Хаябуса !

Автор X, 19.05.2004 23:05:57

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X

Итокава стала вторым космическим телом с которого взлетала АМС(после Луны) и первым вне поля тяготения Земли, а также первым с которого стартовала два раза подряд!

Korel

Рано радоваться...

At 0:35 PM, professor Matokawa came into the press room. He looks a bit tense.

"At about 5km from Itokawa, we sent a command to fire the thruster to stop Hayabusa from getting farther away from Itokawa. However, the attitude of the probe is unstable now. Thrusters of X and Y axis are still periodically engaged. Because of it, the download operation of data is currently suspended.

We have to stop it. It is in the periodical thruster fire operation mode used for liftoff, but we are not still unable to disengage it. Either one of the thruster may be in trouble, but we are still under investigation. Now we sent a "stronger command" to stop the thruster. It will take 32 minutes to see the result.
If it is caused by the trouble in a thruster, we'll stop the thruster that is not working. If any one of thrusters stops, Hayabusa still use other thrusters to continue the operation.
Connection through Usuda will be lost at 2:50 PM. Until that time, our first priority will be attitude stabilization and data download. Project manager Kawaguchi is going to be fully engaged, and we may delay the press conference to 2:50 PM or later.

The decision of whether we got the sample will be based on the two criterias:
1) the equipment for bullet dischargement has worked or not
2) the probe has landed with right attidude according to attitude data from laser range finder.
The data for these criterias are not downloaded yet. We are going to stabilize the attitude, and if possible, finish the downloading before we lose the connection through Usuda."

Reporters asked several questions to confirm the exact time of events, followed by a lot of questions regarding if the bullet was successfully discharged, but professor Matokawa simply answered "We have not download the data yet. I wish you to wait for the completion of the downloading operation."

Meanwhile, more reporters, to cover the press conference scheduled at 1:00 PM, arrived at the Tokyo office, and started asking the same questions. Professor Matokawa was answering them patiently.

From Tokyo office came a women's voice, questioning "Will you tell us more visual detail of tha landing scene of the probe Hayakawa(?) to Itokawa?" Professor Matokawa answered "...Do you know the sequence of sample collection?" "No, I'm not sure..." The staff of Tokyo office cuts in with a comment "we will tell her the details."

Professor Matokawa leaves with a comment "sorry to keep you in such a suspence, but I will check the situation again and get back to you in half an hour."


Позднее:

The public streaming has finished, but pressroom is still getting the video from operation room.
We are seeing project manager Kawaguchi and members of operation team are gathering in the operation room. We can't see the detail because we are receiving no voice, but looks like they are having intense discussion. We see project manager Kawaguchi is making gestures to explain something.
We can't tell the extent of thruster problem from the video.

At 1:21 PM, operation team gathered around the console for sending command. Looks like then are going to send something to Hayabusa. No peak can be seen in the spectram analyzer display. The connection through hi-gain antenna seems to be lost.

At 1:37 AM:
Project manager Kawaguchi is standing on a side of command console, staff gathers and leaves there periodically. Looks like the discussion has ended and now it's time to send a command for recovery action. Professor Matokawa also came to the command console.

Connection through Usuda will be lost at 2:50 PM. The result of the commands sent before 2:18 PM will be seen through Usuda.

Korel

Brief digests from Matsuura's blog:

- One of the slaster was uncontrollable after the lift-off from Itokawa.
- They decided to transit to the safe mode, in which all the slasters stop.
- Hayabusa succeedingly entered to the safe mode "like a phoenix"
- In order to deal with the disorder in the slaster, data download was stopped temporally. So please wait for a while for data analysis results.
- The next press conference will be around 16:00pm in JST.

For details, please refer to the nicer translations by Mr. RogueEngineer in Matsuura's blog :-) http://smatsu.air-nifty.com/lbyd/

Korel

At 2:44 PM, professor Matokawa came into the pressroom.

"Hayabusa is in safe mode now. Seems like strong luck is with this probe. It's like we are seeing a phoenix... I have a message from project manager Kawaguchi, saying he wish to hold a press conference at 4 PM. As for the reservation of Deep Space Network, we got Nasa Madrid from 7:30 PM to 0:00 AM tonight."

