Venus Climate Orbiter "AKATSUKI"(PLANET-C,"Акацуки"), IKAROS, UNITEC-1, WASEDA-SAT2, Negai-Star, KSAT – H-2A – 21.05.2010 01:58 ЛМВ

[Salo]

Конечно. :wink:
Путаете с серией Мю.

[Salo]

http://forum.nasaspaceflight.com/index.php?topic=18950.msg594183#msg594183

'First Light' images taken of Earth with Akatsuki's LIR, UVI and IR1 instruments

http://www.stp.isas.jaxa.jp/venus/

LIR:


UVI и IR1:

[Имxотеп]

LIR:

Вероятно стоит пояснить, что снимок сделан в диапазоне 8-12 мкм и представляет собой карту теплового излучения атмосферы Земли.



Темные  участки соотвествуют областям с низкой температурой типа Антарктиды или верхним слоям облачности.

[Salo]

http://forum.nasaspaceflight.com/index.php?topic=18950.msg595791#msg595791

Re: LIVE: H-IIA - Akatsuki - Venus Climate Orbiter (PLANET-C) - May 20, 2010
« Reply #217 on: Today at 10:45 AM »   

Contact was lost three small satellite, UNITEC-1, KSAT and Wasedasat-2.
These satellites operations are resopnsible individual team. JAXA has not support the operations.
UNITEC-1 has contact after launch, but lost the contact after that.
Other two small satellites were not recieved telemetry after launch.

AKATSUKI and IKAROS are so far good shape.

[Имxотеп]

Блог IKAROS'a сообщает об успешном выполнении подготовительных операций перед раскрытием паруса: отделены грузики на концах 4 лепестков, аппарат ориентирован на солнце и закручен до 15 оборотов в минуту (rpm).

Общая последовательность действий выглядит следующим образом:



1) Отделение от РН, аппарат вращается со скоростью 5 rpm
2) Двигатели ориентации снижают закрутку до 2 rpm
3) Высвобождение стартовых cтопоров
4) Закрутка аппарата до 20 rpm
5) Первый этап развертывания паруса,закрутка уменьшается до 5 rpm
6) Второй этап развертывания паруса, закрутка уменьшается до 2 rpm
7) Двигатели ориентации шлифуют остаточные возмущения (2 rpm -> 1 rpm)

Сейчас мы где-то в районе п.4.

[Имxотеп]

Аппарат раскручен до 25 rpm, протестированы 4 широкоугольные камеры, с помощью которых будет отслеживаться ракрытие паруса. Сейчас на снимках видны только 4 грузика (tip mass).

[Имxотеп]

Сегодня  начался первый этап раскрытия паруса - 4 лепестка развернуты и вытянуты крестом, закрутка уменьшалась до 8 rpm.  Ждем  раскрытия пленки.

[Космос-3794]

Ждем  раскрытия пленки.

Отложено по крайней  мере до вторника из-за необходимости уточненного анализа телеметрических данных. В частности неопрделенности остаются в симметричности процесса полного раскрытия конструкции:

http://www.planetary.org/blog/article/00002528/[/quote]

[Брабонт]

Small Solar Power Sail Demonstrator 'IKAROS' Successful Image Shooting by Separation Camera

The small solar power sail demonstrator "IKAROS," which expanded its solar sail on June 10, released its separation camera and took images of the deployed solar sail successfully.

[integrall]

DCAM2's view of IKAROS
A 32-frame animation from the deployable camera DCAM2 on IKAROS. The camera rotated as it receded, producing the apparent spin of the sail.[/size] Credit: JAXA

http://planetary.org/blog  

[Salo]

http://www.youtube.com/watch?v=2ZsrTID2mCs&feature=player_embedded

[Брабонт]

Orbit Control Maneuver Result of the Venus Climate Orbiter 'AKATSUKI'

As a result, we have successfully performed on-orbit verification of the ceramic thruster, made of silicon nitride (Si3N4) for the first time in the world. The thruster was newly developed in Japan.

[Имxотеп]

As a result, we have successfully performed on-orbit verification of the ceramic thruster, made of silicon nitride (Si3N4) for the first time in the world. The thruster was newly developed in Japan.

Собственно вот:



Но здесь они не первые. Американцы уже испытывали Si3N4 камеры и сопла для водородно-кислородных двигателей.

[Salo]

http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=18950.0;attach=242930

[sol]

Что там нового?

[Salo]

http://www.rian.ru/science/20101118/297883901.html

Японский зонд "Акацуки" выйдет на орбиту Венеры 7 декабря[/size]
16:16 18/11/2010

МОСКВА, 18 ноя - РИА Новости. Японская межпланетная станция "Акацуки" (Akatsuki / Planet-C) выйдет к месту своего назначения - на орбиту вокруг Венеры - после 7 декабря, сообщает в четверг японское аэрокосмическое агентство JAXA.

Как говорится в сообщении, специалисты агентства запланировали включить двигатель орбитального маневрирования для выхода на орбиту Венеры 7 декабря в 08.49 по токийскому времени (02.49 мск). Двигатель проработает 12 минут, и к 21.00 того же дня, после ряда дополнительных маневров, группа управления полетом зода сможет определить параметры его новой орбиты.

