SpaceX nails triple booster landing after satellite delivery

#1

Post by support_ribbons » Fri, Apr 12, 2019, 11:13 AM UTC

SpaceX nails triple booster landing after satellite delivery
bbc.com

Re: SpaceX nails triple booster landing after satellite delivery

#2

Post by raehik » Fri, Apr 12, 2019, 11:25 AM UTC

Big fan of making technical spacecraft manoeuvres sound like cool skateboard tricks.

Re: SpaceX nails triple booster landing after satellite delivery

#3

Post by trollied » Fri, Apr 12, 2019, 11:41 AM UTC

raehik wrote: post #2

Big fan of making technical spacecraft manoeuvres sound like cool skateboard tricks.

I'm more impressed by the booster landings though :-)

Seeing a launch/landing in-person is on my bucket list.

Re: SpaceX nails triple booster landing after satellite delivery

#4

Post by Timpy » Fri, Apr 12, 2019, 11:42 AM UTC

The way the text appears with a downward-drawing red line really steals my attention. There are rockets on screen and I kept having my eyes avert to the fragmented text in the bottom left corner. I had to watch the video twice to keep my eyes on the rockets. I'm thinking of the UI/UX implications, subtle and effective.

Re: SpaceX nails triple booster landing after satellite delivery

#5

Post by usermac » Fri, Apr 12, 2019, 11:47 AM UTC

I wonder what emergency procedure is in place in case the landing is off-course. Does it blow itself up?

Re: SpaceX nails triple booster landing after satellite delivery

#6

Post by plutonorm » Fri, Apr 12, 2019, 11:48 AM UTC

I wonder how they do the booster landings?

Is it precise modelling and standard control algorithms, or something more exotic like neural networks?

Re: SpaceX nails triple booster landing after satellite delivery

#7

Post by andrewcchen » Fri, Apr 12, 2019, 11:51 AM UTC

usermac wrote: post #5

I wonder what emergency procedure is in place in case the landing is off-course. Does it blow itself up?

The booster's trajectory targets offshore or away from droneship in case landing burn fails. The landing burn brings the booster onto the landing pad. See CRS-16 where the booster landed in the water when the booster lost roll control when the grid fins failed.

Re: SpaceX nails triple booster landing after satellite delivery

#8

Post by sonium » Fri, Apr 12, 2019, 11:52 AM UTC

plutonorm wrote: post #6

I wonder how they do the booster landings? Is it precise modelling and standard control algorithms, or something more exotic like neural networks?

It's done using convex optimization

https://www.nap.edu/read/23659/chapter/10#39

Re: SpaceX nails triple booster landing after satellite delivery

#9

Post by senko » Fri, Apr 12, 2019, 11:52 AM UTC

Timpy wrote: post #4

The way the text appears with a downward-drawing red line really steals my attention. There are rockets on screen and I kept having my eyes avert to the fragmented text in the bottom left corner. I had to watch the video twice to keep my eyes on the rockets. I'm thinking of the UI/UX implications, subtle and effective.

It's just a newsflash, the rockets themselves are a backdrop.

For the real thing, watch the SpaceX video directly from YouTube: https://youtu.be/TXMGu2d8c8g?t=1181

Re: SpaceX nails triple booster landing after satellite delivery

#10

Post by sgt » Fri, Apr 12, 2019, 11:52 AM UTC

Timpy wrote: post #4

The way the text appears with a downward-drawing red line really steals my attention. There are rockets on screen and I kept having my eyes avert to the fragmented text in the bottom left corner. I had to watch the video twice to keep my eyes on the rockets. I'm thinking of the UI/UX implications, subtle and effective.

Write them an angry letter.