Answer of previous question from the reporter:
"As for the concern of the collected sample getting away because of attitude change, the sample should be secured enough and unless there's extremely wild maneuver, you don't have to worry about that. Please give us a bit more time for the confirmation of touchdown."

X

Братцы, а ведь второй раз остановка трансляции на самом интересном месте - это симптом.
Я предлагал объяснение, не шутил. Дело в том, что НЕТ доказательств того, что у малых тел Солнечной системы есть собственное тяготение. Взгляните на статью-то! ссылка в конце стр.18 этой ветки.

Korel

Появился (судя по всему) текст пресс-конфренеции, но перевода пока нет...
Зато есть фотка, судя по которой, дела обстоят неплохо.

Petrovich

Японское космическое агентство JAXA сообщило, что межпланетный зонд Hayabusa сумел сесть на поверхность астероида Itokawa и, по всей вероятности, взял образцы грунта. Посадка состоялась 25 ноября в 22:07 UTC (26 ноября в 01:07 мск). Продолжительность пребывания зонда на поверхности астероида составила менее 1 минуты. Полученные пробы грунта планируется доставить на Землю для изучения :D  :D  :D
может мы те кого коснулся тот (еще) энтузиазм...

sol

ЦитироватьБратцы, а ведь второй раз остановка трансляции на самом интересном месте - это симптом.
Я предлагал объяснение, не шутил. Дело в том, что НЕТ доказательств того, что у малых тел Солнечной системы есть собственное тяготение. Взгляните на статью-то! ссылка в конце стр.18 этой ветки.

Да вы что! Совсем крыша съехала или в школе не учились? Извините за резкость - просто не иогу такое видеть!
Тяготением обладает ЛЮБАЯ масса хоть и пылинка, хоть и нейтрон.
Оно измерялось приборами, к примеру, между двумя стальными метровыми шарами, расположенными на расстоянии 1 см.
Формулу F=G(m1*m2/r>2) все помнят? !
Или это была шутка? Тогда - в УМОРУ!
Массаракш!

Жизнь - это падение в пропасть неизвестной глубины и заполненную туманом.

X

Цитировать
ЦитироватьБратцы, а ведь второй раз остановка трансляции на самом интересном месте - это симптом.
Я предлагал объяснение, не шутил. Дело в том, что НЕТ доказательств того, что у малых тел Солнечной системы есть собственное тяготение. Взгляните на статью-то! ссылка в конце стр.18 этой ветки.

Да вы что! Совсем крыша съехала или в школе не учились? Извините за резкость - просто не иогу такое видеть!
Тяготением обладает ЛЮБАЯ масса хоть и пылинка, хоть и нейтрон.
Оно измерялось приборами, к примеру, между двумя стальными метровыми шарами, расположенными на расстоянии 1 см.
Формулу F=G(m1*m2/r>2) все помнят? !
Или это была шутка? Тогда - в УМОРУ!

Это у него такая теория. Это действительно сразу в "УМОРУ", или, во всяком случае, куда-нибудь ... не сюда. Вот он какой: http://newfiz.narod.ru . Годится для чтения в трудную минуту жизни, когда нужно срочно что-нибудь весёлое для поднятия оптимизма.

Да, newfiz который Гришаев, какое отношение Вы имеете к ВНИИФТРИ? Кто Вы там? Поиск на их сайте Вас не находит.

mike

ЦитироватьБратцы, а ведь второй раз остановка трансляции на самом интересном месте - это симптом.
Я предлагал объяснение, не шутил. Дело в том, что НЕТ доказательств того, что у малых тел Солнечной системы есть собственное тяготение. Взгляните на статью-то! ссылка в конце стр.18 этой ветки.
Для тех кто в танке (это тот у которого нет гравитации): когда Hayabusa заходит на посадку, он поворачивается к поверхности астероида передом (низом), а к избушке, т.е. Земле какой-нибудь другой частью тела. Так как high gain antenna находится сзади (сверху), то в это время она на Землю не направлена и следовательно связь отсутствует.

