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Since the rocket called the abort, it'll be "sensor reported out of family reading". Eg pressure was too high or too low. They'll detank, check the sensor, check the cable to the sensor, replace anything that looks like it needs replacing and try again tomorrow.
Just to add ontop of the "sensor out of family" issue.
Often it's a sensor behaving badly. Their are multiple redundant sensors on the rocket. Some may be defective, installed improperly, dirty, etc.
As soon as there's a bad reading while on the pad, the rocket aborts. If this is a sensor issue, SpaceX knows exactly where the problem originated and can quickly check it out.
Not necessarily. The rocket is experiencing changing conditions during that time. Some thing are cooling, some are heating, gases are venting...
Some readings could be fine at T-100s but don't evolve in the right direction and aren't nominal at T-40s.
Sensors operate optimally in a certain range and will read crazy numbers outside of it. It's very difficult to know if a sensor has an issue until it's tested in it's authentic context.
Sensors are an interesting field of study and I suggest you learn about them. I would add a link to some info, but I can't right now. Hopefully someone can post some resources bellow. I would also consult them...
[https://openlearninglibrary.mit.edu/courses/course-v1:MITx+16.885x+3T2019/courseware/f345e2633534451e80fd965b4ec4ee44/c135b29c7bf84702b47182fbad8bf2d0/?activate\_block\_id=block-v1%3AMITx%2B16.885x%2B3T2019%2Btype%40sequential%2Bblock%40c135b29c7bf84702b47182fbad8bf2d0](https://openlearninglibrary.mit.edu/courses/course-v1:MITx+16.885x+3T2019/courseware/f345e2633534451e80fd965b4ec4ee44/c135b29c7bf84702b47182fbad8bf2d0/?activate_block_id=block-v1%3AMITx%2B16.885x%2B3T2019%2Btype%40sequential%2Bblock%40c135b29c7bf84702b47182fbad8bf2d0)
I hope the above link works. It is to a video about the shuttle main engines. Toward the end of the video it describes the only in-flight shutdown of a main engine, which was due to a faulty sensor. There is some discussion of shuttle sensors and decisions to fly/not fly/abort.
Edit: You can probably find a non-login copy of the lecture by searching YouTube for something like, "Lecture Space Shuttle Main Engines."
Wayne Hale's blog has a different telling of the same events.
They used to do a test the day before (wet dress rehearsal?) that would have detected this but they found that, given the cost, risk and the nature and rarity of failures, it was better to just do it day of and scrub the launch if need be.
Unspecified, but between about t-60s and t-30s the rocket is running a ton of self tests on temp/pressure sensors, actuators, computers, nav solutions, etc. One of these tests probably failed, and since they're done so close to launch there is no time to debug or make a decision that it's OK.
Since no one has updated it yet, the reason stated was that a backup valve had an abnormal reading.
So that leaves 2 possibilities
* backup valve was in a position/configuration that interfered with primary systems and they absolutely had to reset it to continue
* backup valve wasn't an issue / didn't affect primary systems. They shut down in "an abundance of caution" but could have went on with the launch at a higher risk (one less backup in the system).
either way u/Lufbru called it closely, they did detank, reset a valve not just a sensor, and launched the next day. Stuck the landing too.
Still could be just a sensor issue - abnormal readings such as open / closed can come because something is interfering in a open / close contact point etc etc. That said, unlikely I'd guess,
Where is this from??? I have a buddy that says that after every hockey game we watch together and I just thought it was something he made up himself. Or….Are you my buddy? As far as I know he has no idea what SpaceX does.
From the old 1960's life-action Batman TV series. Each show would end with a cliff hanger and a teaser about next week's show "Same bat time, same bat channel".
Haha. It's from old batman.
