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Tower clear is no longer a relevant call


Wasn't "Tower Clear" used at one time to mark the moment when control shifted from KSC to JSC?  Or does the shift now occur a at pre-defined number of seconds after liftoff?  Perhaps SLS has its own timer for this.
I believe Shuttle did at pad release/liftoff. Because by then it is no longer on the pad but a vehicle in flight. Once it was released KSC had no way of controlling it beside having the range blow it up.
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Other Launchers (Korean, Brazilian etc.) / Re: UK launch schedule
« Last post by Salo on Today at 09:15 pm »
https://twitter.com/jeff_foust/status/1557754907901304834
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Jeff Foust @jeff_foust
A couple other notes from the launch session at #smallsat:

- Moog says its SL-OMV tug is on track for launch in 1st quarter of 2023 on ABL’s RS1 from SaxaVord on the UK Pathfinder launch.
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https://twitter.com/nextspaceflight/status/1557837335382831104

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LOX subcoolers are spooling up and the orbital launch mount is venting again. Could they be going again!?!

Edit to add:

https://twitter.com/nextspaceflight/status/1557838961057226753

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And now the support van is lining up at the roadblock. I think this tank farm thing was a false alarm. We'll see.
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ISS Section / Re: Expedition 67 Thread
« Last post by Rondaz on Today at 09:10 pm »
Picture taken #fromspace onboard the @Space_Station by @ESA astronaut @AstroSamantha

Isola d'Elba (Aug 07) @italia #Italy

#Expedition67 #ISS #MissionMinerva

https://twitter.com/RikyUnreal/status/1557708686709215244
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General Discussion / Re: Best Looking Rocket
« Last post by r8ix on Today at 09:07 pm »
Great idea for a thread, Jim! As much as I love the Falcon 9 for what it does, it is a rather boring looking rocket being essentially a long straight stick.

Well, there is one aspect of Falcon 9/H that is particularly good looking:
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August 11, 2022
RELEASE 22-086
NASA Transfers Landsat 9 Satellite to USGS to Monitor Earth’s Changes

NASA transferred ownership and operational control on Thursday of the Landsat 9 satellite to the U.S. Geological Survey (USGS) in a ceremony in Sioux Falls, South Dakota.

Landsat 9 is the most recent in the Landsat series of remote-sensing satellites, which provide global coverage of landscape changes on Earth. The Landsat program – a joint effort between NASA and USGS – recently marked 50 years of continuous service on July 23.

“For more than fifty years now, Landsat satellites have helped us learn more about how Earth systems work, how human activities affect those systems, and how we can make better decisions for the future,” said NASA Administrator Bill Nelson. “Landsat 9, the latest joint effort by NASA and USGS, proudly carries on that remarkable record.”

NASA launched Landsat 9 from Vandenberg Space Force Base in California on Sept. 27, 2021. Since then, NASA mission engineers and scientists, with USGS collaboration, have been putting the satellite through its paces – steering it into its orbit, calibrating the detectors, and collecting test images. Now fully mission-certified, the satellite is under USGS operational control for the remainder of its mission life.

“Our partnership with NASA over many years has been good for science and good for the American people," said Assistant Secretary for Water and Science Tanya Trujillo. “A half-century archive of Landsat’s Earth observations is a magnificent achievement in the history of science. This fifty-year record gives scientists a consistent baseline that can be used to track climate change and enables them to see changes to the land that might not otherwise be noticed.”

Landsat 9 joined Landsat 8, which has been orbiting since 2013. Together, the two satellites collect images of Earth’s full surface every eight days. USGS specialists collect an average of 740 Landsat 9 scenes every day from around the world to be processed and archived at the USGS Earth Resources Observation and Science Center in Sioux Falls.

Remote-sensing satellites such as Landsat help scientists observe the world using ranges of light beyond the power of human sight to monitor land changes that may have natural or human causes. Landsat is unique because it consistently captures a comprehensive view of Earth at a moderate resolution of approximately 30 meters, the area of a baseball infield. This global view of changes on the land through decades provides an unparalleled perspective for a broad range of data applications in fields such as agriculture, water management, forestry, disaster response, and – crucially – climate change science.

Estimates indicate Landsat provides billions of dollars in value to the U.S. economy each year. Starting in 2008, Landsat images and data became available to the public at no charge. This policy has served to expand applications of Landsat data that enable greater efficiencies for government agencies while creating profitable commercial opportunities for information service industries.

With a data user community that keeps growing, scientists and engineers are already looking forward to the next mission. NASA and USGS are developing options for the next iteration of Landsat, currently called Landsat Next.

The Landsat program has provided continuous global coverage of landscape change since 1972. Landsat’s unique long-term data record provides the basis for a critical understanding of environmental and climate changes occurring in the United States and around the world.

For more information on Landsat 9 and the Landsat program, visit:

https://www.nasa.gov/Landsat
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So the word has been that all the outer engines startup using GSE-supplied fluids. However, obviously there has to be a transition to vehicle-supplied propellants pretty darn quick as the vehicle lifts off.  Today's longer 21 second test is interesting because Elon specifically tweeted that it was a test of autogenous pressurization - which means that after startup, it had to transition cleanly to internal tanks, which then maintained internal tank pressure throughout.

I was thinking of that too.  21 seconds was long enough to start, transition and verify stable operation.  This was a single engine but a big test. 

If the data is good they can start adding more engines.

I'm so excited that we are finally at static fires for the booster.  Who knows how many more we will see, two, three, six or twelve.  We're tantalizing close to launch commit.
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ISS Section / Re: Expedition 67 Thread
« Last post by Rondaz on Today at 09:04 pm »
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General Discussion / Re: Flight crew assignments
« Last post by JoeFromRIUSA on Today at 09:04 pm »
No harm no foul. I thought Victor Glover was a shoo-in to command Artemis 3
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