N2H4

Небольшой оффтоп

График потребления валерьянки в процессе спуска :D  :D  :D

16:20 мск



19:00 мск



21:30 мск



10:00 мск


Korel

Machine translation of 4pm JST press conference:

"Press conference from 4pm JST:

The attendees are law Professor the Uesugi of one space scientific research Headquarters Chief, mission adviser Kawaguchi Junichi, project manager and Inoue, declaration by Professor Matogawa, Yasushi of chairmanship.

Details extending through main day from Kawaguchi last night are explained. 1st attempt on November 19th those which continue in time. 1st time did landing of touch down and 30 parts. 2nd as for time 1st with time you aimed toward the sampling which couldn't be completed. 1st later, Hayabusa with safe mode;, because it flew an extreme distance away from Itokawa , one week was spent, reset to the starting line with charge.
Yesterday afternoon around 10 o'clock, Hayabusa started the decent from 1km altitude. with optical navigation ;, it induces, 6 o'clock in the morning, moves to nose dive. Nose dive, the movement which is moved, alongside according to gravity to the Muses sea of Itokawa. When it enters into this phase, it basically cannot be controled from the ground. 6:52 in the morning, the temporary target marker discharge sequence is issued. When the target marker is a plural, because the guidance system is confused, it did not drop. From the fall middle, the previous target marker was observed.
The target marker originally uses for the guidance and control of cross direction, but not using the target marker, as a result of previous landing, because the self-confidence which can do induction was possible, it united the sequence of fall * landing with the prerequisite which basically does not use the target marker.
6:53 in the morning, the probe in 4 - the 5cm/s decent, at 35m altitude stopped utilizing the laser altimeter, started use of LDR , the attitude control which 7 o'clock in the morning with the altitude at 14m is learned in the hovering and topography did 2 minutes later. From telemetry transmission to beacon use.
After that, 7:03-05 in the morning, the laser range finder, from range measurement mode, was modified to sampler control mode. In order this time, to decrease guard and to seriously consider the continuation of the sequence parameter was group is. Therefore after this, without discharging the bullet it has reached the point where it is not the times when it ascends.

7:35 in the morning, two bullets (projector I Lu) it was verified that it had discharged.

8:35 in the morning, use in the Usuda bureau change. It starts data playback in Usuda.

11 o'clock in the morning the chemical propulsion engine (thruster system) the trouble which is thought as leak occurs before.
To tell the truth during approach falling the matter which is thought as sign occurred, but changing to backup system, it was operational.
Changing to high speed circuit from backup for the second time, when it does, the same trouble generated the injection for the second time. Because attitude deteriorates, the probe entered into safe mode with autonomous judgement. After that, operating the valve from the ground, it stops leak.

In the future, spending about 3 days, it rebuilds from safe mode. Making rebuilding prefer, after that it does data download.

As for the propellant leak quantity, there is no problem in immediate use. But, more and more it became harsh, you recognize use destined for return.

Concerning sampling, it meaning that leak occurs, until presently being able to grasp details it is not. But, being executed entirely normally being able to verify the sequence of the on-board computer is. Attitude of contact time, has presumed it had not deteriorated, but after details doing data download, it becomes."

Edited to clean up machine translation a little.

Взято из http://uplink.space.com/showflat.php?Cat=&Board=missions&Number=348809&page=0&view=collapsed&sb=5&o=0&fpart=27

Korel

Оттуда же

Machine translation of Q&A, above conference post edited to human translation.

"Question and answer

Everyday newspaper this time the bullet being discharged, it is good interpreting it took off?

Like the of Kawaguchi. Deformation of sampler horn detecting the both change of depth direction and cross direction, has become the design which discharges the bullet. According to the data detecting the deformation of cross direction, it discharged the bullet. The bullet in order to increase the sample picking quantity, 2 departure has discharged at 0.2 second interval. Landing is done with the 10cm/s, sampler horn the 10cm shrinks that time. Time to takeoff 1 second must say from there.

When everyday knowing newspaper landing, we would like to know the circumstances of feeling and the operational team. Kawaguchi you were overjoyed. Becoming the attitude which was learned in the earth's surface to land, you call rise, as aimed, because it operated, it is exultaion. Of course am I.

