Author Topic: SpaceX Falcon 9 : TESS : April 18, 2018 : Discussion (Read 195937 times)

lonestriker · « **Reply #300 on:** 04/19/2018 12:08 am »

Was it my imagination or was that a longer-than-usual landing burn? I assume they wanted as gentle landing as possible for NASA reuse.

deruch · « **Reply #301 on:** 04/19/2018 12:11 am »

Being only used to GTO launches where the second burn of the upper stage is timed to take place when crossing the equator, the fact that the second burn was so late on this mission was really messing with my head.

mn · « **Reply #302 on:** 04/19/2018 12:22 am »

Quote from: marsbase on 04/18/2018 11:54 pm

Quote from: Marsin2010 on 04/18/2018 11:29 pm
My Launch Central video feed was very fuzzy. The countdown timer and the progress bar text were quite illegible. I reset the feed several times. It would briefly clear up and then go fuzzy again. Whereas my simultaneous NASA TV feed was extremely crisp. I have watched well over 40 Falcon 9 launches and have never had this happen before. Anyone else?

I had the same experience as you including the fact that the countdown timer would clear up briefly each time I reloaded the site and then get fuzzy again. I have not seen this before.

On YouTube it defaults to Auto for quality and for the first time today it was giving me low quality, I switched from Auto to HD and that fixed it for me.

cppetrie · « **Reply #303 on:** 04/19/2018 01:09 am »

Quote from: mn on 04/19/2018 12:22 am

Quote from: marsbase on 04/18/2018 11:54 pm
Quote from: Marsin2010 on 04/18/2018 11:29 pm
My Launch Central video feed was very fuzzy. The countdown timer and the progress bar text were quite illegible. I reset the feed several times. It would briefly clear up and then go fuzzy again. Whereas my simultaneous NASA TV feed was extremely crisp. I have watched well over 40 Falcon 9 launches and have never had this happen before. Anyone else?

I had the same experience as you including the fact that the countdown timer would clear up briefly each time I reloaded the site and then get fuzzy again. I have not seen this before.

On YouTube it defaults to Auto for quality and for the first time today it was giving me low quality, I switched from Auto to HD and that fixed it for me.

Same for me. Auto was junk but manually picking HD worked fine.

Lars-J · « **Reply #304 on:** 04/19/2018 01:15 am »

Quote from: mn on 04/19/2018 12:22 am

Quote from: marsbase on 04/18/2018 11:54 pm
Quote from: Marsin2010 on 04/18/2018 11:29 pm
My Launch Central video feed was very fuzzy. The countdown timer and the progress bar text were quite illegible. I reset the feed several times. It would briefly clear up and then go fuzzy again. Whereas my simultaneous NASA TV feed was extremely crisp. I have watched well over 40 Falcon 9 launches and have never had this happen before. Anyone else?

I had the same experience as you including the fact that the countdown timer would clear up briefly each time I reloaded the site and then get fuzzy again. I have not seen this before.

On YouTube it defaults to Auto for quality and for the first time today it was giving me low quality, I switched from Auto to HD and that fixed it for me.

Same here. It might have been a YouTube or SpaceX stream issue. (or a combination thereof)

Steven Pietrobon · « **Reply #305 on:** 04/19/2018 01:19 am »

Congratulations to SpaceX and NASA for the successful launch!

Rocket Science · « **Reply #306 on:** 04/19/2018 01:21 am »

It was fun to see applause from the TESS control room when the first stage landed on OCISLY...

Lars-J · « **Reply #307 on:** 04/19/2018 01:24 am »

Yep, awesome launch and I'm very excited to see TESS generate data.

Congratulations to NASA and SpaceX!

groundbound · « **Reply #308 on:** 04/19/2018 01:31 am »

Yay!

I just realized that if launches continue at this pace, we are less than a year away from when Falcon 9 has more launches than Atlas 5.

And please do not take this as a knock on A5. It is a fantastic rocket that has been our national workhorse for the better part of 2 decades, which is why I made the comparison.

deruch · « **Reply #309 on:** 04/19/2018 01:32 am »

Quote from: Rocket Science on 04/19/2018 01:21 am

It was fun to see applause from the TESS control room when the first stage landed on OCISLY...

That was at the same time as the second stage shut down (SECO-1), so it's not perfectly clear what they were seeing on their screens and applauding to.

neoforce · « **Reply #310 on:** 04/19/2018 01:32 am »

Is there a published timeline of the burns planned for TESS as it moves toward its final orbit? What’s the best forum here at NSF to follow TESS’ progress as it is now more of a NASA mission than a SpaceX mission.

hplan · « **Reply #311 on:** 04/19/2018 01:35 am »

Quote from: Star One on 04/18/2018 11:06 pm

Quote from: the_other_Doug on 04/18/2018 10:25 pm
I would really like to know how the YouTube app on most devices manages its search results.

