SpaceX Falcon 9/Dragon COTS Demo (C2+) PRE LAUNCH UPDATES

[Micahgtb]

SpaceX ‏ @SpaceX 
Our launch is likely to be pushed back by one week to do more testing on Dragon docking code, pending coordination with @NASA.
 
Elon Musk
‏ @elonmusk  Reply  Retweet  Favorite · Open
Am pushing launch back approx a week to do more testing on Dragon docking code. New date pending coordination with @NASA.

Are these missteps in grammar and referring to the code needed for berthing? Because I don't see NASA letting jump that far ahead, thoughts?

[Chris Bergin]

He's right. Sure, they have to pass C2 objectives before being allowed to go to the C3 (C2+ combined) steps of the mission, but if all goes well they will go for berthing and thus they need to have all that ready if they get that far.

[Chris Bergin]

Article on the slip and launch date evaluations - and processing etc. Will give it a standalone thread, as this thread is moving fast.

SpaceX, NASA looking for new Falcon 9 launch date following slip
http://www.nasaspaceflight.com/2012/04/spacexnasa-new-falcon-9-launch-date-slip/

[Space Pete]

Elon Musk
‏ @elonmusk  Reply  Retweet  Favorite · Open
Am pushing launch back approx a week to do more testing on Dragon docking code. New date pending coordination with @NASA.

I can't believe even Elon Musk wrote "docking". It's berthing. Ber-thing.

[antiquark]

BTW, out of curiosity, does anyone know what programming language and operating system they're using for the docking code?

[kch]

Elon Musk
‏ @elonmusk  Reply  Retweet  Favorite · Open
Am pushing launch back approx a week to do more testing on Dragon docking code. New date pending coordination with @NASA.

I can't believe even Elon Musk wrote "docking". It's berthing. Ber-thing.

You may have found the problem ...

[Chris Bergin]

For months I have thought over signing up to support the site, as the advertising revenues have deiced over the past few years. Thank you Mr. Bergin and the contributors, for enhancing the image and quality of NSF, to create one of the finest discussion forums on the Internet.
- Chris

The comments on the last page were very compiling, you really should sign up. 

Ooo, I missed this one. Thanks very much for the kind words - and you're support - it really mean a lot!

[Antares]

BTW, out of curiosity, does anyone know what programming language and operating system they're using for the docking code?

C++, which was not a language the NASA group reviewing the code was versed in.    Seriously.

[Mike_1179]

BTW, out of curiosity, does anyone know what programming language and operating system they're using for the docking code?

C++, which was not a language the NASA group reviewing the code was versed in.    Seriously.

Which begs the question, what languages are they versed in?  FORTRAN? Perl?

[starsilk]

BTW, out of curiosity, does anyone know what programming language and operating system they're using for the docking code?

C++, which was not a language the NASA group reviewing the code was versed in.    Seriously.

Which begs the question, what languages are they versed in?  FORTRAN? Perl?

likely Ada.

[Chris-A]

BTW, out of curiosity, does anyone know what programming language and operating system they're using for the docking code?

C++, which was not a language the NASA group reviewing the code was versed in.    Seriously.

Interesting, C/C++ is the most commonly used language out there.
I believe from others here they use VxWorks and Linux, but citation is needed.

[savuporo]

BTW, out of curiosity, does anyone know what programming language and operating system they're using for the docking code?

C++, which was not a language the NASA group reviewing the code was versed in.    Seriously.

Right. Why would they be ...

[Chris Bergin]

It's relevant to the launch delay, but there's potential this could turn into three pages about software lanuage, and that's going to be a bit sleepy, so carry on for now, but if it does turn into multiple pages, we'll split and start a new thread specific to it.

[yg1968]

Here's the archive of the post FRR presser:

http://www.ustream.tv/recorded/21900888

starts 37 minutes in. Finishes in this one:

http://www.ustream.tv/recorded/21902433

Here are the same post FRR presser archived videos on NASA's commercial space transportation website:
http://www.nasa.gov/multimedia/videogallery/index.html?media_id=140932901
http://www.nasa.gov/multimedia/videogallery/index.html?media_id=140937881

[Chris Bergin]

Or John 44, or youtube too!

[yg1968]

OK, thanks. Even better.

[ChrisC]

Just to be clear, because it's not obvious if you're reading this thread on a mobile device, the videos spoken of above are the post FRR *briefing*, not the FRR itself.  You all got me pretty excited there for a second.

Thanks Chris B. for software discussion warning.  As soon as that started, I thought, "aw geez, this is the kind of thing that everybody is going to have a [banal] opinion on, here comes 5 pages of armchair generalizing"   Please take it elsewhere and keep this thread for updates!

[Chris Bergin]

Edited in "post FRR presser" into the above.

[Lurker Steve]

BTW, out of curiosity, does anyone know what programming language and operating system they're using for the docking code?

C++, which was not a language the NASA group reviewing the code was versed in.    Seriously.

Which begs the question, what languages are they versed in?  FORTRAN? Perl?

Is it really NASA's job to perform code reviews ? If NASA is that heavily immersed into the development process at SpaceX, there is a problem. NASA should only  need to make sure that the code was actually reviewed by a team at SpaceX, and that the proper testing processes were in place, and followed. Maybe they look at the documentation from the code reviews and testing process, but no way are they performing code inspections.

[Jim]

Is it really NASA's job to perform code reviews ? If NASA is that heavily immersed into the development process at SpaceX, there is a problem. NASA should only  need to make sure that the code was actually reviewed by a team at SpaceX, and that the proper testing processes were in place, and followed. Maybe they look at the documentation from the code reviews and testing process, but no way are they performing code inspections.

Yes, it is.
Has Spacex ever approach another vehicle before?
It is not launch vehicle code, but the visiting vehicle code

Also, Spacex may have invited them.

NASA has found code problems on other commercial vehicles before.