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Space Forum / Shuttle / October 2003Which operating system is used in spacecraft?
Which operating system/systems is currently being used in spacecrafts? Was FlightLinux implemented as the standard? Any information you can provide would be greatly appreciated. Thanks. > Which operating system/systems is currently being used in spacecrafts? Was > FlightLinux implemented as the standard? Any information you can provide > would be greatly appreciated. Thanks. There is as far as I know no "standard". The Shuttle uses HAL/S and I don't think you can really descibe it as having an OS. Many spacecraft have software written directly to the hardware with no intervening OS. >> Which operating system/systems is currently being used in >> spacecrafts? Was FlightLinux implemented as the standard? Any [quoted text clipped - 8 lines] > Many spacecraft have software written directly to the hardware > with no intervening OS. VxWorks is fairly popular as one example of the use of a commercial system. Galileo used a homebrew OS called GRACOS.  Signaturerk, Just an OldEngineer "In God we trust, all others bring data." -- Framed plaque from the '60s, hanging in the Mission Evaluation Room at Johnson Space Center, downstairs from Mission Control. "Greg D. Moore \(Strider\)" <mooregr@greenms.com> wrote in news:BVCjb.34136$Hs.5385@twister.nyroc.rr.com: >> Which operating system/systems is currently being used in >> spacecrafts? [quoted text clipped - 6 lines] > The Shuttle uses HAL/S and I don't think you can really descibe it as > having an OS. The four PASS computers have a primitive OS called GCOS (don't remember what it stands for), mostly written in AP-101S assembly language. I don't think the BFS has an OS per se. SignatureJRF Reply-to address spam-proofed - to reply by E-mail, check "Organization" (I am not assimilated) and think one step ahead of IBM. > The four PASS computers have a primitive OS called GCOS (don't > remember what it stands for), mostly written in AP-101S assembly > language. I don't think the BFS has an OS per se. FCOS - Flight Computer Operating System >> The four PASS computers have a primitive OS called GCOS (don't >> remember what it stands for), mostly written in AP-101S assembly >> language. I don't think the BFS has an OS per se. >> > > FCOS - Flight Computer Operating System Thanks for the correction. SignatureJRF Reply-to address spam-proofed - to reply by E-mail, check "Organization" (I am not assimilated) and think one step ahead of IBM. > The four PASS computers have a primitive OS called GCOS (don't remember > what it stands for), mostly written in AP-101S assembly language. I don't > think the BFS has an OS per se. Is that a relative of the GCOS (derived from "GEC Operating System" IIRC) that used to run on Honeywell large systems? SignatureDave Kenworthy ----------------------------- Changes aren't permanent - but change is! > Is that a relative of the GCOS (derived from "GEC Operating System" IIRC) > that used to run on Honeywell large systems? I guess not, having now read the 'FCOS' correction! SignatureDave Kenworthy ----------------------------- Changes aren't permanent - but change is! >Which operating system/systems is currently being used in spacecrafts? Was >FlightLinux implemented as the standard? Any information you can provide >would be greatly appreciated. Thanks. Most flight computers, like most computers that are not 'general purpose', have something that Linux folks, let alone Windows folks, would not recognize as an OS. D. SignatureThe STS-107 Columbia Loss FAQ can be found at the following URLs: Text-Only Version: http://www.io.com/~o_m/columbia_loss_faq.html Enhanced HTML Version: http://www.io.com/~o_m/columbia_loss_faq_x.html Corrections, comments, and additions should be e-mailed to om@io.com, as well as posted to sci.space.history and sci.space.shuttle for discussion. > Which operating system/systems is currently being used in spacecrafts? Was > FlightLinux implemented as the standard? Any information you can provide > would be greatly appreciated. Thanks. The unmanned missions Mars Pathfinder, Deep Space 1, and Deep Impact use vxWorks. (The first two have already finished. Deep Impact should launch in 14-15 months.) http://www.windriver.com/products/vxworks5/index.html --Bob Werner >Which operating system/systems is currently being used in spacecrafts? Was >FlightLinux implemented as the standard? Any information you can provide >would be greatly appreciated. Thanks. The shuttle carries a number of laptop computers that run on Windows variants (I'm not sure if the latest version is Win98 or Win2k). The ISS uses Solaris, I think. SignatureMichael R. Grabois # http://chili.cjb.net # http://wizardimps.blogspot.com "I'm not dumb. I just have a command of thoroughly useless information." - Calvin and Hobbes "Michael R. Grabois ... change $ to \"s\"" <wizardimp$1@houston.rr.com> wrote: >>Which operating system/systems is currently being used in spacecrafts? Was >>FlightLinux implemented as the standard? Any information you can provide [quoted text clipped - 3 lines] >(I'm not sure if the latest version is Win98 or Win2k). The ISS uses Solaris, I >think. Nit: Those laptops are used *on* spacecraft, not *in* spacecraft, as they are not used for control, but for administrative