On a quite standard YouTube app, I just entered the search phrase SpaceX TESS launch. It showed something like 30 search results -- everything from rebroadcasts of SpaceX's current feed by other websites, to recordings of the 16th's scrub, to Falcon Heavy and BFR simulations -- before it listed SpaceX's own streaming channel for today's launch.

Which was listed as "SpaceX TESS launch". The *exact* text of my search phrase.

You would think high-profile online content management systems like YouTube would understand that we are smart enough to realize that they're giving results that badly fit the search criteria precedence over results which fit them well. That can only mean that, 1) their search function sucks rocks, or 2) they are giving some types of providers precedence, even when their result doesn't really fit. For monetary or other considerations.

You'd be surprised how many people believe it's option number 1... sigh...

Do you think Google are just there to give away content for free. It’s a trade as with so many of these free online services more often you’re trading your data in exchange for the service. I for one don’t begrudge them doing this as they have a business to run, nor the people on there who have to monetise their content as that’s their career. This shouldn’t be an issue provided both parties are aware of this.

Anyway the easy answer is just subscribe to the right channels and they will always jump up your home feed when needed.

Nowadays search results are driven by machine learning and there are literally hundreds of signals factoring into the search result ranking, of which "exact title match" and "URL match" are only two. Others range from popularity and level of engagement of the result page to whether the HTML is valid and the site is mobile friendly. The interesting thing about these ML algorithms is that it's pretty much impossible for humans to understand why results are ranked the way they are other than that it maximizes click-through rate or whatever metric Google is optimizing.

deruch · « **Reply #312 on:** 04/19/2018 02:05 am »

Quote from: neoforce on 04/19/2018 01:32 am

Is there a published timeline of the burns planned for TESS as it moves toward its final orbit? What’s the best forum here at NSF to follow TESS’ progress as it is now more of a NASA mission than a SpaceX mission.

The attached document is a bit out of date as it discussed the burn dates based on a launch in December 2017 or January 2018, but the general plan won't be too different.

gongora · « **Reply #313 on:** 04/19/2018 02:25 am »

Quote from: groundbound on 04/19/2018 01:31 am

Yay!

I just realized that if launches continue at this pace, we are less than a year away from when Falcon 9 has more launches than Atlas 5.

Maybe just under a year from when Falcon 9 has more launches than Atlas V has today.

Oersted · « **Reply #314 on:** 04/19/2018 02:33 am »

This may be Day One of a mission that will give us a first look at an exoplanet that harbours life.

wannamoonbase · « **Reply #315 on:** 04/19/2018 03:29 am »

Quote from: gongora on 04/19/2018 02:25 am

Quote from: groundbound on 04/19/2018 01:31 am
Yay!

I just realized that if launches continue at this pace, we are less than a year away from when Falcon 9 has more launches than Atlas 5.

Maybe just under a year from when Falcon 9 has more launches than Atlas V has today.

Then 2 months later more than the total Atlas V launches.

SpaceX had years of lofty goals and big promises, but they are starting to deliver on those. Very exciting.

rickl · « **Reply #316 on:** 04/19/2018 05:56 am »

Congratulations to NASA and SpaceX! Do we know how well they met the target orbit?

rickl · « **Reply #317 on:** 04/19/2018 06:17 am »

Quote from: Oersted on 04/19/2018 02:33 am

This may be Day One of a mission that will give us a first look at an exoplanet that harbours life.

Someday, if and when we develop the technology for interstellar travel, our first destinations may be planets that are discovered by TESS.

Jakusb · « **Reply #318 on:** 04/19/2018 07:22 am »

Congrats to SpaceX and NASA!
What an amazing launch!
Unbelievable how easy they make it seem.

Todo: Fix that ASDS video feed thingy.

AncientU · « **Reply #319 on:** 04/19/2018 12:36 pm »

Quote from: groundbound on 04/19/2018 01:31 am

Yay!

I just realized that if launches continue at this pace, we are less than a year away from when Falcon 9 has more launches than Atlas 5.

And please do not take this as a knock on A5. It is a fantastic rocket that has been our national workhorse for the better part of 2 decades, which is why I made the comparison.

Both Atlas V and Ariane 5 will be passed in 1Q 2019 if manifests are flown as posted. Both will retire with near-perfect records a couple years later, done in by their high costs.