Using Software Defined Radio As A Radio Telescope
ฝัง
- เผยแพร่เมื่อ 5 ต.ค. 2023
- In this video we attempt to receive the Hydrogen Line on 1.42 GHz using a Nooelec Mesh antenna and a software defined radio.
SAWbird+ H1
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Nooelec Mesh Antenna:
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#TechMinds #SDR #HamRadio - วิทยาศาสตร์และเทคโนโลยี
Very nice! The Doppler effect was more caused by the Milky Way Galaxy rotation depending on where the antenna was pointed on the Milky Way arm. Really cool you got that the first time.
Interesting. Earth is moving at 220km/s around the center of the galaxy, and as it rotates, it faces different 21cm sources at different relative velocities. I can't do the math tho, it's a mess of interfering rotations and sources lol.
@@Ratzfourtyfour Well it might be a late reply but finally got the first data last week with 2.3 m antenna. And yeah, you can actually calculate the Doppler frequency and add the solar system rotation and earth rotation in the formula and we managed to calculate maybe within -/+ 5 km/s of theoretical calculation (RTL-SDR TCXO actually limits the accuracy to about 1.5 km/s but you can get GPS-DO receiver with 1000 times better accuracy). There's even an application called SDRAngel with Radio Astronomy plugin that can crunch more number beyond that but I ain't even touch that for a while as it's very complicated, lol. It's mind-blowing what today's technology especially the RTL SDR can offer!
SCIENCE!!! Your best video yet!! I hope you continue with this type of content.
I used to work at the Very Large Array, as an intern, building antennas, running cables, chasing down RFI, getting yelled at by astrophysicists... It was so much fun, and I miss it a lot.
I scream at interns. Also fun.
Thank you. That was awesome, with such a cheap setup. I'm sure you will have inspired a lot of other people to follow your footsteps. We stand on the shoulders of giants :)
Fascinating material covered here! I have an old C band dish that needs a project like this. Hmmm...
Go for it!
The fact that average people can do this at home is amazing. I totally got your point.
Thanks for the tip on the 1420 filter!
Very cool. Looking forward to more like this.
Just found this channel. Very Cool!
Sorry I'm late to the party.... you just raised my interest!!! I've been trying to figure out something like what you did. But I was gonna use rotors for tracking... ie ham satellites etc. But this is on my bucket list!!!
Thanks Matt, I've been interested in Radio Astronomy for a long time. Still have 2 Sat dishes to try out...
Been eyeing that antenna for a while. Might just have to pick one up!
I have a license and training in astronomy. it's one reason why I got into ham radio. This is something rhat will contribute to one of my projects.
I do Astrophotography and am used to looking for Hydrogen Alpha (HA) Nebulae to photograph. I wonder how much of the sky that antenna is actually sampling. I'm curious if you were to mount it to let's say a computer controlled Equatorial Telescope Mount and use it #1 keep a target centered, but #2 scan the sky for other pockets of HA, you might be able to make discoveries that haven't been seen yet. Would be cool to write some software to visually map out the sky along with the perceived HA level.
th-cam.com/video/ChwmGmICQuU/w-d-xo.html&si=qShjvyWZ3MYsyZJJ
nice chemtrails at 2.20
@@OPIXdotWORLD No, it's just perfectly safe condensed water vapor in a cold, moist section of the atmosphere created by absolutely completely perfectly safe, hot jet exhaust gas and particulate material from burning exponentially larger amounts of the same type of fossil fuel us pathetic wastes on the ground use. But remember, only those emissions are perfectly safe though. Not ours. And definitely not us eating burgers or a bear sh'tting in the woods.
@@OPIXdotWORLD???
@@meloney what dont u understand...?? from 2,27 to 2.40...
Thanks for this video!
Viewing the thumbnail I thought you managed to get your hands on a government surplus dish antenna....oh well yours still works!
Have a nice day!
haha... Well, maybe in the future I may acquire something very special :-)
GG!!! Awesome experiment and result!!!!
Even though I didn't have a clue as to what you were talking about in most of this video, I still found it interesting and entertaining. Thanks!
Glad you enjoyed it!
Thanks for the great video’s. I wondered if you have used or might do a review on the Diamond BB7V? It looks like an interesting antenna!
loved the video
Parabéns, você é um gênio!
