Das Artemis - Programm der NASA. Die Rückkehr zum Mond.

Neues von der Artemis 1 - Mission:

Mon, 29 Aug 2022 09:28:31 +0000

Artemis

The Space Launch System’s core stage liquid oxygen (LOX) and liquid hydrogen (LH2) tanks are fully fueled and both are being replenished. During replenish, the propellant that naturally boils off is being replaced to ensure the tanks are at full capacity for launch. A “go” has been given for liquid oxygen loading into the interim cryogenic propulsion stage.

Siehe auch die Originalnachricht:

Core Stage Fueling in Replenish, Go for Upper Stage LOX Loading – Artemis

Neues von der Artemis 1 - Mission:

Mon, 29 Aug 2022 10:23:36 +0000

Artemis

While liquid oxygen loading into the interim cryogenic propulsion stage continues and core stage tanks continue to be replenished with propellants, engineers are troubleshooting an issue conditioning one of the RS-25 engines (engine 3) on the bottom of the core stage. Launch controllers condition the engines by increasing pressure on the core stage tanks to bleed some of the cryogenic propellant to the engines to get them to the proper temperature range to start them. Engine 3 is not properly being conditioned through the bleed process, and engineers are troubleshooting.

Teams also are assessing what appears to be a crack in one of the flanges on the core stage. The flanges are connection joints that function like a seam on a shirt, are affixed at the top and bottom of the intertank so the two tanks can be attached to it.

Siehe auch die Originalnachricht:

Engineers Troubleshooting Engine Conditioning Issue – Artemis

Nutzen wir die Zeit bis dahin und klären folgende Frage:

Wird die Artemis von unseren Breiten aus sichtbar sein?
Bei heavens-above find ich noch keinen Eintrag in der Satelliten-DB, aber vielleicht suche ich falsch (Artemis, SLS-1)

cs Jochen

Hi matss,

Zitat von matss

Hi Jochen,

[...]

Vielleicht liegt es daran, dass Artemis 1 kein Satellit ist und/oder Bahnelemente erst nach dem Start vorliegen ...

lg matss

Nun, zumindest abgebrannte Raketenstufen werden in der "Täglichen Vorhersage" angezeigt.
Aber Du könntest damit Recht haben, dass einfach noch keine verlässlichen Bahndaten bekannt sind.
Zumal, wenn der konkrete Start noch wackelt wie momentan.
Meistens reagiert der Chris recht schnell auf aktuelle Ereignisse wie die Starlinkstarts oder seinerzeit die Tiangong
und pflegt die in seine DB ein, daher meine "Ungeduld".

cs Jochen

Neues von der Artemis 1 - Mission:

Mon, 29 Aug 2022 12:19:32 +0000

Artemis

Teams are in a hold in the countdown at T-40 minutes while engineers continue to assess an issue conditioning engine 3, one of four RS-25 engines on the bottom of the Space Launch System rocket’s core stage. Engineers are looking at options to gather as much data as possible.

Siehe auch die Originalnachricht:

https://blogs.nasa.gov/artemis/2022/08/29/teams-continue-to-hold-while-data-gathering-continues/

mh ja, schade, - wenn ich zufällig schon mal nen live stream ansehe

gibt es da was , wo man sich zum nächsten Termin benachrichtigen lassen kann - in der Art ?

gruß aus hamburg , thomas

Neues von der Artemis 1 - Mission:

Mon, 29 Aug 2022 12:50:48 +0000

Artemis

The launch director halted today’s Artemis I launch attempt at approximately 8:34 a.m. EDT. The Space Launch System rocket and Orion spacecraft remain in a safe and stable configuration. Launch controllers were continuing to evaluate why a bleed test to get the RS-25 engines on the bottom of the core stage to the proper temperature range for liftoff was not successful, and ran out of time in the two-hour launch window. Engineers are continuing to gather additional data.

Siehe auch die Originalnachricht:

Launch Attempt Scrubbed – Artemis

hi matss,

schon geschehen, dann ggf bis Freitag

gruß thomas

Geht er heut' net, geht er morgen ... wie bei der DB ...