It seems the NHK wordy way, but as for the notion that where consecutive operation was done, being that sample picking was possible? You think Kawaguchi I myself was possible, but in order to say with conviction, circumstantial evidence is needed. Evidence (the data which is) we would like to wait. It means that the joint communication propellant has become harsh, but already can being try of one time? Because in Kawaguchi my myself present frame of mind, you think the sample, you could collect, you think whether it is not to be not necessary to fall once more. use team with, similar to think be when I conviction do be. If bullet discharge is verified with the download data, it probably means to enter into return preparation.

At Asahi National Broadcasting Co. present time as for the mission it is possible to saying it exceeded the mountain? Kawaguchi sample picking thought is the big mountain with. The returning/repeating road basically is the same as the outward trip. You refrain from the reent
ry of the interplanetary space lastly, but you feel it exceeded the mountain of eight tenths with this.

NHK considerably this time it was smooth, but is the point of the latest success probably where? You think there was the point in precision guaranty of Kawaguchi induction navigation. This time the last time aiming for the close place, it induced. Is the expectation which comes off with some last time, but we have become the reference whose previous landing is very good, you think whether it is not precision well to be able to induce the probe. It doesn't mean that it bears fruit that the various tools are prepared with the originality device? It probably is the result of stacking experience 2 with rehearsals plus 1 time and the touch down 2 time. As for present condition of monthly astronomical thruster what kind of ones? When it cannot restore, is there some kind of influence? Kawaguchi something occurs and under present conditions is not understood high, but leak occurs, it means that it was not flying through the monotonous outer space. Flying through the outer space, it will occur, but it is not. It probably is to be able to call the evidence which it gets off in the celestial body which is different. Furthermore it is not the case that it was verified in leak and perfection. So it means that the phenomenon which is thought occurs.

# The microphone it moves in Tokyo office.

It is Asahi newspaper verification. Circumstantial evidence in order for us to assume it could pick, what kind of ones? For example Kawaguchi it means that sampler horn of the probe becomes vertical vis-a-vis the surface. Being able to verify this it is with telemetry. After looking at the detailed data securely, we would like to speak the secure place. It means that you became skillful to Nikkei science induction navigation, but originally harsh challenge, more and more became harsh in breakdown of the wheel. Overcoming that, as for the notion that where, it achieved sample picking, the notion that where it was the more result in from the point, acquisition of technology? Like the of Kawaguchi it is. With the Q which means not being able to use the wheel, the disturbance by the thruster joins to the probe. With fall of rehearsal stage, considerably there was an error of big position and speed. On the basis of such experience, with the production it understood, could handle that favorably that it should do entirely. You can verify the operation of the ordnance of ո

Korel

А вот и нормальный перевод

"English translation of this entry
(press conference part only, no translation for Q and A session):

Here is a report of press conference at 4:00 PM.

People attended: Project Manager Junichiro Kawaguchi, JAXA Executive Director Hajime Inoue, Professor Kuninori Uesugi (Mission Adviser), and the chairman for this conference, Professor Matogawa.

Prof. Kawaguchi: We are giving a summary of the events from last night to today. This is the second attempt of landing, following the first attempt on November 19th. In the first landing attempt, we did a touchdown and Hayabusa stayed on the surface for 30 minutes. In the second landing attempt today, we aimed for the sampling that did not take place in the first attempt. Just after the first landing, Hayabusa entered safe mode and flew far away from Itokawa. It took us a week to get it back to original position.
At around 10:00 PM yesterday, we started descent from the distance of 1km. We used optical navigation to guide Hayabusa first, then we switched to the vertical descent phase at around 6:00 AM. Vertical descent is a maneuver to send Hayabusa to the MUSES-SEA on Itokawa along with the direction of the gravity. Once we enter that phase, there is basically no way to remote control from the ground. At 6:52 AM, we issued a dummy sequence of launching target marker. During the descent we found the target marker from last landing attempt, and we avoided the risk of confusing guidance system with multiple target markers.
Target marker was originally intended to help the horizontal guidance, but from the first landing attempt, we gained experience of guiding Hayabusa without target marker. So we planned a sequence of descent and landing that does not rely on the target marker for today's attempt.
At 6:53 AM, the probe was descending at the rate of 4 to 5cm/s; at 35m from the surface, we stopped laser altitude meter, followed by the start of LDR 2 minutes later. At 7:00 AM, with hovering, attitude adjustment according to the terrain was done. Shortly after that, it switched to beacon operation from telemetry.
At 7:03 to 7:05, the mode of laser range finder was switched from range finding mode to sampler control mode. For today's attempt, we used the parameter to use fewer safeguard to achieve full execution of the sequence. That means Hayabusa will not start ascent without firing the bullets.

