Autor Wątek: Europa Multiple-Flyby Mission - EMFM (Europa Clipper)  (Przeczytany 8478 razy)

0 użytkowników i 1 Gość przegląda ten wątek.

Offline Orionid

  • Weteran
  • *****
  • Wiadomości: 9183
  • Very easy - Harrison Schmitt
Odp: Europa Multiple-Flyby Mission - EMFM (Europa Clipper)
« Odpowiedź #60 dnia: Lipiec 14, 2018, 09:18 »
Przedstawiono symulację przemieszczania się wód oceanicznych na Europie.
Jeśli hipoteza transportu wody ku powierzchni okaże się trafna , to sonda Europa Clipper  będzie zbierać dane o zamarzniętych wodach Europy po ok. milionie lat po  ich uformowaniu , co i  tak byłoby bardzo młodą strukturę do badania.

Europa’s Ocean Ascending
July 3, 2018



(...) The animation is a two-dimensional simulation of a possible cross-section of a band running through Europa's ice shell. At the extreme bottom is Europa's ocean, and the thick white line across the top represents the moon's surface ice. The midsection is the bulk of Europa's ice shell, with warmer colors (red, orange, yellow) representing stronger, more rigid ice. Depth is marked on the left side of the animation while numbers on the bottom measure distance from the center of the band feature on Europa's surface. Bands on Europa and Ganymede are typically tens of miles wide and hundreds of miles long. Numbers at the top mark the passage of time in thousands of years.

As the animation runs forward, the ice shell is deformed by gravitational interactions with Jupiter. The cold, brittle ice at the surface gets pulled apart. At the same time, faults in the upper ice form, heal, and re-form (visible as diagonal yellow, green and blue lines in the upper center of the animation). The churning material that quickly fills the bottom half of the view is a collection of tiny white dots representing bits of Europa's ocean that have been frozen into the bottom of Europa's ice shell (i.e. where the liquid ocean is in contact with the frozen shell). (...)

https://www.nasa.gov/feature/jpl/europa-s-ocean-ascending

Online ekoplaneta

  • Weteran
  • *****
  • Wiadomości: 6434
  • One planet Once chance
Odp: Europa Multiple-Flyby Mission - EMFM (Europa Clipper)
« Odpowiedź #61 dnia: Styczeń 23, 2019, 11:41 »
W styczniowym numerze National Geographic jest artykuł o poszukiwaniu życia pozaziemskiego. Trochę tam piszą o Europa Clipper więc link do arta załączam tutaj, żeby rozruszać ten wątek. Poza tym dołączam link do artykułu na blogu Billa Nye o misji Europa Clipper  :)

https://www.nationalgeographic.com/astrobiology/

https://news.nationalgeographic.com/news/2014/06/140618-europa-bill-nye-jupiter-extraterrestrial-life-nasa/

Offline Orionid

  • Weteran
  • *****
  • Wiadomości: 9183
  • Very easy - Harrison Schmitt
Odp: Europa Multiple-Flyby Mission - EMFM (Europa Clipper)
« Odpowiedź #62 dnia: Marzec 21, 2019, 11:14 »
jako, że projekt jest na wczesnym etapie prac, to możliwe było usunięcie instrumentu ICEMAG z powodu dużego ryzyka niepowodzenia.

Cytuj
Similar concerns came from the Outer Planets Assessment Group, an advisory panel that released “special findings” about ICEMAG March 13 outside of its usual cycle of meetings. “To those not involved in the process, this news came as a complete surprise,” the group said of the decision to remove ICEMAG. “We encourage NASA to ensure that this or any other termination decision is transparent, and avoid the perception that this [principal investigator]-led experiment team received a seemingly punitive decision that is disproportionate to the challenges faced by the team.”

Glaze said that cost alone was not the reason for removing ICEMAG. “The emphasis is not so much on the overall cost growth but on the other risks that were inherent in the design and the approach that was going forward,” she said. “Most of the concern had to do with the future risks and the fact that instrument was not stabilizing.”

Artykuły astronautyczne

Online ekoplaneta

  • Weteran
  • *****
  • Wiadomości: 6434
  • One planet Once chance
Odp: Europa Multiple-Flyby Mission - EMFM (Europa Clipper)
« Odpowiedź #63 dnia: Maj 30, 2019, 09:54 »
Wewnętrzne śledztwo NASA ujawniło kłopoty w projektach Europa Clipper i Europa Lander:

"Our audit found that despite robust early-stage funding, NASA's aggressive development schedule, a stringent conflict of interest process during instrument selection, an insufficient evaluation of cost and schedule estimates, and technical workforce shortages have increased instrument integration challenges and development risks for the Clipper mission," John Schulz, a management analyst at the Office of Inspector General, said in a video released with the report.

The report highlighted that since 2013, Congress has provided more than $2 billion for the pair of Europa missions. The Clipper mission alone is expected to cost at least $2.8 billion, according to the report.

Every year of that period, the missions' funding has exceeded NASA's budget request. But with all that money has come a lot of strings. First, Congress has ordered NASA to launch both missions on the agency's SLS rocket, which is still in development. Congress also set specific launch targets — currently 2023 for Europa Clipper and 2025 for Europa Lander.


Another challenge the investigation found is that the Clipper mission is struggling to manage its staffing. The mission is run out of NASA's Jet Propulsion Laboratory (JPL) in California. But as of December, about 10% of Clipper's JPL staff roles were vacant, the investigation found, in part because the center is running four other key NASA projects, including Mars 2020, and keeps having to shuffle staff members between the neediest missions.


https://www.space.com/europa-clipper-lander-missions-nasa-challenges.html

Niech się dalej zastanawiają nad lotem Europa Clipper na SLS to dolecą do papierowego albo elektronicznego archiwum NASA o zarzuconych projektach  :(

Poza tym nawet jakby wszystko szło z europiańskimi misjami dobrze to czy wystarczy agencji kasy na misje i lądownik ludzi na Księżycu w 2024 lub lekko po tej dacie? Czy wystarczy pieniędzy na międzynarodową misję Mars Sample Return? NASA w tej misji musiałaby zbudować i przetestować rakietkę, która wyniosła by z lądownika marsjańskiego bezcenne próbki na orbitę Czerwonej Planety. Jeszcze utrzymywanie ISS przynajmnjiej do 2024 roku. O telskopach JWST i SWIFT już nie wspominam. Tyle ambitnych celów w jednej dekadzie! Normalnie to wystarczyłoby ich na dwie dekady! NASA musi mieć większy budżet albo zrezygnować z niektórych celów.  :'(

Offline ah

  • Senior
  • ****
  • Wiadomości: 585
Odp: Europa Multiple-Flyby Mission - EMFM (Europa Clipper)
« Odpowiedź #64 dnia: Maj 30, 2019, 10:04 »
Kluczowy jest ten fragment:
...Every year of that period, the missions' funding has exceeded NASA's budget request. But with all that money has come a lot of strings. First, Congress has ordered NASA to launch both missions on the agency's SLS rocket, which is still in development. Congress also set specific launch targets — currently 2023 for Europa Clipper and 2025 for Europa Lander.