Hi,

wegen Sichtbarkeit - ich denke sie werden auf Inklination 28 Grad bleiben (Florida , Start ~ nach Osten). Nach dem Kick zum Mond wird es auch für Europa interessant, aber die Entfernung/Höhe von mehreren Tausend Kilometern ist dann vielleicht zu groß für Frei Auge.

Immerhin: Geo Satelliten spüren wir mit Ferngläsern, und auf jeden Fall mit einem Teleskop ja auf, muss man halt genau wissen worauf man sein Teleskop richten muss. Finder Chart ist wohl nicht ... bin gespannt!

CS,

Walter

Neues von der Artemis 1 - Mission:

Mon, 29 Aug 2022 18:23:24 +0000

Artemis

Engineers are evaluating data gathered during the Artemis I launch attempt Monday, Aug. 29, when teams could not get the rocket’s engines to the proper temperature range required to start the engines at liftoff, and ran out of time in the two-hour launch window to continue. The mission management team will convene Tuesday afternoon to discuss the data and develop a plan forward.

The Space Launch System’s four RS-25 engines must be thermally conditioned before super cold propellant begins flowing through them for liftoff. Launch controllers condition them by increasing the pressure on the core stage liquid hydrogen tank to route, or “bleed” as it is often called, a portion of the approximately minus 423 F liquid hydrogen to the engines. Managers suspect the issue, seen on engine 3, is unlikely to be the result of a problem with the engine itself.

During the countdown, launch controllers worked through several additional issues, including storms in the area that delayed the start of propellant loading operations, a leak at the quick disconnect on the 8-inch line used to fill and drain core stage liquid hydrogen, and a hydrogen leak from a valve used to vent the propellant from the core stage intertank.

NASA will host a media teleconference Tuesday, Aug. 30, at approximately 6 p.m. EDT to provide an update on data analysis and discussions. The time is subject to change. While managers have not yet set a date for the next launch attempt, the earliest possible opportunity is Friday, Sept. 2, during a two-hour launch window that opens at 12:48 p.m.

Siehe auch die Originalnachricht:

Engineers Assess Data After Scrub, Mission Managers to Meet Tuesday Afternoon   – Artemis

Neues von der Artemis 1 - Mission:

Wed, 31 Aug 2022 01:03:28 +0000

Artemis

NASA will target Saturday, Sept. 3 at 2:17 p.m. EDT, the beginning of a two-hour window, for the launch of Artemis I, the first integrated test of NASA’s Orion spacecraft, Space Launch System (SLS) rocket, and the ground systems at the agency’s Kennedy Space Center in Florida.

Mission managers met Tuesday to discuss data and develop a forward plan to address issues that arose during an Aug. 29 launch attempt for the flight test. During that launch attempt, teams were not able to chill down the four RS-25 engines to approximately minus 420 degrees F, with engine 3 showing higher temperatures than the other engines. Teams also saw a hydrogen leak on a component of the tail service mast umbilical quick disconnect, called the purge can, and managed the leak by manually adjusting propellant flow rates.

In the coming days, teams will modify and practice propellant loading procedures to follow a procedure similar to what was successfully performed during the Green Run at NASA’s Stennis Space Center in Mississippi. The updated procedures would perform the chilldown test of the engines, also called the kick start bleed test, about 30 to 45 minutes earlier in the countdown during the liquid hydrogen fast fill liquid phase for the core stage.

Teams also are configuring platforms at Launch Pad 39B to enable engineers access to the purge can on the tail service mast umbilical. Once access is established, technicians will perform assessments and torque connection points where necessary.

Meteorologists with the U.S. Space Force Space Launch Delta 45 predict favorable weather conditions for Saturday. While rain showers are expected, they are predicted to be sporadic during the launch window.

The mission management team will reconvene Thursday to review data and overall readiness.

Siehe auch die Originalnachricht:

NASA Targets Sept. 3 for Next Artemis I Moon Mission Launch Attempt – Artemis

Neues von der Artemis 1 - Mission:

Wed, 31 Aug 2022 19:32:27 +0000

Artemis

Meteorologists with the U.S. Space Force Space Launch Delta 45 predict a 60% chance of favorable weather conditions for an Artemis I launch attempt during a two-hour window that opens at 2:17 p.m. EDT Saturday, Sept. 3. While rain showers are expected in the area, they are predicted to be sporadic during the launch window.

