Третья жизнь ISEE-3

Автор instml, 09.04.2013 08:28:08

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Старый

Цитироватьopty пишет: 
Топливо в ISEE-3 и сейчас осажено , центробежная сила его прижимает , а вот достаточно ли её для осуществления сепарации - другой вопрос . Если там образовалось что типа гидразинно-азотной пены то вероятно да , если же диффузионные процессы имели место то почти наверняка нет
При снижении давления должно произойти вспенивание как в бутылке с газировкой. А потом жидкость и газ разделяются как в ней же.
1. Ангара - единственная в мире новая РН которая хуже старой (с) Старый Ламер
2. Назначение Роскосмоса - не летать в космос а выкачивать из бюджета деньги
3. У Маска ракета длиннее и толще чем у Роскосмоса
4. Чем мрачнее реальность тем ярче бред (с) Старый Ламер

che wi

@ISEE3Reboot 

Цитироватьwe want to heat the fuel tanks and then fire the engines several hundred times to clear gas out of the lines

PIN

Чего и следовало ожидать. Только модулировать нужно не слишком быстро. Думаю,  они в курсе...

Reader

Цитироватьche wi пишет:
@ISEE3Reboot
Цитироватьwe want to heat the fuel tanks and then fire the engines several hundred times to clear gas out of the lines
"Долбаный алгоритм" (с)  ;)

Liss

Спецы из МакМунса говорят, что придумали способ и на этой неделе будут пробовать:

Цитировать ISEE3 Reboot Project @ISEE3Reboot  ·  20 ч
 If you are reading news stories that suggest our project is ending: NOT TRUE. We're hoping to fix the #ISEE3 propulsion system this week.

ISEE3 Reboot Project @ISEE3Reboot  ·  20 ч
 We're focusing on heating hydrazine tanks & then making long series of thruster firing attempts to clear the lines. More info soon. #ISEE3

ISEE3 Reboot Project @ISEE3Reboot  ·  2 ч
 We're putting final touches on #ISEE3 propulsion repair process to be implemented this week. We think there is still plenty of fuel for TCM
Сказанное выше выражает личную точку зрения автора, основанную на открытых источниках информации

Liss

Завтра собираются "чинить водопровод" :-)

 ISEE-3 Status Report 15 July 2014

ЦитироватьBy Keith Cowing on July 15, 2014 12:41 PM
 
Our next window at Arecibo is tomorrow (Wednesday) between 12:19 pm and 3:03 pm ET. During that opportunity we intend to attempt a deep space plumbing repair on board ISEE-3 and then fire its engines.
Right now we still only need approximately 10 m/sec of Delta V for the Trajectory Correction Maneuver (TCM) so we're looking good in terms of fuel reserves. Based on the number of thruster firings we achieve during that plumbing repair session we'll need to do some additional firings - possibly over the course of several days - all of which will constitute the TCM.
If you have ever had to clean our your car's carburetor and fuel lines then you have an idea of what we will be attempting. More details to follow.
Сказанное выше выражает личную точку зрения автора, основанную на открытых источниках информации

che wi

На первой попытке включения двигателей не произошло, готовятся ко втоорой.

che wi

ЦитироватьISEE3 Reboot Project ‏@ISEE3Reboot  1h

We managed to get some propulsion today from #ISEE3 Now the challenge is to get a lot more of it! Working revised fault tree / action plan


ЦитироватьISEE3 Reboot Project ‏@ISEE3Reboot  1h

Fuel needed for a good TCM burn is still around 10 m/sec but soon it will start climbing by 1 m/sec/day and then even faster


ЦитироватьISEE3 Reboot Project ‏@ISEE3Reboot  1h

We're hoping to start using Morehead State University's dish very soon. Waiting for a #NASA permit to do so.

opty

Пишут что в ближайшее время delta-V необходимая для выхода на окололунную орбиту будет расти на 1 м/с в сутки . Сейчас она примерно 10 м/с

che wi

Краткий отчёт по вчерашним операциям
http://spacecollege.org/isee3/isee-3-status-report-18-july-2014.html

ЦитироватьDuring our pass at Arecibo today we managed to get some propulsion out of thruster K. We're looking at how this was accomplished with an eye toward repeating it.

We expect to do a DSN pass on 24 July so as to further refine the spacecraft's location.

We are also working to start communicating with ISEE-3 from Morehead State University in the very near future.