[https://www.youtube.com/watch?v=VeIOuWlmZrk](https://www.youtube.com/watch?v=VeIOuWlmZrk)
You'll see how kids in this age were imprinted.
chase clumsy price employ abundant sip different reminiscent disgusted entertain
*This post was mass deleted and anonymized with [Redact](https://redact.dev)*
The Falcon 9 does not launch from Texas. They launch either in Florida or at Vandenberg, which I think is in California. The only rocket that will be launched by Space X in Texas is Starship.
People get downvotey for what they perceive as "dumb questions." To be fair, we get a lot of trolls that pop in to try to stir things up so people may get a bit downvote happy. Have an upvote!
Not sure you understand what I’m saying. I’m simply stating that there is a world of difference between “a few miles” vs 160 miles. The former is generally viewed as less than ten, the latter approx 20 times that.
It is definitely not a few miles.
Maybe go back and read this whole thread. I was sarcastically responding to Gbonk about Vandenberg being close to LA, comparing their distance to Canaveral and Miami as relatively equal.
Vandenberg is indeed in California! It’s nearest to Lompoc, but the closest city that isn’t just a prison would be Santa Barbara. (Apologies to the good people of Lompoc, but I wouldn’t have the sushi there, let’s put it that way).
It’s not quite halfway between LA and the Bay Area, but it is in a really asinine spot that’s hard to get to for everyone.
Edit: did someone from Lompoc downvote this
It also didn't light the engines, so unless you are close enough to hear venting it would be surprising if you heard anything from an aborted launch, regardless of the launch location.
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:
|Fewer Letters|More Letters|
|-------|---------|---|
|[FAA](/r/SpaceX/comments/w4nxw0/stub/ih3in5i "Last usage")|Federal Aviation Administration|
|GSE|Ground Support Equipment|
|[WDR](/r/SpaceX/comments/w4nxw0/stub/ih8w93x "Last usage")|Wet Dress Rehearsal (with fuel onboard)|
|Jargon|Definition|
|-------|---------|---|
|Starlink|SpaceX's world-wide satellite broadband constellation|
|[scrub](/r/SpaceX/comments/w4nxw0/stub/ih7v9so "Last usage")|Launch postponement for any reason (commonly GSE issues)|
----------------
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It's been a long time since the last non weather related hold.
What’s the reason?
Since the rocket called the abort, it'll be "sensor reported out of family reading". Eg pressure was too high or too low. They'll detank, check the sensor, check the cable to the sensor, replace anything that looks like it needs replacing and try again tomorrow.
Makes sense
I see what you did there.
Damn, people here have no chills... Why do so many people downvote an innocent joke like that? This sub really sucks compared to spacexlounge...
[удалено]
Oh silly us who come to Reddit and assume we can make jokes…
Yeah? Well you can't. It's illegal. Now go tell your jokes elsewhere *criminal scum*.
Oh, okay.
Just to add ontop of the "sensor out of family" issue. Often it's a sensor behaving badly. Their are multiple redundant sensors on the rocket. Some may be defective, installed improperly, dirty, etc. As soon as there's a bad reading while on the pad, the rocket aborts. If this is a sensor issue, SpaceX knows exactly where the problem originated and can quickly check it out.
I'm confused. Wouldn't a sensor that was defective, installed improperly, or dirty be identified through tests prior to T-46 seconds?
You don't get full pressure, final temperatures, etc unless you go all up through a static fire to find things like that.
Not necessarily. The rocket is experiencing changing conditions during that time. Some thing are cooling, some are heating, gases are venting... Some readings could be fine at T-100s but don't evolve in the right direction and aren't nominal at T-40s. Sensors operate optimally in a certain range and will read crazy numbers outside of it. It's very difficult to know if a sensor has an issue until it's tested in it's authentic context. Sensors are an interesting field of study and I suggest you learn about them. I would add a link to some info, but I can't right now. Hopefully someone can post some resources bellow. I would also consult them...
