Венера-Экспресс launch to Venus : re-using Mars Express

[Имxотеп]

2 новые картинки



VIRTIS ,  южный вихрь, 1.7 мкм



Облака в пограничной зоне между двойным вихрем и остальной циркуляцией. 2.3 мкм

Снимки сделаны 22 и 29 июля с расстояния 65000 км.

[Имxотеп]

пара новых снимков к годовщине запуска Venus Express





опять южный полюс. 1.7 мкм,  VIRTIS. На втором снимке видно образование периодической волнообразной структуры. Причины этого пока непонятны, но явление весьма распространено и встречается не только у полюса , но и в умеренных широтах.


Крупная анимация (4.1 Mb)

Анимация южного вихря по снимкам, сделанным 29 июля.  Композитное изображение составлено из снимков в нескольких диапазонах, что позволяет отобразить вихрь в интервале высот 60-70 км, практически 3d

[Имxотеп]

температурные карты Венеры (слева), полученные по анализу ее теплового излучения  в окнах прозрачности (методику см тут).  Справа - прогнозируемые температуры исходя из топографии по данным Магеллана. Стрелками указаны некоторые перспективные области, где в настоящее время могут действовать вулканы. Прежде всего это высокогорья Themis Regio и Phoebe Regio, отдельные горы (Mielikki Mons). Ничего подозрительного пока не обнаружено.

[ESA Vega]

One year at Venus, and going strong

http://www.esa.int/SPECIALS/Venus_Express/SEM26GLJC0F_0.html

[ESA Vega]

Venus Express' infrared camera goes filming
 
7 May 2007

http://www.esa.int/SPECIALS/Venus_Express/SEMQKVU681F_1.html


another news item


Венера и Марс стали жертвами климатических катастроф
http://www.spacenews.ru/spacenews/live/full_news.asp?id=20468
    Климат этих планет разительно отличается от климата Земли. Дэвид Гринспун высказал предположение, что климат на Венере и Марсе был похож на земной, но затем изменился. Причиной изменения климата Венеры стал парниковый эффект, который привел в повышению температуры на поверхности планеты. В то время как Марс растерял атмосферу и остыл.
   Изучая данные, полученные со спутников Европейского космического агентства (ESA) Венера-Экспресс (Venus Express) и Марс-Экспресс (Mars Express) климатологи получают ценную информацию. Ученые считают, что данные о климате Венеры и Марса помогут уточнить компьютерные модели климата Земли, поскольку изменения климата на разных планетах подчиняются одним и тем же законам природы.

[ronatu]

Дэвид Гринспун высказал предположение, что климат на Венере и Марсе был похож на земной, но затем изменился. Причиной изменения климата Венеры стал парниковый эффект, который привел в повышению температуры на поверхности планеты. В то время как Марс растерял атмосферу и остыл...

Это на в ОХУМОРУ поскольку таким предположениям 100 лет в обед...

[КашА]

Согласен с Ронату.  :lol:
Был очень удивлён, с каким пафосом описано данное "открытие"  :shock:

[ESA Vega]

500 days at Venus, and the surprises keep coming
http://www.esa.int/esaCP/SEMNOCMPQ5F_index_1.html

[ESA Vega]

Happy second birthday to Venus Express

http://planetary.org/blog/article/00001229/

[В А Д И М]

Happy second birthday to Venus Express

http://planetary.org/blog/article/00001229/

а где результаты?

[Chilik]

Был очень удивлён, с каким пафосом описано данное "открытие"  :shock:

Используя житейскую мудрость, предположу, что великое открытие могли сделать и журналисты, акцентировав внимание на одной из проходных фраз учёного.

[ESA Vega]

а где результаты?

Results are in cold storage

ESA is not NASA

ESA = PublicRelations disaster

[В А Д И М]

а где результаты?

Results are in cold storage

ESA is not NASA

ESA = PublicRelations disaster

Вот так? ну тогда  цветы и подарки отменяются  

[ESA Vega]

some PDF Publications

Spacecraft and Payload Data Handling
http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41521#

The general objective of ASPERA-4: Analyser of Space Plasmas and Energetic
http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41518

PFS: The Planetary Fourier Spectrometer
http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41529#

The Ground Segment and Mission Operations
http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41523

Venus Atmospheric, Ionospheric, Surface and Interplanetary Radio- Wave Propagation Studies with the VeRA Radio Science Experiment
http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41535

MAG: The Fluxgate Magnetometer of Venus Express
http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41527

SPICAV: Spectroscopy for the Investigation of the Characteristics of
http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41533#

dot PDF files

[ronatu]

Happy second birthday to Venus Express

http://planetary.org/blog/article/00001229/

а где результаты?

9 November 2007
Venus Express, launched two years ago today, has been adding much to our knowledge of Earth's twin. The satellite has recently peeked through the planet's thick veil of clouds and sent new images of its surface.
 