We also have one of many documentary teams at McMoons today to document our efforts.


che wi

ЦитироватьISEE3 Reboot Project ‏@ISEE3Reboot  3m

Our task today is to try & "hammer" the latch valves by turning them on & off multiple times to see if this gives us propellant flow

che wi

Отчёт о вчерашних операциях (23 июля)
http://spacecollege.org/isee3/isee-3-status-report-23-july-2014.html

ЦитироватьWe had a session with ISEE-3 today via Arecibo with support from AMSAT-DL/Bochum team in Germany. We engaged in "hammer mode" wherein we tried to open and close all of the latch valves repeatedly with the hope that this might get the propulsion system working. It did not. We then began to transition the spacecraft to science mode by turning on two additional science instruments. We'll post a detailed update tomorrow.

che wi

ЦитироватьISEE3 Reboot Project ‏@ISEE3Reboot  5m

We are not planning any further propulsion attempts due to lack of Nitrogen pressurant

Reader

Очень жаль. До какой дистанции будут возиться с КА, интересно 

opty

Похоже уже поздняк , им уже нужно приращение в 25 м/с для того что бы на орбиту вокруг Луны выйти . А так его бросать не собираются , связь будут поддерживать - научные приборы в порядке

Integral

#156
Пролетел мимо... Что ж, может, еще вернется через некое количество лет - вдруг попытка окажется более успешной?  ;)

А научные данные с его приборов интересные и полезные принимаются. Причем вроде была идея того, чтобы часть из них "сбросить" на аппараты, которые на орбите Луны. А с них уже на Землю. Или нет?

opty

Ну насколько я понял из их сообщений в твиттере бросать его не собираются . Связь будут поддерживать , и регулярно принимать научные данные , ибо ВСЕ научные приборы в порядке . И вроде в планах перепрограммировать БЦВМ изменив протоколы на более современные что бы связь с ним хоть на минимальной скорости могла быть установлена на 4.5 метровой обыкновенной спутниковой тарелке , и не пришлось бы арендовать время на "настоящих" станциях космической связи

che wi

After Moon Flyby, Vintage NASA Spacecraft to Study the Sun
http://www.space.com/26825-vintage-nasa-spacecraft-solar-science-isee3.html

ЦитироватьAs a vintage spacecraft soars out of Earth's vicinity, the private team working with it plans to use the probe for solar science for as long as they can stay in touch with the satellite.

The minds behind the so-called ISEE-3 Reboot Project have been controlling the 36-year-old International Sun-Earth Explorer (ISEE-3) for the past few weeks. At first they planned to park it close to Earth, but they abandoned that plan after finding out that the probe was out of the pressurant needed to move the craft.

At least some of the 13 science instruments are still working, however. So the old spacecraft will do one of the things it was originally tasked to do: study solar weather. Its measurements will be compared with those taken by the network of satellites that are closer to Earth's vicinity like NASA's Solar TErrestrial RElations Observatory (STEREO). [See photos of the ISEE-3 mission]

"By comparing the measurements between these ... spacecraft, we can get some idea of the scale sizes of the turbulence of the solar wind and the structure within the solar wind," said Christopher Scott, a United Kingdom-based project scientist with STEREO, in a Google+ Hangout on ISEE-3 Sunday (Aug. 10).

He added this would be important information for space weather forecasts, which allow scientists to predict how severe a storm could be when it reaches Earth. Strong solar storms have the potential to damage satellites in orbit or even cause ill effects to power systems on the ground.

ISEE-3 passed within about 7,500 miles (12,000 kilometers) of the moon on Sunday before continuing on its orbit around the sun. Officials on the broadcast predict they will be able to hear fr om the probe for about the next couple of months.

Before going into lunar space, ISEE-3 passed through a part of Earth's magnetic field, specifically the magnetopause (the outer limit of the magnetosphere) and the bow shock (the area between the magnetopause and more neutral space.) The University of Iowa is now examining data collected during the fly-through, said co-leader Dennis Wingo.

Спойлер
"To me, it's absolutely thrilling that we're getting all this space weather," Wingo said during the broadcast. Officials also noted that learning about space weather in our solar system could help researchers learn more about space weather in other solar systems.

The founders behind the ISEE-3 project raised roughly $160,000 through crowdfunding in order to open communication with and attempt to move the spacecraft.

During the Sunday broadcast, co-leader of the project Keith Cowing said that most donations were only in the $10 to $50 range, and mostly from contributors who are not self-described space people.

"I tweeted a joke about disco once and I suddenly got donations from people saying, 'Hey, I heard your comment about disco,'" Cowing said.

ISEE-3 was launched in the 1970s to examine solar activity, and was repurposed for flying by two comets, among other tasks. NASA put the spacecraft into hibernation in 1998, wh ere it remained until the group made contact with it again this year under a Space Act Agreement.
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