United States, Bach, Isotope Thermo Electric Generators discussed on TechStuff



Never actually look more into it. Because I was lucky that I could say it. There's an infrared interferometer spectrometer. And Optical calibration targeting system, a planetary radio astronomy and plasma wave antenna, each spacecraft's two of those and also as the planetary radio astronomy instrument or Has the a plasma instrument. Voyager one's plasma instrument is nonfunctional, but all other instruments are in working order and boys. You're too is still collecting data through its plasma instruments It's got. It also gets power from three Isotope Thermo Electric Generators, and currently it gets about three hundred and fifteen watts of power now the spacecraft designed so that all of their systems can operate at four hundred watts of power. Okay, so it's able to It's still getting power, but it's not enough power to operate everything, and in fact they designed the voyager spacecraft with this in mind, the idea being that as the power as the power supply begins to decrease, it begins to shutdown unnecessary, says instruments. So originally. There were eleven different. Projects that were involved in gathering data from the Voyager's systems and processing that data here on earth. There were eleven of them currently, only five of them are still in operation because the other systems have been progressively shut down to make sure that the voyager spacecraft can still send us information, and like you said by twenty, twenty or twenty five or so. That's when we expect. Expect the power to have run down enough where we're not going to be able to get any more information from them, because it's just not going to have the power necessary to broadcast right right well, because the way that this engine of sorts works, is that appellative plutonium dioxide released heat through their own natural decay processes, and so once they have finished a king. That's it. Yeah. That's true and then I'll I forgot. Magnetometer boom which designed tests to measure magnetic fields, so that was one of those things we didn't really know a lot about the magnetic field to the outer planets before we sent these these spacecraft up. That's one of the really huge as sources of information that it is. Yeah and so then it has a flight data subsystem, which handles all the information, and it has an eight track digital tape recorder. So you've got an eight track up there. It's a it to the FTSE configures controls collects data from the various instruments and the tape recorder handles the data from the plasma wave subsystem, because that's the one that gets the highest density of data and the shortest amount of time, so the data tape recorder was the cutting edge technology to handle that that information and according to NASA. The tape in the digital recorder won't wear out until the tape has moved back and forth through a distance that is equivalent to the width of the United. States that is not. Not Terribly, precise because the United States is not a perfect rectangle, but in general I would say that's probably about three thousand miles, which is around four thousand eight hundred kilometers I assume they mean is that it's doing fine. Yeah, so what they're saying is that that tape is capable of traveling that collective amount of distance about breaking right, so you got to remember the tape. itself is not that long. It's just saying that they would you'll by the time you would go through all this tape and his worn out. You could have gone all the way across. The United States using that same distance of taping played through. Just kind of that's impressive that has a command computer subsystem which provides sequencing and control functions, which includes fault detection, corrective routines, antenna, pointing data and spacecrafts sequencing data. The detection involves seven top level fault, protection routines, and each one is able to detect and correct for several possible failures. Oh, basically it just means that there's the computer has multiple modules, and they compare data back and forth between each other, and it will decide if one module is different from the others that that one's faulty and to cut it out system. And it also means that the space craft capable of shutting down systems if it needs to automatically autonomously, because which is important, because we can't broadcast to these things they broadcast to us. They don't have receivers though their antenna could receive information, thank yeah, but it means that it would take seventeen hours for the information to get to us in seventeen hours for the freshly of back, and by then whatever the problem was is probably not the biggest issue at that point right, so yeah. It's important to have something to connect autonomously. If if you if the communication is a barrier, same sort of thing with the the curiosity rover when it was landing on the surface of Mars, you know a lot of that landing. In fact, all of the landing was autonomous because there was no time for us to send any adjustments to the system. It's like you're on your own. Yeah, by the time we. We would be able to send adjustment. It would have already either crashed or landed safely, so you had to design a spacecraft that could do this or else. It wouldn't work pretty impressive in the nineteen seventies for for the amount of computing power that what's going Oh. Yeah, definitely, and it also had an attitude, art or still hassle I. Don't know why I'm using the past tense still up dead to you. The attitude and articulation control subsystem, which is also known acs it's in charge of maintaining the spacecraft orientation in positions the scan platform. This is what we're talking about. The system that's that's in charge of making sure that data antennas pointed back at Earth, and also that the scan platform, which is really you know the instrumentation panel? Is pointed in the right direction to get the data the needs. And the. It's yeah. It's a three axis stabilization system and use the celestial, or Giro referenced attitude control to make the high gain antenna point back to Earth now we talked about the fact that there is an interesting gold plated copper disc on board each of the two voyager spacecraft. The golden records there for. So this This was a really cool idea you know. Who of course was the chairman for this Carl? Sagan yes, he he had billions and billions of suggestions, but not all of them can make it onto the desk, obvious right, and and these are these are these these goldplated copies engraved like vinyl records? Yeah, yeah, and kids. Ask Your parents. Oh dear, no, no kids are hipsters. These days. We know things final. It's cool kids, 'til your older siblings because they they've missed out on the HIPSTER generation right? I'm not all right, so so yeah, you're talking about a desk. Vast physical grooves that are in it that can be read using a stylus and country, which which were included the they included the cartridge and stylus did not include a turntable. So aliens aliens work it out. They have to build it, but they did leave instructions written in a symbolic language to say here's how you would construct something that would be able to play these things right now. They were there twelve inches in diameter, and they are designed to be played back at sixteen and two-thirds revolutions per minute. So actually fairly slowly i. mean you re thinking about the? The, Forty five or thirty three revolutions per minute for for your average albums, and this is a six hundred two thirds so. on these golden records are lots and lots of stuff actually. It's including things like greetings from five different languages, including some that aren't being used anymore did not been used in a very long time. which is a Sumerian language which was last used around four thousand. Selection of nature sounds Yup, so if you ever wanted to hear what frogs burping sounded like, and you are from some distant planet. Here's an opportunity to. Share. Your for Ford Prefect and you're on your way to Earth. This is a good way to do some homework before you get there. A lot of traditional music, some native American chance and Scottish Bagpipes talk about some of the music was on here. For African ritual music there's a bunch of classical music and so. I wrote down some of my favorites. This is this is obviously. There are lots and lots of musical tracks on the records. These are just the ones that I personally wrote down because I I they resonate with me, It's not to say that the other ones are not anti sense. Familiar with some of them but there's the Brandenburg Concerto number two F. actually it's just the first movement that's by a guy named Bob Batch. Johan batch wrote that. If I'd he's just some dude really. Yeah obviously Bach's Brandenburg Concerto number two enough Then there's a melancholy blues which was performed by Louis Armstrong Stravinsky's. The rite of spring was included Bach actually was pretty well represented on this record. He also had the well tempered clavier on there there was the first Moon Beethoven's Fifth Symphony. You know the There was another tribes chant, and then of course, the most important I think musical work that was included out of all the pieces were on there as we as we all know from the documentary back to the future I. Save Marnie MC fly. It'll save the human race. We're talking about chuck. Berry's Johnny B good. There's actually a book all about the process that they used to select which sounds went on the golden record. It finally came out with a CD companion at some point. I'm sure it's on digital. Yes, the book itself is out of print, but you can sometimes find copies is called murmurs from Earth so if you want to learn more about how they came about choosing, which sounds, go in there That's that's a really well done piece it's..

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