At 7:35 AM, we confirmed two bullets (projectiles) were fired.

At 8:35 AM, we switched to the DSN Usuda. Data replay has started at Usuda.

Shortly before 11:00 AM, a trouble, possible leakage, was detected in the thruster system.
Actually we were seeing the sign of this problem during the descent phase, but at that time we switched to the backup system and continued the descent.
When we switched to the main system from the backup system and started the thruster operation, the same problem occured. Due to the attitude change, the probe automatically switched to the safe mode. After that, we controlled the valve to stop the leakage.

We'll use the next three days to get it out of the safe mode. Getting out of the safe mode will be our first priority. After that we'll start downloading of the data.

The amount of leakage of propellant does not seem to hinder the current operation. But it definitely raised the bar of making Hayabusa back to Earth.

Because of the leakage incident, we are not able to see the detail of sampling yet. However, the sequence of the onboarded computer is confirmed to have executed normally. We expect the touchdown attitude was good, but we'll have to wait for the completion of data downloading for definite answer."

Edited to human translation.

Korel

Q&A Translation by 5thstar:

"Mainichi: Could we take it as the successful firing of the projectile and ascent this time?
Kawaguchi: That's right. The projectile is designed to be engaged when the distortions of the sampler horn either in the longitudinal and lateral directions were detected. According to the data it was engaged by detecting the horizontal distortion. To increase the yield of the sample, we fired the projectile twice, with 0.2 seconds duration.
The landing was performed with the velocity 10 cm per second, and the sampler horn is shrunk by 10 cm. It takes a second to take off since then.
Mainichi: What was your feelings when you realize the touch down, and how was the operation team doing?
Kawaguchi: They were very excited. They excited because the probe touched down as its attitude was aligned to the surface, and took off, all as planned. Of course I was very excited.
NHK: Sorry to be bugging, but are you certain that you got the sample as this operation was performed as planned?
Kawaguchi: I myself regards it as success, but to be certain, we need circumstantial evidences. We would like to wait the data (that supports the evidence).
Kyodo: I understand the remaining propellant is very critical. Would you try another touch down?
Kawaguchi: I myself think we succeeded to get the sample, so I don't think we need another try. I'm sure the operation team regards it as the same way. Upon confirming the successful engagement of the projectile, we will prepare for returning home.
Asahi TV: Would it be fair to say you have cleared the major milestone?
Kawaguchi: We had been thinking the sampling was a major milestone. Returning home is essentially the same as coming here. We still have to perform the reentry maneuver, but I feel we have cleared about 80 % of the milestones.
NHK: We felt it was very smooth this time. What is the point of success?
Kawaguchi: I think it is in the very precise guidance. We brought the spacecraft very near to the point of the last attempt. There was some displacement but we took the last attempt as a very good reference. That would be the reason we could guide the probe precisely. It would be the result of various tools developed by our creative efforts. We accumulated two rehearsals plus one, and two touchdowns. The experience counts.
Gekkan Tenmon: What is the current situation of the thruster? If you fail to overcome the glitch, what would be the consequences?
Kawaguchi: We still don't know what happened. We have a leak means we are not just simply flying in the space. It could not happen if we are in the space. We can state it as that is the consequence of having landed on the different object.
We still not determine it is a leak. We have events that suggest the leak.

