Feeds

Atlantis computer goes down: Fixed by 'nauts

Space pilots turn hands to a bit of zero-G sysadmin work

SANS - Survey on application security programs

Commander Chris Ferguson and pilot Doug Hurley have fixed space shuttle Atlantis' General Purpose Computer (GPC) 4, which clapped out last night requiring transfer of its duties to another of the shuttle's quintet of GPCs.

The pair have reloaded software into the unit and it has "been added to the common set of GPCs and is operating normally, processing data".

NASA elaborates: "Mission Control is evaluating the 'dump' of data from the computer that Atlantis transmitted earlier this morning to determine what caused the Thursday evening failure. GPCs 1, 2 & 4 are in 'run' and GPC 3 is in 'standby'. All four of the primary computers are processing data."

A space shuttle GPC. Pic: NASAThe agency describes the GPC (pictured) as "slow" and packing "little memory compared to modern home computers", specifically "a storage capacity of one megabyte". It "runs at a speed of 1.4 million instructions per second". However, NASA does quite reasonably note that "no one straps the latest-and-greatest desktop computer inside a machine that vibrates like an old truck on a washboard road while requiring it to get a spacecraft into orbit and back safely".

The GPCs' software is similarly lean and robust. NASA says: "The shuttle's primary flight software contains about 400,000 lines of code. For comparison, a Windows operating system package includes millions of lines of source code."

This modest package processes data from the shuttle's "myriad sensors" via 24 input/output links, subjecting them to "elaborate mathematical algorithms to determine when to swivel the three main engines during launch, how much to move the elevons on the wings for landing, and which thrusters to fire in space to set up a rendezvous with the International Space Station, for example".

NASA has lots more on the GPCs here. The latest from Atlantis' STS-135 mission is here. ®

Top three mobile application threats

More from The Register

next story
Red-faced LOHAN team 'fesses up in blown SPEARS fuse fiasco
Standing in the corner, big pointy 'D' hats
KILLER SPONGES menacing California coastline
Surfers are safe, crustaceans less so
LOHAN's Punch and Judy show relaunches Thursday
Weather looking good for second pop at test flights
Discovery time for 200m WONDER MATERIALS shaved from 4 MILLENNIA... to 4 years
Alloy, Alloy: Boffins in speed-classification breakthrough
Curiosity finds not-very-Australian-shaped rock on Mars
File under 'messianic pastries' and move on, people
Elon Musk's LEAKY THRUSTER gas stalls Space Station supply run
Helium seeps from Falcon 9 first stage, delays new legs for NASA robonaut
Top Secret US payload launched into space successfully
Clandestine NRO spacecraft sets off on its unknown mission
New FEMTO-MOON sighted BIRTHING from Saturn's RING
Icy 'Peggy' looks to be leaving the outer rings
Melting permafrost switches to nasty, high-gear methane release
Result? 'Way more carbon being released into the atmosphere as methane'
prev story

Whitepapers

Designing a defence for mobile apps
In this whitepaper learn the various considerations for defending mobile applications; from the mobile application architecture itself to the myriad testing technologies needed to properly assess mobile applications risk.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.