tasks. D. SignatureThe STS-107 Columbia Loss FAQ can be found at the following URLs: Text-Only Version: http://www.io.com/~o_m/columbia_loss_faq.html Enhanced HTML Version: http://www.io.com/~o_m/columbia_loss_faq_x.html Corrections, comments, and additions should be e-mailed to om@io.com, as well as posted to sci.space.history and sci.space.shuttle for discussion. This might post double, having news server problems... > "Michael R. Grabois ... change $ to \"s\"" ><wizardimp$1@houston.rr.com> wrote: [quoted text clipped - 5 lines] >>The shuttle carries a number of laptop computers that run on Windows >>variants (I'm not sure if the latest version is Win98 or Win2k). Win98SE. > The >>ISS uses Solaris, I think. Nit: Some ISS laptops (PCS) use Solaris, others (SSC) run Windows. At least one of the SSC laptops runs Win2K - it's used as a file server. > Nit: Those laptops are used *on* spacecraft, not *in* spacecraft, as > they are not used for control, but for administrative tasks. Nit to the nit: the ISS PCS laptops *are* used to control the station (not the SSC laptops, which are, as you say, used for administrative tasks). Death of a thousand nits! SignatureJRF Reply-to address spam-proofed - to reply by E-mail, check "Organization" (I am not assimilated) and think one step ahead of IBM. [...] > >>The shuttle carries a number of laptop computers that run on Windows > >>variants (I'm not sure if the latest version is Win98 or Win2k). > > Win98SE. And don't the CDR and PLT use a Solaris OS when doing their landing simulations? > > The > >>ISS uses Solaris, I think. [quoted text clipped - 7 lines] > Nit to the nit: the ISS PCS laptops *are* used to control the station (not > the SSC laptops, which are, as you say, used for administrative tasks). Are these directly controlling subsystems, or passing commands to the *real* control computers? Smart terminals so to speak? /dps > [...] > [quoted text clipped - 6 lines] > And don't the CDR and PLT use a Solaris OS when doing their landing > simulations? I believe so, but it's been so long since I looked at PILOT, I'm not sure any more. >> > The >> >>ISS uses Solaris, I think. [quoted text clipped - 11 lines] > Are these directly controlling subsystems, or passing commands to the > *real* control computers? Smart terminals so to speak? The latter. The low-level control computers are called Multiplexer- Demultiplexers (MDMs). They are 386/486 boxes. No user interface, just a MIL-STD 1553 bus so the PCS laptops can command them. SignatureJRF Reply-to address spam-proofed - to reply by E-mail, check "Organization" (I am not assimilated) and think one step ahead of IBM. >> Are these directly controlling subsystems, or passing commands >> to the *real* control computers? Smart terminals so to speak? [quoted text clipped - 3 lines] > user interface, just a MIL-STD 1553 bus so the PCS laptops can > command them. I had this link handy: 2001: A Space Laptop http://www.spaceref.com/news/viewnews.html?id=213 Signaturerk, Just an OldEngineer "In God we trust, all others bring data." -- Framed plaque from the '60s, hanging in the Mission Evaluation Room at Johnson Space Center, downstairs from Mission Control. Soyuz software is used by the Argon-16 flight computer, first designed in 1973, and first flown in 1980 on Soyuz T-1. I believe the software is now in version 18, build B, but I could be wrong. > "Michael R. Grabois ... change $ to \"s\"" > <wizardimp$1@houston.rr.com> wrote: [quoted text clipped - 9 lines] > Nit: Those laptops are used *on* spacecraft, not *in* spacecraft, as > they are not used for control, but for administrative tasks. Nit: Will the laptops even function on spacecraft, not onboard spacecraft? Signaturehttp://inquisitor.i.am/ | mailto:inquisitor@i.am | Ian Stirling. ---------------------------+-------------------------+-------------------------- "An enemy will usually have three courses open to him. Of these he will select the fourth." -- Helmuth von Moltke > > Nit: Those laptops are used *on* spacecraft, not *in* spacecraft, as > > they are not used for control, but for administrative tasks. > > Nit: Will the laptops even function on spacecraft, not onboard spacecraft? Of course not. Most hard drives require at least a fractional atmosphere in order to keep the heads floating above the drive. Plus, most laptops rely on air cooling, again requiring at least some atmosphere. So most laptops must be IN the spacecraft's pressure vessel when used. Regardless of whether they could function ON the vehicle's exterior, in practice, they're always used IN the vehicle, though not necessarily connected to any of the spacecraft's critical systems (except that one would expect they're at least occasionally drawing power from the spacecraft). But that's picking a little too many tiny nits. --Rich If you go here you will find some details on computers and language used in space shuttle and Apollo :- http://www.hq.nasa.gov/office/pao/History/ap15fj/compessay.htm and http://www.netcomuk.co.uk/~spaceuk/stscpu/stscpu.html http://www.netcomuk.co.uk/~spaceuk/hals/hals.html -- > Which operating system/systems is currently being used in spacecrafts? Was > FlightLinux implemented as the standard? Any information you can provide > would be greatly appreciated. Thanks. |
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