Today, engineers are implementing plans approved at yesterday’s mission management team meeting to address issues that arose during a launch attempt Aug. 29. The mission management team will reconvene Thursday, Sept. 1 to review data and overall readiness — NASA subsequently will hold a status update at 6 p.m. EDT.

The countdown for launch is scheduled to resume Saturday at 4:37 a.m., at the L-9 hour, 40 minutes planned hold in the countdown where managers receive a weather briefing and conduct a poll on whether to proceed with propellant loading operations. Launch controllers do not need to begin the initial 46 hour, 10 minute countdown again because many of the configurations needed for launch are already in place.

On Saturday, live coverage of tanking operations with commentary on NASA TV will begin at 5:45 a.m. EDT. Full launch coverage in English will begin at 12:15 p.m. and NASA en espanol broadcast coverage will begin at 1 p.m. EDT. Click here for the latest information on launch briefings and events.

Siehe auch die Originalnachricht:

Weather Favorable for Sept. 3 Launch, Teams Press Ahead with Plan to Address Issues  – Artemis

Geht heute (Do) um 12:00 los

#heiseshow: Auf zum Mond – was Astronaut Matthias Maurer über Artemis sagt

Gruß,

Martin

Hi,

immer diese US Küsten Zeiten (mal Ost-, mal Westküste) . Die wollen doch die ganze Welt begeistern, dann gib doch mal eine UTC in Klammern raus, NASA...

also: Das Zeitfenster öffnet sich (Samstag 3. SEP) um

EDT : 2:17 p.m (14:17)

UTC: 18:17

MESZ: 20:17

dann öffnet sich ein 2-Stunden-Startfenster

Schade, daß die Inklination so flach sein wird, keine Chance eine Abendhimmel Sichtung zu bekommen :-(, selbst wenn sie später starten (bis zu 22:17) und hier dann Dämmerungshimmel ist.

Na, man kann nicht alles haben ... Ich bin jedenfalls dabei am Monitoren am Samstag.

CS,

Walter

Neues von der Artemis 1 - Mission:

Thu, 01 Sep 2022 23:50:38 +0000

Artemis

The countdown to launch has resumed, and the Artemis I mission management team met this afternoon to review the status of the operations and have given a “go” for a Sept. 3 launch attempt of the Space Launch System rocket and Orion spacecraft. Since the previous launch attempt on Monday, Aug. 29, teams have updated procedures, practiced operations and refined timelines.

Over the last day, teams worked to fix a leak on the tail service mast umbilical by replacing a flex-hose and a loose pressure sensor line, as the likely the source of the leak. Teams also retorqued, or tightened, the bolts surrounding that enclosure to ensure a tight seal when introducing the super-cooled propellants through those lines. While there was no leak detected at ambient temperatures, teams will continue to monitor during tanking operations.

Teams will adjust the procedures to chill down the engines, also called the kick start bleed test, about 30 to 45 minutes earlier in the countdown during the liquid hydrogen fast fill phase for the core stage. This will to allow for additional time to cool the engines to appropriate temperatures for launch.

Meteorologists with the U.S. Space Force Space Launch Delta 45 predict 60% favorable weather conditions, improving throughout the window for Saturday.

Tune in to NASA Television, the NASA app, or the agency’s website at 9 a.m. for a prelaunch media briefing. Participants include:

• Jeremy Parsons, Exploration Ground Systems, deputy program manager, NASA Kennedy
• Melody Lovin, weather officer, Space Launch Delta 45

On Saturday, live coverage of tanking operations with commentary on NASA TV will begin at 5:45 a.m. EDT. Full launch coverage in English will begin at 12:15 p.m. and NASA en espanol broadcast coverage will begin at 1 p.m. EDT. Click here for the latest information on launch briefings and events.

