global ground radio telescope network in order to obtain images, coordinates, motions and evolution of angular structure of different radio emitting objects in the Universe. Scientists also expect to obtain more information about pulsars and interstellar plasma, black holes and neutron stars in the Milky Way. The spacecraft's operational lifetime will be no less than five years.
Spectrum-R was built by Roscosmos company Lavochkin R&D. Scientific payloads were developed by the Astro Space Center of Russian Academy of Sciences Lebedev Physical Institute, as well as by international partners.

Roscosmos PAO


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Old 07-23-2011, 08:48 AM   #20
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======================
RadioAstron Newsletter
Number 4
July 23, 2011
======================


The Space Radio Telescope is unfolded!

It is difficult to express how happy we are to report that
the space radio telescope on board the Spectr-R space craft
was successfully unfolded today.
This is an extremely important milestone for the mission
and a significant achievement which resulted from a hard
work of hundreds of people in Russia during many years.
Thank you and congratulations!



With best regards,
Nikolai Kardashev ([email protected])
Yuri Kovalev ([email protected])
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Old 07-26-2011, 09:41 PM   #21
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Dear colleagues,

Lavochkin association has prepared a couple of nice Radioastron related
movies.
The first one will be most appreciated by Russians since it has Russian
comments. It discusses different aspects of the mission:
ftp://ftp.asc.rssi.ru/Spektr-R/movies/1.mpg 209MB download

The second one shows the space radio telescope deployment.
Almost like it has happened on July 22-23 in space.
ftp://ftp.asc.rssi.ru/Spektr-R/movies/2.mpg 215MB fownload

Enjoy.

Yuri Kovalev

Last edited by Notebook; 07-26-2011 at 09:51 PM.
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Old 08-04-2011, 08:24 PM   #22
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RIA Novosti cites Alexander Kovalenko from Puschino radioobservatory that the first attempt to test telemetry and command channel failed today because the craft was too cold (-20 deg C instead of -15 deg C). The next attempt to get TTC working from Puschino is scheduled for August 13.
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Old 08-16-2011, 07:37 PM   #23
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High-bandwidth channel tested, all systems nominal.
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Old 08-25-2011, 01:30 PM   #24
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Update from Roskosmos: http://www.roscosmos.ru/main.php?id=2&nid=17773&lang=ru

NPO after S.A.Aizikovich ehhrm, sorry Lavochkin, is debugging "Plazma-F", and has rotated the spacecraft to do away with unexpected thermal problems (uneven heating, or so they say).

Quote:
В НПО им. С.А.Лавочкина специалисты объединения продолжают летные испытания космического радиотелескопа (КРТ) Спектр-Р в соответствии с запланированной программой. Бортовые системы функционируют штатно, наземный комплекс управления осуществляет связь с КА в обычном режиме.

При прохождении очередного перигея в зоне возможной связи станции слежения в Пущино с космическим аппаратом был успешно осуществлен прием тестового сигнала передатчиков двух каналов ВИРК (передача научной информации и синхронизация работы борта и Земли).

Кроме того, продолжаются работы по отладке режима работы комплекса Плазма-Ф, плановые проверки режимов функционирования бортового комплекса управления.

В целях изучения влияния положения Солнца относительно осей космического аппарата на распределение температур по поверхности Спектра осуществлена переориентация спутника.

Продолжается работа по проверке режимов функционирования КРТ и подготовке к его работе в очередном перицентре.
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Old 08-25-2011, 02:07 PM   #25
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Quote:
This is dramatic:
Wow, nice vid ! Since when Roscosmos is doing movies like that ?

The Antonov landing with the light music behind was especially fun
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Old 09-17-2011, 08:03 AM   #26
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======================
RadioAstron Newsletter
Number 5
September 16, 2011
======================
Russian version of the Newsletter can be found here:
http://www.asc.rssi.ru/radioastron/n.../newsl_rus.pdf



Spectr-R in-orbit tests continue


Many things have happened since the previous Newsletter
which reported on the space radio telescope deployment.
Science payload and survice systems of Spectr-R were
successfully turned on. Technical details can be found here:
http://www.asc.rssi.ru/radioastron/news/news.html
In particular:
- The H-maser (atomic clock) was turned on and internal test
has shown that the clock works properly, its stability
is reported to be within the specs.
- Tests of "VIRK", the system which includes high-gain 1.5-m
diameter antennae and is used to contact with the tracking station
in Pushchino, continue. The so-called "open loop", the tone signal
at 8 GHz, was successfully detected in Pushchino and is being used
to perform Doppler measurements of the orbit parameters.
The 15 GHz tone signal was also successfully detected.
- Today, the first system temperature measurements were
performed for the Australian-made 18 cm astronomical receiver
while the space telescope was pointed on a cold sky;
the system temperature is estimated to be about 42 K
which is close to receiver's specifications.