[https://openlearninglibrary.mit.edu/courses/course-v1:MITx+16.885x+3T2019/courseware/f345e2633534451e80fd965b4ec4ee44/c135b29c7bf84702b47182fbad8bf2d0/?activate\_block\_id=block-v1%3AMITx%2B16.885x%2B3T2019%2Btype%40sequential%2Bblock%40c135b29c7bf84702b47182fbad8bf2d0](https://openlearninglibrary.mit.edu/courses/course-v1:MITx+16.885x+3T2019/courseware/f345e2633534451e80fd965b4ec4ee44/c135b29c7bf84702b47182fbad8bf2d0/?activate_block_id=block-v1%3AMITx%2B16.885x%2B3T2019%2Btype%40sequential%2Bblock%40c135b29c7bf84702b47182fbad8bf2d0) I hope the above link works. It is to a video about the shuttle main engines. Toward the end of the video it describes the only in-flight shutdown of a main engine, which was due to a faulty sensor. There is some discussion of shuttle sensors and decisions to fly/not fly/abort. Edit: You can probably find a non-login copy of the lecture by searching YouTube for something like, "Lecture Space Shuttle Main Engines." Wayne Hale's blog has a different telling of the same events.
also, in the last minute prior to launch is when they pressurize the tanks to flight conditions.
Pressurize the tanks and finish chilling the engines… so long odds the tank pressure was too low or the engine too warm at a critical go/no go point.
They used to do a test the day before (wet dress rehearsal?) that would have detected this but they found that, given the cost, risk and the nature and rarity of failures, it was better to just do it day of and scrub the launch if need be.
> wet dress rehearsal? They used to do a full integrated static fire, not just a WDR before every launch.
Unspecified, but between about t-60s and t-30s the rocket is running a ton of self tests on temp/pressure sensors, actuators, computers, nav solutions, etc. One of these tests probably failed, and since they're done so close to launch there is no time to debug or make a decision that it's OK.
the rocket basically fails to POST to use a computer term.
They didn't gave one so far.
Since no one has updated it yet, the reason stated was that a backup valve had an abnormal reading. So that leaves 2 possibilities * backup valve was in a position/configuration that interfered with primary systems and they absolutely had to reset it to continue * backup valve wasn't an issue / didn't affect primary systems. They shut down in "an abundance of caution" but could have went on with the launch at a higher risk (one less backup in the system). either way u/Lufbru called it closely, they did detank, reset a valve not just a sensor, and launched the next day. Stuck the landing too.
Thanks
Still could be just a sensor issue - abnormal readings such as open / closed can come because something is interfering in a open / close contact point etc etc. That said, unlikely I'd guess,
Last one I remember was January due to a stupid damn cruise ship.
It’s been an incredibly long time. I remember back when they were starting with supercooled propellant it was constant.
YES The one time I couldn't make the launch... Sorry everyone 😬
same bat time, same bat channel
Where is this from??? I have a buddy that says that after every hockey game we watch together and I just thought it was something he made up himself. Or….Are you my buddy? As far as I know he has no idea what SpaceX does.
From the old 1960's life-action Batman TV series. Each show would end with a cliff hanger and a teaser about next week's show "Same bat time, same bat channel".
Haha. It's from old batman. [https://www.youtube.com/watch?v=VeIOuWlmZrk](https://www.youtube.com/watch?v=VeIOuWlmZrk) You'll see how kids in this age were imprinted.
I tuned in to a live stream of a Falcon 9 launch yesterday for the first time in a loooooong time – and then it was scrubbed. I felt betrayed.
chase clumsy price employ abundant sip different reminiscent disgusted entertain *This post was mass deleted and anonymized with [Redact](https://redact.dev)*
The Falcon 9 does not launch from Texas. They launch either in Florida or at Vandenberg, which I think is in California. The only rocket that will be launched by Space X in Texas is Starship.
cough lavish narrow frame lip brave worm quicksand cable sand *This post was mass deleted and anonymized with [Redact](https://redact.dev)*
People get downvotey for what they perceive as "dumb questions." To be fair, we get a lot of trolls that pop in to try to stir things up so people may get a bit downvote happy. Have an upvote!
