Live data from Hacker News

Spacex Launch Webcast: Formosat-5 Mission

spacex.com

31–40 of 59 posts

Re: Spacex Launch Webcast: Formosat-5 Mission

#31

Earlier quoted context omitted.

I'd blame your source code more than Jenkins. Our jenkins instance runs our CI in a couple of minutes.

Not everyone is working on projects that are little more than CRUD webapps. I've worked on code that took hours to compile even on beefy machines.

I got a 300k line Java app down to seven and a half minutes including unit and functional tests. What are you working with?

Re: Spacex Launch Webcast: Formosat-5 Mission

#32
post #26

They were supposed to attempt to land/rescue some other part of the rocket this time. There was nothing about it in the webcast.

That'd be the fairing, the 'nosecone' that covers the payload during launch. It wasn't shown in the webcast because it has a low probability of success (they've made several attempts so far with varying degrees of accuracy and damage) and because there's no live feed from the fairing as it descends. The aim is to get it to land in a predetermined spot in the ocean with steerable parafoils, then eventually to stick a…

Didn't one of the mars rovers bring its own bouncy castle? Hollywood has since used that in several movies.

Re: Spacex Launch Webcast: Formosat-5 Mission

#33

They were supposed to attempt to land/rescue some other part of the rocket this time. There was nothing about it in the webcast.

This was apparently a very light payload, so there was lots of room for experimentation - attempts at recovering the fairings, and further speculation at playing with the second stage, and just playing with tolerances and approach angles given sunk cost of the extra launch power. Us fans don't always get to see or hear about those early experiments though.

Re: Spacex Launch Webcast: Formosat-5 Mission

#34
post #31

Earlier quoted context omitted.

Not everyone is working on projects that are little more than CRUD webapps. I've worked on code that took hours to compile even on beefy machines.

I got a 300k line Java app down to seven and a half minutes including unit and functional tests. What are you working with?

Probably a giant C++ codebase. Our CI runs can take well over an hour. C++ compiles so damn slowly compared to Java.

Re: Spacex Launch Webcast: Formosat-5 Mission

#36

Earlier quoted context omitted.

I'd blame your source code more than Jenkins. Our jenkins instance runs our CI in a couple of minutes.

Not everyone is working on projects that are little more than CRUD webapps. I've worked on code that took hours to compile even on beefy machines.

The software analyzes DNA, it's definitely not a webapp

Re: Spacex Launch Webcast: Formosat-5 Mission

#37
post #32
post #26

Earlier quoted context omitted.

That'd be the fairing, the 'nosecone' that covers the payload during launch. It wasn't shown in the webcast because it has a low probability of success (they've made several attempts so far with varying degrees of accuracy and damage) and because there's no live feed from the fairing as it descends. The aim is to get it to land in a predetermined spot in the ocean with steerable parafoils, then eventually to stick a…

Didn't one of the mars rovers bring its own bouncy castle? Hollywood has since used that in several movies.

Yep — Pathfinder and the Mars Exploration Rovers (Spirit & Opportunity) both used airbags. NASA has since switched to the 'sky crane' method for Curiosity and the fortcoming Mars 2020 rover, lowering higher-mass payloads to the ground without contaminating the surface with rocket exhaust (as with Phoenix and the Vikings).

Re: Spacex Launch Webcast: Formosat-5 Mission

#38
post #34
post #31

Earlier quoted context omitted.

I got a 300k line Java app down to seven and a half minutes including unit and functional tests. What are you working with?

Probably a giant C++ codebase. Our CI runs can take well over an hour. C++ compiles so damn slowly compared to Java.

You should probably hire better C++ developers if it takes that long.

Re: Spacex Launch Webcast: Formosat-5 Mission

#40
post #7
post #4

Earlier quoted context omitted.

And as always, the live video feed of the landing was clunky :). They should nail one with a steady stream.

Every time I've watched a landing, the video feed is janky. One might speculate that they don't want to live-stream an embarrassing failure but that seems a bit odd when it would be more embarrassing to have an explosion during launch, losing the payload. Edit: vvvv that sounds quite reasonable, you'd think they'd do something like throw a buoy 100m away to house the actual satellite link and just do wifi from the ba…

Keeping video feed going during the landing is way, way, way, way, way, way down the priority list. The video gets recorded, so they don't need this for analysis. It's purely a promotional thing, which is fun, but saving five seconds of the stream (even if it's an important five seconds) is only worth so much effort.
Post reply on HN