Plans for the near future:
- VIRK pointing correction measurements and 15 GHz data link tests,
- performance measurements for all the other astronomical receivers
of the 92, 6, and 1.3 cm bands,
- Cassiopea A first light single-dish radio astronomical observations
including space radio telescope efficiency measurements.


With best regards,
Nikolai Kardashev ([email protected])
Yuri Kovalev ([email protected])

N.
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Old 11-03-2011, 07:45 PM   #27
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======================
Astro Space Center
RadioAstron Newsletter
Number 8
November 3, 2011
======================
Russian version of the Newsletter can be found here:
http://www.asc.rssi.ru/radioastron/news/news_ru.pdf


Space radio telescope tests in 6 and 1.35 cm bands

Many observations of space objects have happened by Spektr-R in October 2011 in 6 and 1.35 cm bands. Cassiopeia A, Moon, Jupiter, as well as the Crab nebulae were observed in a scanning mode of a single radio telescopes. Radio signals from all these objects were successfully detected. The space radio telescope pointing has proven to be very good and stable. Tests at these two bands continue in order to achieve high quality telescope calibration information.


First maser observations by the space radio telescope

First single dish observations of a space object have happened on October 29 and 30 when scientific and telemetry data were transmitted to the ground through the wide band 15 GHz data link between Spektr-R and Pushchino tracking station. This mode of observations and recording is similar to the one which will be used for interferometric experiments. A maser source W3(OH) was observed in the OH (1665 MHz) and H20 (22232 MHz) lines. They correspond to 18 and 1.35 cm RadioAstron bands. The measurememnts have happened at the Spektr-R separation from the Earth by 60 and 200 thousand kilometers.
See attached figure with the spectra produced by the RadioAstron in-orbit checkout team of Astro Space Center.

W3(OH) is located about two kiloparsec away from the Earth in our Galaxy in a proto-stellar region. Radio emission from the object was collected by the 10-m space radio dish, digitized and formatted on-board, sent by the high-gain 1.5-m antenna to the Pushchino tracking station, decoded and recorded on the RadioAstron data recorder at the tracking station. Recorded data were transmitted to Astro Space Center over a dedicated Internet line. Data analysis in Astro Space Center confirmed the maser lines in both bands in left and right circular polarizations at expected frequencies, with expected amplitude and shape. As a result, this experiment has confirmed the full functionality of the space segment of interferometer.


First RadioAstron experiments in a mode of Space-Earth interferometer, so called fringe search, are planned to start in the second half of November 2011.


With best regards,
Nikolai Kardashev ([email protected])
Yuri Kovalev ([email protected])

There is also a pdf file in this newsletter, can't attach here, this relates to the axis.

October 30, 2011, 10:44 UTC
In-orbit Radioastron 1.35 cm receiver spectral response on the W3(OH) maser, water vapor (H2O) line component at -50 km/sec: right (top) and left (bottom) circular polarization. Amplitude is shown in arbitrary units.

N.
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Old 11-25-2011, 09:01 AM   #28
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The RadioAstron Newsletter # 9, November 24, 2011.

======================
Astro Space Center
RadioAstron Newsletter
Number 9
November 24, 2011
======================
Russian version of the Newsletter can be found here:
http://www.asc.rssi.ru/radioastron/news/news_ru.pdf

RadioAstron fringe search has started

First fringe search observations of the ground-space interferometer RadioAstron have started on November 15 and 23, 2011. Both sessions have happened successfuly, observations were made on the 18 cm band. Scientific data from the space radio telescope were successfully transmitted to and recorded by the Pushchino tracking station. The observations were supported by the following ground VLBI stations: three 32-m telescopes of the Russian VLBI network Kvazar in Svetloe, Zelenchukskaya, Badary, 70-m radio telescope in Evpatoria (Ukraine), 64-m Usuda (Japan), 100-m Effelsberg (Germany), 100-m GBT (USA). Quick data quality check has confirmed that the data are suitable for the fringe search. The data analysis center in Astro Space Center of Lebedev has started the interferometric fringe search.

The first RadioAstron fringe test on November 15 had been also supported by two EVN telescopes, Metsahovi 14 m (Finland) and Onsala 20 m (Sweden) as a part of the JIVE-led Planetary Radio Interferometry and Doppler Experiment (PRIDE). These PRIDE observations of the Spektr-R tone signal at 8.4 GHz will provide additional Doppler measurements for orbit determination feed
into the data correlation process.

The RadioAstron team plans first fringe search experiments at the 6 cm band to happen in December 2011. First successful distance measurements with a laser ranger Laser ranging is one of several methods being used to reconstruct the Spektr-R orbit with high accuracy required for a proper functioning of the ground-space radio interferometer.