Siehe auch die Originalnachricht:

Countdown To Artemis I Launch Resumes: Mission Managers Give “Go” for Sept. 3 – Artemis

Neues von der Artemis 1 - Mission:

Fri, 02 Sep 2022 14:46:50 +0000

Artemis

Following the Artemis I pre-launch briefing, meteorologists with the U.S. Space Force Space Launch Delta 45 predict a 60% chance of favorable weather conditions at the beginning of the two-hour launch window that opens at 2:17 p.m. EDT Sept 3, increasing to an 80% chance of favorable weather conditions toward the later part of the window. The primary weather concern for the two-hour launch window remains scattered rain showers. The weather guidelines for NASA’s Artemis I flight test identify conditions to launch the agency’s Space Launch System (SLS) and Orion spacecraft.

Teams will continue working their way through the countdown conducting planned health checks on SLS and Orion systems. The mission management team will meet early in the morning, Saturday, Sept. 3 and give the final determination for a “go” or “no-go” decision to begin tanking operations.

The uncrewed flight test will test SLS and Orion as an integrated system, demonstrating the performance of the rocket and testing the spacecraft’s capabilities as it journeys about 40,000 miles beyond the Moon over the course of about six weeks.

The first in an increasingly complex series of missions, Artemis I will pave the way for long-term lunar exploration, providing the foundation for extending human presence to the Moon and beyond.

Live coverage will begin on NASA television on the agency’s website and the NASA app at 5:45 a.m. with commentary and views of the rocket during tanking operations. Full launch coverage begin at 12:15 p.m. EDT on NASA Television and the agency’s website, as well as YouTube, Twitter, Facebook, LinkedIn, Twitch, Daily Motion, Theta.TV, and the NASA app. NASA en espanol broadcast coverage will begin at 1 p.m. EDT.

Siehe auch die Originalnachricht:

Weather Remains 60% Favorable for Artemis I Launch, Sept 3. – Artemis

Neues von der Artemis 1 - Mission:

Sat, 03 Sep 2022 09:23:18 +0000

Artemis

The Artemis I Mission Management Team has given the “go” to proceed toward tanking operations.

Weather conditions remain 60% favorable at the beginning of the two-hour launch window which opens at 2:17 p.m. EDT Sept. 3, with conditions improving to 80% favorable toward the later part of the window.

Artemis I launch director Charlie Blackwell-Thompson is scheduled to give the “go” shortly to officially begin propellant loading operations.

During tanking operations, teams will fuel the Space Launch System (SLS) rocket with liquid oxygen (LOX) and liquid hydrogen (LH2), beginning with the rocket’s core stage and then the interim cryogenic propulsion stage.

Tanking begins with chilling down the LOX lines for the core stage. The process for the chill down, or cooling, uses the propellant lines to load the rocket’s core stage LOX in preparation for tanking. The LOX tank holds 196,000 gallons of liquid oxygen, cooled to minus 297 degrees Fahrenheit. In sequential fashion, LOX and LH2 will flow into the rocket’s core stage tank and be topped off and replenished as some of the cryogenic propellant boils off.

The process involves slowly filling the core stage with propellant to thermally condition the tank until temperature and pressure are stable before beginning fast fill operations, which is when the tank is filled at a quicker pump speed. As the super cold liquid oxygen fills the core stage tank, some venting may be visible. The team also will conduct leak checks to ensure propellant loading is proceeding as expected.

At 5:45 a.m., NASA TV coverage begins with commentary of tanking operations to load propellant into the SLS rocket. Full coverage begins at 12:15 p.m. in English and at 1 p.m., coverage in Spanish begins.

A full list of countdown milestones is available here.

Siehe auch die Originalnachricht:

Mission Managers Give “Go” to Proceed Toward Tanking Operations for Artemis I – Artemis

Neues von der Artemis 1 - Mission:

Sat, 03 Sep 2022 09:36:49 +0000

Artemis

Artemis Launch Director Charlie Blackwell-Thompson has given the “go” to officially begin loading propellants into the Space Launch System rocket. Tanking begins with chilldown of the core stage liquid oxygen transfer line.

NASA TV coverage will begin at 5:45 a.m. http://www.nasa.gov/live.

Siehe auch die Originalnachricht:

Launch Director Gives “Go” to Begin Cryogenic Operations – Artemis