ESA Cluster

@pimenteljm @diogogtome [Bruno] bem há 2 anos eram 22,5 horas, hoje, pelas minhas contas devem ser 23,14 hr, ou seja quase um dia... o erro não foi esse :)

@diogogtome Qual é o valor verdadeiro? É mesmo um erro, não uma imprecisão.

No episódio desta semana, falei sobre Exploração Espacial com Bruno Sousa, eng aeroespacial na ESA. Ao ouvir o ep, o Bruno reparou num erro, mas eu apostei que ninguém notaria. Por isso, decidimos lançar o desafio: quem identificar o erro, recebe merch da ESA. Alguém apanha?😎

@pimenteljm @tor31890388 [Bruno] e a outra pista que liga as duas está na imagem dos artigos de merchandise!

@tor31890388 Há aqui uma pista 😉

[Bruno] Na analogia referia-me à distancia a que o lander é separado da nave mae na chegada a Marte, o que é feito a 1 MKm de distancia - essa parte está ok - quando mudei de escala dividindo tudo por 1000, fica 1000 km que é a distancia em linha recta aproximada de Lisboa a Barcelona

@pimenteljm Quanto ele tenta dar a analogia entre a distância terra marte e lisboa barcelona julgo que diz que a distância terra marte é de um milhão de Km, que está cerca de 2 ordens de grandeza fora do valor médio de ~200 milhões. A minima mesmo assim ainda são ~50Km

We hereby declare the Cluster II Science Mission successfully concluded from the Operations team side - after 24 years, 1 month and 14 days since the achievement of its formation on the 16-08-2000. So long Cluster, forever the 4-spacecraft formation mission in the magnetosphere!

Last night, at 00:00, we have switched off the payload on all the remaining spacecraft and this morning we have successfully downlinked all the remaining science data on-board.

@beej69 @AschbacherJosef Those are actively controlled re-entries. By targeted we mean, we've targeted the re-entry conditions well in advance (in this case back in January)

@AschbacherJosef Hi Mr. Aschbacher Why do you not consider every reentry by a crewed vehicle or return missions like the ones done by, e.g., Cargo Dragons, not to have been targeted?

Goodnight, Cluster World's first targeted reentry explained: youtube.com/watch?v=KFNLzU…

With this first-ever targeted reentry, Cluster will go down in history for a second reason – taking ESA well beyond international standards, and helping ensure the long-term sustainability of space activities. 📸First recorded observation of a satellite reentry from a high-speed orbit, taken from a plane in bright daylight!

With the reentry of its first of four satellites, it's time to bid our Cluster mission farewell. After 24 years in space, this marks the end of science observations for the prolific mission. esa.int/Science_Explor…

@JMcKillip4 twitter.com/ESA_Cluster/st…

@ESA_Cluster Was the plane’s video capture of the reentry successful?

Right about now, Cluster's Salsa satellite is taking the plunge into Earth's atmosphere. Farewell, Salsa! Thank you for your service!🫡

With the reentry complete, we're hoping to learn more soon about the results of an airborne observation experiment. With the plane three hours from land, we wait patiently for further information. We’ll be back tomorrow with an update. More info via our blog 👉 blogs.esa.int/rocketscience/… For now, thank you for following and goodnight!

@esaoperations It's been a blast! Thanks for everything @esaoperations.

@ESA_Cluster The final signal after 24 years of contact 🥲

A few minutes ago, the Cluster operations team successfully listened one final time for Salsa via the Estrack ground station in Kourou. Communication with the satellite has now reached its end.

@Astro_Aure We're defining it as the moment that Salsa comes within 70 km from Earth's surface; around this point, we expect the satellite to start breaking up.

@ESA_Cluster How do you define the start of reentry ? It seems too precise for such a blurry event 😅

🆕 Latest news on Salsa. The satellite is expected to reenter at 20:47 CEST (18:47 UTC) today, with an uncertainty of just four seconds either way. Follow our live blog for the latest updates 👉 blogs.esa.int/rocketscience/…

With just one hour to go until reentry, find out what we're doing and why 👇 esa.int/Science_Explor…

The exact moment on Friday when the @ESA_Cluster operations team recovered Salsa for one final orbit after its searing hot final perigee knocked the spacecraft into survival mode. That final orbit comes to an end in just ~90 minutes. 👏🥲

Everything you need to know about our world-first targeted reentry, taking place this evening 👇 youtube.com/watch?v=KFNLzU…

@transtage05 Something like this? esa.int/ESA_Multimedia…

@ESA_Cluster is there any sort of visibility map for salsa’s re-entry?

🆕 Latest news on Salsa. The satellite is expected to reenter at 20:48 CEST (18:48 UTC) on 8 September 2024, with an uncertainty of two minutes either way 👇 blogs.esa.int/rocketscience/… We're getting closer and closer to waving this satellite a goodbye forever 🥹