Microphone switched to the Tokyo office:

Asahi: I want to make it clear. What are the circumstantial evidences which confirm the sampling?
Kawaguchi: The sampler horn must be perpendicular to the surface, for example. We have confirmed that on the telemetry data. I will explain to you in detail once we get the enough data.
Nikkei Science: You said you accumulated the precise guidance. The challeng had become more challenging because of the (reaction) wheels malfunction. And you have overcome those challenges. Does this mean you achieved more technical scores than nominal?
Kawaguchi: That's right. The probe gets disturbance due to the thrusters because of the lack of the wheels. At the rehearsals there were much more errors in the position and the velocity. We were able to react to them smoothly in the touchdowns because we learned exactly what we had to to.
Fuji Sankei Business Eye: Have you confirmed the engagement of the pyrotechnics?
Kawaguchi: We would like to download the data through Madrid station. But it would be difficult because the probe is now in the safe mode.
Fuji Sankei Business Eye: Has the leak stopped?
Kawaguchi: We are not sure whether it is a leak. The excess in the fuel consumption has stopped.
Fuji Sankei Business Eye: What are the impacts to the returning home?
Kawaguchi: We realize it is very critical. It depends on how we examine the situation.

Microphone has returned to Sagamihara.

Fuji TV: It may be bugging, but could you explain to the children watching the TV about what knowledge you gain on the success of this mission.
Kawaguchi: As for the science we obtain the knowledge of the history of our Solar system. I see Prof. Fujiwara in the guest seats, and he may be better suited. I'm not sure whether he could give us simpler answers. (Laughter)
For the engineering, we are about to be able to carry out the two-way mission to the celestial objects. Sorry to say this. We are still in the middle of the mission.
Fuji TV: Which direction Japanese space development would evolve, based on this success?
Kawaguchi: The deep space exploration is not the whole story. But I regard the mission like this one has a meaning, if they are to stimulate the science and technology. How about you, division director Inoue and Prof. Uesugi? (They just laughed.)
Akahata: What were your and the members' sleeping hours and your lives since November?
Kawaguchi: We are very tired. We performed the descent to Itokawa six times this month, with only this one had the nominal ascent (laughter). Yet we had the thruster glitch. I feel as if we endured the launch of the rocket several times.
Weekly Post: Did you use the target marker for guidance, the one you dropped last time?
Kawaguchi: We have planned the schedule not to use target markers this time. But we chose to keep recording the data if the probe finds it. And indeed it found the marker.
Weekly Post: This might be a bit of sentiment, but would it be appropriate to say, "the names of 880,000 people guided the spacecraft into success"?
Kawaguchi: I accept that.
Gekkan Tenmon: What about the system of quarantine upon the retrieval of the sample? Also how are you going to analyze them?
Kawaguchi: The fuel on return is the question, but we definitely want to have the quarantine built. We are working on it. As for the analysis of the sample, we have established the collaborations with domestic and foreign institutes.
Gekkan Tenmon: Are there any changes to the share of the sample?
Kawaguchi: No changes.
Sankei: How much sample would you get with the two bullets?
Kawaguchi: It would still be about several hundreds milligram. We shot twice as we know we are going to get sample from regolith. Shooting into regolith generates more debris, but the rate of the trap is small.
Unknown: What are the parameters for the risk abort operation this time?
Kawaguchi: We have reduced the traps to three. 1) LIDR lost the altitude, 2) two of the four laser range finders lost the distance measurements and 3) the delta angle of the spacecraft aligning to the surface exceeds 60 degrees. As for the obstacle sensor, we had set it to the lowest gain last time but it was still triggered (for nothing?). So we turned off the abort on the obstacle sensor.
The sensor was triggered again this time, after changing the attitude to the surface. We made a touchdown despite of this sensor.
Prof. Matogawa and the space science research division head Inoue, please make your comments.
Inoue: We have achieved various results with limited budgets and the resource of launch. I'm affirmed with this accomplishment that the way we have chosen was not wrong. I hope this success would lead to pushing the Japanese space development forward.
Hayabusa is a mission with clearly defined objectives. They succeeded by going through the series of tests step by step. I am respectful of the operation team.
We had various glitches on the media relations as we never experience such a mission. We are here today because of your support and understandings. We thank you very much.
Matogawa: Mission advisor Prof. Uesugi, make your comments.
Uesugi: We thank you for the incredible support on the net. Every member inludeing Prof. Kawaguchi have mastered the operation to a great depth. We had errors of a few cm per second in the first rehearsal, but we maintained at a few millimeter per second in this and the last touchdowns. I am grateful that we have come the long way since our first missions Sakigake and Suisei twenty years ago.
It is the great achievement that we have landed and took off to a celestial body other than Moon. Thank you.