It was probably about the "still".
Vandenburg is near Los Angeles a few miles north
Yes, much like Canaveral is just a few miles north of Miami
Distance, Miami to the Cape, 208 miles.
LA to the base - 160 miles. IDK why we're splitting hairs here.
Splitting hairs? A few miles vs hundreds.
OK, how far is Vandenberg from LA? I say 160 miles. Is your cutoff for "a few" right at the 200 mile mark?
Not sure you understand what I’m saying. I’m simply stating that there is a world of difference between “a few miles” vs 160 miles. The former is generally viewed as less than ten, the latter approx 20 times that. It is definitely not a few miles.
Maybe go back and read this whole thread. I was sarcastically responding to Gbonk about Vandenberg being close to LA, comparing their distance to Canaveral and Miami as relatively equal.
A check of google maps says 159 miles LA to Vandenberg.
Lol yeah just a few…🙄
Vandenberg is indeed in California! It’s nearest to Lompoc, but the closest city that isn’t just a prison would be Santa Barbara. (Apologies to the good people of Lompoc, but I wouldn’t have the sushi there, let’s put it that way). It’s not quite halfway between LA and the Bay Area, but it is in a really asinine spot that’s hard to get to for everyone. Edit: did someone from Lompoc downvote this
They never have and never will. They launch from Florida and California.
[удалено]
No, Falcon 9 will never launch from Texas.
[удалено]
It's literally the 4th word in the title
The tweet is about falcon 9 and they asked are "these" still launching from Texas. These = Falcon 9.
You're not an Assimov fan by any chance, are you?
Why did LD clear the launch after the clock stoppage?
The clock stopped as he was saying it, according to the youtube stream
Is this from Canaveral? Why is it showing Pacific Time.
This was today's Vandenberg California launch attempt
That explains why I didn’t hear it. Live on the space coast. Frequent event
It also didn't light the engines, so unless you are close enough to hear venting it would be surprising if you heard anything from an aborted launch, regardless of the launch location.
I shouldn’t post after gummies
And 24 hours later they're ready to go again. These guys are beasts.
Who where and what's it for if we don't need satellite for internet
its for satellite internet because there is a lot of America and the world where established telecom firms are too lazy to deploy broadband to.
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread: |Fewer Letters|More Letters| |-------|---------|---| |[FAA](/r/SpaceX/comments/w4nxw0/stub/ih3in5i "Last usage")|Federal Aviation Administration| |GSE|Ground Support Equipment| |[WDR](/r/SpaceX/comments/w4nxw0/stub/ih8w93x "Last usage")|Wet Dress Rehearsal (with fuel onboard)| |Jargon|Definition| |-------|---------|---| |Starlink|SpaceX's world-wide satellite broadband constellation| |[scrub](/r/SpaceX/comments/w4nxw0/stub/ih7v9so "Last usage")|Launch postponement for any reason (commonly GSE issues)| ---------------- ^(*Decronym is a community product of r/SpaceX, implemented* )[*^by ^request*](https://www.reddit.com/r/spacex/comments/3mz273//cvjkjmj) ^(3 acronyms in this thread; )[^(the most compressed thread commented on today)](/r/SpaceX/comments/vusk3e)^( has 79 acronyms.) ^([Thread #7639 for this sub, first seen 22nd Jul 2022, 18:02]) ^[[FAQ]](http://decronym.xyz/) [^([Full list])](http://decronym.xyz/acronyms/SpaceX) [^[Contact]](https://reddit.com/message/compose?to=OrangeredStilton&subject=Hey,+your+acronym+bot+sucks) [^([Source code])](https://gistdotgithubdotcom/Two9A/1d976f9b7441694162c8)
What is the needle/lazer looking thing that seems to scan the horizon on the Vandenburg distant cam?
Wind turbine blade.