Орбитальный зонд "Акацуки", запущенный в космос 21 мая с японского космодрома Танегасима в паре с зондом "Икарос" (Icaros), в течение двух лет будет изучать атмосферу Венеры. В частности, он исследует загадочное явление суперротации - чрезвычайно быстрого вращения слоя атмосферы на высоте около 60 километров, который движется, обгоняя собственное вращение планеты.

Кроме того, аппарат будет получать данные о климатических условий на планете, свойствах ее поверхности, характеристиках облаков Венеры, в числе которых есть состоящие из капель серной кислоты.

На борту аппарата, в частности, находится несколько инфракрасных камер для разных диапазонов, прибор для измерения ультрафиолетового излучения, устройства для фиксации молний и разных типов электростатического свечения.

[Брабонт]

AKATSUKI ready for orbit injection

The Venus Climate Orbiter "AKATSUKI" shifted its attitude at 7:50 a.m. on December 6 to be ready for Venus orbit insertion at 8:49 a.m. on December 7. On the 7th, we will hold some events to support the AKATSUKI orbit injection. We plan to run the "Venus arrival live broadcast" featuring the AKTSUKI and show the scene of the AKATSUKI Control Room" at a public viewing site. Please come and join the injection moment. (* All time and dates are Japan Standard Time.)

JST = UTC + 9

[Salo]

Т.е. ДМВ+6.
Ждем в 02:49 ДМВ.

[Salo]

http://forum.nasaspaceflight.com/index.php?topic=18950.msg667157#msg667157

New Tweet from @Akatsuki_JAXA on Twitter: [More] Sagamihara operation room about 28 minutes at 10 December 07, 2010 (Japan time), and received a wave from the Akatsuki. Currently, we went to check the state of the satellite.

In other words:

"As of 7 Dec 2010 1028 JST received signal from Akatsuki. We are attempting to verify its position (attitude?)."

Contact was lost more than 1 hour
It was far longer than predicted (25min).
But, now contact was established

NHK report the Akatsuki has antenna problem. Now troubleshoting using backup strings.

Not hearing good news on this site...

http://translate.googleusercontent.com/translate_c?hl=de&ie=UTF-8&sl=ja&tl=en&u=http://twitter.com/koumeiShibata&prev=_t&rurl=translate.google.com&usg=ALkJrhhNrw7BvstntBEzJHc7alk-6Pm9gA

--Akatsuki ending press conference. No announcement of the meeting until 22:00 and there are reports point out trouble, and it brought back to confirm. It is going to be a long war.

--Akatsuki is unknown or has failed. Gain antenna was in use until now.

[Salo]

http://mdn.mainichi.jp/mdnnews/news/20101207p2g00m0dm020000c.html

Japanese space probe Akatsuki set to enter Venus' orbit[/size]


An artist's rendering of Akatsuki arriving at Venus. (By Akihiro Ikeshita)

TOKYO (Kyodo) -- Japanese space probe Akatsuki was set Tuesday morning to go into orbit around Venus, reversing its engine in the final step before entering the planet's gravitational field, Japanese space agency officials said.

The officials at the Japan Aerospace Exploration Agency, known as JAXA, said they had received data showing that Akatsuki, now about 550 kilometers above Venus, had begun reversing the engine to slow down as scheduled shortly before 9 a.m. Tuesday Japan time.

The slowdown is expected to subject the probe to Venus' gravitational field, causing it to shortly enter into orbit, but JAXA said it would not be able to confirm until Tuesday afternoon whether Akatsuki had indeed entered orbit.

It would be the first time for Japan to place a space probe into orbit around a planet other than Earth, fulfilling a goal of the country's space engineers after a failed attempt between 1998 and 2003 to place a probe into orbit around Mars.

The achievement is expected to come 200 days after a rocket carrying Akatsuki blasted off on May 21, during which time the probe traveled 520 million km to approach Venus.

There was anxiety in the JAXA control room in Sagamihara, Kanagawa Prefecture in the morning, following a brief loss of contact with the probe after confirming the start of the engine reversal.

According to JAXA, Akatsuki must reverse its engine for 12 minutes in order to enter orbit, with the probe having only one chance to do so, as a failed attempt would see it pass over Venus.

"Eleven years have passed since the start of the Akatsuki project. I'm in the biggest moment in my life as a researcher," said Naomoto Iwagami, a University of Tokyo associate professor in charge of the management of one of special cameras on board the probe, in the control room.

As it takes about three minutes and 30 seconds for a one-way transmission to reach Akatsuki, now located about 63 million km from Earth, the command to reverse the probe was programmed in advance.

Once the probe is successfully in orbit, it will adjust its position to eventually move into the targeted oval orbit circling the planet in 30 hours at altitudes of 550 to 80,000 km around Dec. 13.

It will then observe the atmosphere of the planet for over two years using instruments including ones to measure near-infrared rays and ultraviolet rays.

JAXA said shedding light on meteorological phenomena in Venus will help understand why Venus and Earth, the two planets most similar in size and distances from the sun, have very different environments. The study will also deepen understanding of Earth.

Akatsuki was developed at a cost of 25.2 billion yen for Japan's first planetary exploration mission since an unsuccessful stint by the Mars probe Nozomi, which was launched in 1998. JAXA in 2003 gave up trying to put Nozomi into the planet's orbit after a series of technical glitches.

JAXA officials said they put the lessons learned from Nozomi's failure into the development of Akatsuki.

(Mainichi Japan) December 7, 2010