Deep Space Network: How we receive images from spacecraft
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- Опубликовано: 9 июн 2024
- There are lots of awesome pictures of the planets in our solar system. We have the these pictures because of the amazing spacecraft we've sent there. But one component that's overlooked the underlying communication network that gets the image from the spacecraft to our computer or mobile screen. Today we'll look at the Deep Space Network.
This is Celestial Sphere. A brand new series that looks at spacecraft, planets and their support system.
Music:
Moments in Space by spinmeister (c) copyright 2007 Licensed under a Creative Commons Attribution (3.0) license. dig.ccmixter.org/files/spinmei... Ft: DJ Rkod 
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www.reddit.com/r/SmallRUclipsrScience/
Give these guys some love.
This is some really quality content.
Thanks. Glad you enjoyed it.
I've worked in radio communication and I still learned a lot from this, thank you
Thank you for this. I was trying to find exactly this answer and your video was the only one of four that I watched that answered it. Please keep making content, I'm going to check out your other stuff now.
Appreciation timeee, I'm so glad I found your channel, quality, straight-forward and visually appealing content, really imformative.
This video is just amazing! Such a deep & easy way to explain. Thanks alot
amazing video
The DSN is the unsung hero of so much of our exploration of the solar system. I hope some day a huge array of antennae in orbit will form an array even better and more reliable.
Agreed. NASA is currently testing an optical deep space communication system that should have a much higher bandwidth than radio. I'll definitely do a video on that when I gather enough info on it.
High quality man. Thumbs up
Absolute quality. Just subscribed
Brilliant presentation with perfect content articulation, creative visualization and cognitive conception.
Many many thanks!
A1 content dude, A1!
Excellent explanation and editing. Keep it up 👍. Love from India
Thanks a ton!
Great video, very informative!
great info
found this video on the date of the JWST launch (12/25/21). great info as it appears not too much has changed
This video is the SHIT! So much meaty, actual content!!
Thanks for that awesome comment.
Thank, very informative
Thank you for the video. Just to be sure to correctly understand (because English is not my mother tongue), I try to summarize what you said. We use big dish to focus the weak signal at a subreflector which reflects it to a waveguide and then it reaches at the base of the structure an antenna and a complex receiver which amplifies and processes the signal, then records data on hard disks before sending it to scientists through the internet, am I right ?
You are correct.
The type of dish I have in the video is a Beam Wave Guide type. Other dishes don't have the beam wave guide but have the receiver at the center of the dish instead.
@@ReflectiveLayerFilm I didn't receive any notification of your answer, si I just saw it today. That's clear, thanks.
Great video, thank you!!
Your channel is awesome
Thank you.
this is the coolest thing I've ever seen
Awesome! Welcome to Reflective Layer.
Your channel is interesting! super cool!😍
Thanks for supporting the channel in its early days.
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Great video.Can you do one on how instructions are sent to something like voyager?
Great suggestion. I may do a part 2 of the Deep Space Network and add that in. The Voyager spacecraft are very interesting. I should do a video on them.
This. How does it work in reverse and how does either side "find" the signal in the vastness of space.
All the more amazing when you consider Voyager 1 is something like 20 billion kilometers away and its signal strength by the time it reaches Earth is less than an attowatt! (a billion billionth of a watt)
how do you know it s signal strength when received?
I still don’t really get it. As far as I’m concerned the explanation is, “radio waves, dipty-doo, rooty tooty too, they’re back on earth!!!” 🤯
Wave guides are made for a limited frequency range. Are all spacecrafts using the same frequency? And, when the speed increases of which earth and the spacecraft get separated, the wavelength changes due to the doppler effect. How does that influence the receiver setup?
All space spacecraft in deep space using the Deep Space Network(DSN) use a portion of the S, X, and Ka band of the electromagnetic spectrum. That's from 2Ghz to 40Ghz.
Each spacecraft must schedule com time with DSN. This is why the DSN is looking into Laser communication to increase the very limited bandwidth.
It's true that the base frequency shifts due to the Doppler effect created by relative motion. This is accounted for and it's within the freqeuncy range that DSN is listening to. In fact this Doppler effect is the reason why Radio Science can be performed by DSN using only the transmission from a spacecraft. Cassini heavy relied on Radio Science on it's mission to Saturn.
I have a video on Radio Science on the link below.
ruclips.net/video/ruz8TToIA2Y/видео.html.
Here's an interesting read where Doppler shift almost caused the signal from the Huygens probe to be unreadable by Cassini.
www.thespacereview.com/article/306/1
what is the name of background soundtrack? Nice video
Moments in Space by spinmeister
dig.ccmixter.org/files/spinmeister/12093
Hello, can you hear me? :p
How is it the other way? If u need so much technic to receive from space, how do spacecraft receive there signal?
Spacecraft also have their own big radio dish(high gain antenna) which can amplify weak signals. They are obviously not as big as the ones on the ground but they are still big. The key however is the power of the ground base station. Deep Space Network can uplink to a spacecraft at up to 256kbs using its 20kw transmitter
Impressive, if you could answer one question please, we know that this type of communication is very limited in term of bandwidth, so how they can receive a 4k video from spacecraft, and how much time in general do they take to be transmitted?
The biggest question is how they've been able to do live streaming, with clear voice and video from the Apollo missions to the moon 50 years ago?
Video data is never streamed from these unmanned spacecraft since video in most cases is a waste of bandwidth. The Mars Reconnaissance Orbiter for example can send data to earth at up to 4Mbps when earth is closest to mars. checkout this NASA site for download info of various spacecraft
eyes.nasa.gov/dsn/dsn.html
As for Apollo the video and audio were far from clear and they didn't live stream as it's done today. Also the resolution was much smaller 10 frames per second (fps) with 320 lines per frame. The transmission was live but it wasn't a digital format.
@@ReflectiveLayerFilm Thanks for the explanation, so those live streams that we see on RUclips are not live from the spacecraft, they are live from the streamer, NASA for an example, right?
Can you please elaborate more on the Apollo thing, i mean what streaming method they used that differs from what is used today? and what was the format if it's not digital?
Yes they are live from NASA and not the spacecraft. Some pictures are live insofar as we see it immediately after the travel distance delay of the signal. The pictures are low resolution because of the limited bandwidth. Later on after the event of the live stream is over, NASA will then download the high res stuff like videos and bigger images. These may take a few days. You have to keep in mind that each spacecraft is allotted only a certain amount of time a day to communicated with earth. That's because the communication channel to earth needs to be shared among many spacecraft.
As for Apollo TV transmission method, checkout the document below. It goes into detail how that system works.
www.hq.nasa.gov/alsj/ApolloTV-Acrobat5.pdf
@@ReflectiveLayerFilm Thanks again for your time and answers.
Have a nice day.
How? Very very very slowly. Voyager 2 transmits at 160 bites per second. Not bytes but bits. To put that into perspective your 56k dial up modem is thousands and thousands of times faster.
for the algorithm
Kilo meters? Not kilometers???
Yes prefix is separate like the way centimetres and millimetres are pronounced.
Chandana Nimal Sepala Psychic Language
I don't believe a word in this video
It sounds like you are RETARDED!!!🤪
command man really lolll 1.2 billions km and why they don t do that to provide internet worldwide . and we re not talking about billions km ... lmao make no sense
Now with chicken