First successful laser ranging of Spektr-R has happened on November 15, 2011, from 5:30 to 6:30 Moscow time. The ranging was performed by the Observatoire de la Cote d'Azur (Grasse, France) as part of the International Laser Ranging Service. The distance measurements were done continuously during 35 minutes resulting in 875 independent measurements. The distance to the space craft has changed during this period of time from 65 to 70
thousand kilometers. Refelected signal was of a very high quality. The error of measurements is about or less than 10 cm.

Results are available from:
ftp://cddis.gsfc.nasa.gov/slr/data/n...dioastro/2011/

Pulsar PSR0329+54 and water maser Orion KL As part of the ongoing in-orbit checkout activities, the bright pulsar PSR0329+54 was observed on November 7 at 316 MHz while the water maser in the Orion KL region -- on November 8, 2011, at 22 GHz. The space radio telescope scientific data were
transmitted to the ground using the wide band data link to the Pushschino tracking station. Positive data processing results can be found on the attached plots indicating a good overall performance of the system.

With best regards,
Nikolai Kardashev ([email protected])
Yuri Kovalev ([email protected])
To subscribe or un-subscribe to the Newsletter, use:
http://asc-lebedev.ru/index2.php?engdep=22



Results of RadioAstron space radio telescope observations of the water maser in Orion KL
region, right circular polarization, 22 GHz. The high narrow peaks correspond to the pulse-
calibration signal. The amplitude is shown in arbitrary units.




Results of RadioAstron space radio telescope observations of the bright pulsar PSR0329+54 at
316 MHz. The pulsar pro le is generated by averaging 90 minutes of data. The amplitude is
shown in arbitrary units.
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Old 12-08-2011, 10:25 AM   #29
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======================
Astro Space Center
RadioAstron Newsletter
Number 10
December 8, 2011
======================
Russian version of the Newsletter can be found here: http://www.asc.rssi.ru/radioastron/news/news_ru.pdf


RadioAstron finds first interference fringes


We are delighted to report a successful detection of the first interference fringes -- a correlated signal on ground-to-space baselines -- by the RadioAstron team at the Astro Space Center of the Lebedev Physical Institure, Russian Academy of Sciences. The fringes were found between the space radio telescope, Spektr-R, and the following ground based radio telescopes: The 32-m Russian "Quasar" antennas at Svetloe, Zelenchukskaya, and Badary of the Institute of Applied Astronomy, Russian Academy of Sciences, the 64-m Ukranian antenna at Evpatoria, the State Space Agency of Ukraine, and the Max-Planck-Institute for Radio Astronomy 100-m antenna at Effelsberg, Germany. The observations of the quasar 0212+735 were made on November 15, 2011 at 18 cm wavelength. The attached picture shows the clear detection of the interference fringes on the baseline between Effelsberg and the space radio telescope on a delay-fringe frequency plot.

http://i89.photobucket.com/albums/k2...4/Astron_1.jpg


The quasar 0212+735 was selected as a target by the Radioastron team on the basis of a preliminary determination of its very compact structure and high surface brightness by recent observations using the NRAO Very Long Baseline Array in the U.S.

The successful detection of interference fringes demonstrates the overall excellent status of the complex system and reflects the birth of the new international ground-to-space very long baseline interferometer, RadioAstron.

A search for fringes at other frequency bands and at longer interferometer baselines will continue until the end of January 2012, and will be followed by an "Early Science" program on quasars, AGN, pulsars, and cosmic masers. The Astro Space Center will also continue to perform in-orbit tests together with the Lavochkin Association including an effort to improve the quality of scientific data link from the space radio telescope to the ground through the Pushchino tracking station.

On behalf of the Astro Space Center, we would like to congratulate and thank the Lavochkin Association as well as the many other institutions in Russia, Ukraine, and other countries on their long lasting effort which resulted in this milestone result!


With best regards,
Nikolai Kardashev ([email protected])
Yuri Kovalev ([email protected])

N.

Last edited by Notebook; 12-08-2011 at 11:13 AM.
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Old 12-13-2011, 03:08 PM   #30
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http://ria.ru/science/20111213/515799083.html

Radioastron observatory has begun its scientific program one and half months ahead of the expected time, said a Yuri Kovalev, researcher from Lebedev Physical Institute (PhIAN).

Quote:
Having gained a success with observations in ground-to-space correlation mode at 6 and 18 centimetres wavelengths, we have saved much time. We are launching an initial scientific observations at the already tried wavelengths.
According to him, the first real target will be
BL Lacertae BL Lacertae
extragalactical source, discovered in 1929 by German astronomer Cuno Hoffmeister who believed it was an unusual variable star.

Quote:
We have picked observations time in such a way that we'll have 5-days long slot, from 10th to 14th of December. This will help us to study this object in different resolutions and get very detailed information on its radiation.
Kovalev also announced, that in the next year, applicants from any country will have a chance to submit proposals of their observations to be done with Radioastron, given they pass a necessary set of requirements.
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