Venus' surface is a scorching 735 K, or 462°C, and emits a lot of infrared radiation. All of this radiation is scattered numerous times by its thick 25 km-layer of clouds before it escapes into space. This gives Venus a weak glow, but also makes it hard for an orbiting satellite to get a true picture of the planet's countenance.
Despite the thick haze, infrared light, invisible to the naked eye, can escape at certain wavelengths through spectral windows. ESA's Venus Express carries the Venus Monitoring Camera (VMC), which has used one of the spectral windows to see through the haze and map the surface of our neighbour on its night side.  

[ronatu]

The region mapped by Venus Express' Venus Monitoring Camera, VMC, is indicated on this Venus topographic map created with radar data from NASA's Magellan orbiter.
The area mapped by the VMC includes some of the most typical geological units on Venus. Beta Regio and Phoebe Regio represent tesserae – some of the oldest terrain on the planet. The radar on board Magellan radar detected anomalously high reflectivity of the tops of Rhea and Theia mountains, indicating the presence of conductive, semiconductive, ferroelectric or ferromagnetic materials.

Devana Chasma, the elongated feature connecting Beta Regio and Phoebe Regio, is a rift zone, resembling the East-African rift on Earth. Such rifts are expected to be the centres of current volcanic activity on Venus.

The surface mosaics are currently used to study variation of mineralogical composition and its correlation with topography and radar reflectivity. They are also used to search for ongoing volcanic activity – a few square-kilometre flows of hot lava can be detected in such images as bright spots.

[ronatu]

Venus' fickle atmosphere
 
Among many other findings that have surprised scientists, Venus' atmosphere seems extremely fickle.

Recent observations with the Visible and Near-Infrared Mapping Spectrometer (VIRTIS), have shown that Venus' atmospheric structure changes quite rapidly, from day to day.

Giuseppe Piccioni, co-Principal Investigator for VIRTIS on board Venus Express says, "It seems that the mid latitudes form a sort of transition region with mostly laminar flow. Moving equatorward, there is more convective flow in the atmosphere, whereas the polar region is dominated by huge vortices." Laminar flow is where the fluid (gas or liquid) travels smoothly or in regular paths. This is in contrast to turbulent flow, in which the fluid undergoes irregular fluctuations and mixing.

The meteorology of the planet, including its deep atmosphere is highly variable. "Although the configuration of the flow is similar, the intensity of turbulence changes significantly from one orbit to the next," adds Pierre Drossart, co-Principal Investigator for VIRTIS.

The polar region or the 'black hole' seen in the images is where the polar dipole dominates. The polar dipole is the name given to a giant double-vortex, each of which is about 2000 km across, similar to the eye of a hurricane. The double-vortex has been seen at both the north and south poles, rotating in opposite directions (clockwise at the north pole and counter-clockwise at the south pole). Observations with Venus Express show that the vortex at the south pole also changes its shape rapidly, from one orbit to the next.

[ronatu]

What happened to Venus Express... The Observer updated

Robin McKie
Sunday November 25, 2007
The Observer


For the past two years, Venus Express - a spacecraft built by European scientists and engineers - has been orbiting the Earth's sister planet. This week, astronomers will gather in Paris to reveal what the probe has told them about this strange world.

Despite the powerful solar radiation that has battered Venus Express, the craft has operated flawlessly since its launch in November 2005.

Scientists already knew Venus was a strange world, afflicted with a crushing dense atmosphere, surface temperatures that would melt lead and clouds laced with sulphuric acid. And the surprises have continued to emerge from the data sent back the European Space Agency's spacecraft. In particular, researchers have found that Venus's atmosphere is extremely fickle and changes its structure from day to day.

Images sent back by Venus Express show that, at both poles, there is a giant double-vortex, each 2000 km across, similar to the eye of a hurricane.

The double-vortices rotate in opposite directions - clockwise at the north pole, anti-clockwise at the south. Venus Express has also found the southern vortex changes its shape rapidly....

http://www.guardian.co.uk/space/article/0,,2216734,00.html

[ssb]

Бесплатный сыр от журнала "Природа" :)

VENUS EXPRESS MISSION REPORTS

published in Nature 450 (29 November 2007)
http://www.nature.com/nature/focus/venusexpress/index.html


The girl next door
Eric Hand
http://www.nature.com/news/2007/071128/pdf/450606a.pdf


Venus: Express dispatches
Andrew P. Ingersoll.
http://www.nature.com/nature/journal/v450/n7170/pdf/450617a.pdf


Venus as a more Earth-like planet
H

[ESA Vega]

Christmas greetings from Venus – with a new educational film
http://www.esa.int/SPECIALS/Venus_Express/SEM8F1NJCAF_0.html
A breath of Venus' - an educational film