Prof. Matogawa reads the acknoledgement by the JAXA general manager Keiji Tachikawa. (It will be posted to the JAXA home page soon.)

The media takes their pictures.

The picture on Matsuura's blog: from left to right: Prof. Matogawa, Division head Inoue, the project manager Kawaguchi, Prof. Uesugi. Photo by Mitsunari Kita."

http://5thstar.air-nifty.com/blog/jaxa/index.html

Edited to human translation

X

"Японский блог: взятие грунта с астероида в прямом эфире"

http://elementy.ru/news/165005

Gradient

ЦитироватьВозвращение на Землю японского космического аппарата "Хаябуса" во вторник оказалось под вопросом после того, как стало известно о неполадках в двигателях реактивной системы управления аппарата.
Кроме того, начались временные проблемы в контакте с наземными станциями слежения.
На прошлой неделе аппарату удалось успешно сесть на поверхность астероида и взять пробу вещества.
"Нам не удается оживить управляющие двигатели, без них возвращение невозможно", - заявил руководитель проекта Дзюнъитиро Кавагути.
Он добавил, что обнаружены неполадки еще в нескольких системах, которые связаны с работой в низких температурах.
Reuters

amez

Суть вот тут (сообщение от 30.11.2005, в Японии уже "завтра")  http://5thstar.air-nifty.com/blog/jaxa/index.html (англ.) "Hayabusa needs help" - "Kawaguchi holds NASA's 34 m parabola on the 30th and the 1st of December. But they could also make use of 70 m parabolas if possible, for several days, in a hope of quickly recovering the communication with Hayabusa, but they are allocated to Cassini and Voyger missions."

Т.е. проблемы с восстановлением устойчивой связи и восстановлением нарушенной работы двигателя они надеются решить, если удастся получить от NASA 70-метровую антенну на несколько дней для передачи более мощного сигнала команд управления. Поскольку на используемую 34-метровую, видимо мало надежды из-за неточной ориентации приемных антенн Хаябусы.

X

"руководителю проекта, д-ру Кавагучи, мы отправили сообщение,
в котором говорилось о возможной причине неудач – об
отсутствии тяготения у астероида. После этого японцы применили
другой режим снижения, без использования шара-маркера [28],
и последовал успех: "Hayabusa сумел сесть на поверхность
астероида Itokawa и, по всей вероятности, взял образцы грунта...
Продолжительность пребывания зонда на поверхности астероида
составила менее 1 минуты" [29]. На пресс-конференции, когда
д-ра Кавагучи спросили, в чём же заключался секрет успеха,
он ответил: "В прецизионном наведении" [28] – как будто на этот
раз наведение было и впрямь лучше, чем при предыдущих попытках.
 Ясно, что если имеет место сокрытие истинной картины динамики
полётов вблизи астероидов, то этим обрекаются на неудачи
будущие космические программы."
 http://newfiz.narod.ru/maltela1.htm

sol

Вот такой вопрос.
1. Предположим астероид картофелефидной формы вращается вокруг малой оси. (Такое вполне возможно, если по нему хряцнуло другим камушком. Тогда притяжение на экваторе будет вообще отрицательным (всилу преобладания центробежной силы).
Посадить и удерживать там вообще трудновато будет.
2. Даже на той же Итокаве, в седловине притяжение может быть нулевым - потому как по бокам приблизительно равногравитирующие массы. А не в эту ли седловину предполагалась стыковка Соколика и Каменюки?
3. Не отправить ли Хаябусу ловить Миневру - на ионниках.
Схватить грунтозаборником или просто пхнуть к астероиду.
Хотя мне думается - Миня счас на той стороне Итокавы уже приастероидилась. :?
Массаракш!

Жизнь - это падение в пропасть неизвестной глубины и заполненную туманом.