This sounds fantastic and very Seti League. I've been itching to do something similar and I hope I can get something like this set up.
You can do it!
I’d highly recommend doing a Jovian Radio project, it takes some work but I think it’s absolutely awesome
Concur!
Nice video Mate. I'm looking into drift scanning on the L band for the Hydrogen Line. Got all the bits, need to get started.
nice one mate! Let us know how you get on!
Great video. Subbed...👍
Awesome, thank you!
Very good.
Thanks ❤
You can use the same technique used for meteor scatter in ham radio and do a form of meteor detection. Let me know if you would like more info .. and keep up the great work on your videos!
Is what you are describing some sort of a passive radar? If yes, it can be used to detect potentially UAPs?
@@paulatreides6779
No and no.
@paulatreides6779 here is a basic description
When a meteor enters the Earth’s upper atmosphere it excites the air molecules, producing a streak of light and leaving a trail of ionization behind it kilometers long. This ionized trail may persist for less than 1 second up to several minutes, occasionally. This trail is capable of reflecting radio waves from transmitters located on the ground, similar to light reflecting from a mirrored surface. Meteor radio wave reflections are also called meteor scatter, or pings.
In order to listen to meteor Scatter, you need a powerful transmitter in VHF band located not too close but not too far from you, we are using the video sync signal from a TV station in Canada, an Off Center Fed Dipole antenna, and a USB Software Defined Radio receiver.
In the UK, it's usually achieved by detecting the fluctuations in the Graves radar array.
@danbrandon8545 I'm interested in such a thing, even have an antenna set up but lack the knowledge
Fantastic drift-scan neutral hydrogen emission line radio telescope! Can you detect emission lines from other molecules such as carbon monoxide (CO) or Hydroxyl (OH) or even maser lines (microwave lasers)?
Awesome!
Thank you! Cheers!
I'd love to know how they create those images of a radio telescope. Thanks brilliant vidro as always
I'd imagine there's some sort of software out there. I saw a video years ago of a wifi telescope/camera. They put it outside and saw right through into their apartment I think it was and the different strength signals made a detailed image of the objects within due to reflection and attenuation. It might have been taken down, but still search for it.
For that extremely high-resolution image of i.e., the Black Hole from the Event Horizon Telescope, they used so called Interferometry which need multiple radio telescope array from across the world (literally a telescope a size of the Earth). You can see ALMA in Chille or more famously the VLA that made a cameo from the movie Contact :).
Interesting, I have what looks to be an identical antenna but it was sold for long distance WiFi links, so ~2.4GHz.
I wonder if you could use a radio telescope to listen to the lightning storms on Jupiter? I think some of the spaceborne instruments have detected it, but I didn't find anything right away saying if you could detect it on earth.
Do a search for radio jove
Suppose I wanted to connect 2, 3 or 4 of these small MESH antennas together, space them apart a certain distance to create one large receiving area.
Would you know what kind of hardware/software I would need?
wow ! interesting ..
Hello
What equipment do i need.
Beginner Introduction please..
I think you can listen to the lightning on Jupiter in 17/18 MHz with a dongle..it's been along time but I think I remember it on TV...
Yup. I am currently doing this, but at around 21 MHz. Usually, when you get signals from Jupiter it's very broadband, all the way from maybe 15 MHz to 25 and above. (_I_ chose 21 MHz for my "telescope", because I don't have a lot of interference there). My biggest problem so far has been the sheer size of the antennae, since I don't have a house with a garden...
You can hear Saturn and Jupiter on hf radio around 21mhz
@@standupmackan are u guys joking? ? listning to jupiter? what?
@@dennis8019 yup! Jupiter’s moon Io have so powerful thunderstorms that you can pick up the signals from the lightnings, here on Earth, but they usually need quite directional antennae in order for the signals not to drown in earthly background noise. And sometimes fairly specialized filters, too.
Good job (Too bad you could not review the GOES satellites because of your Location) Wish I had this Dish to Try the GOES Signal.. anyway.. (GOOD JOB !!)
🥇🥇🥇🥇🏆🏆🏆🏆 ACHIVEMENT ... WOW that's a lot of tape on the H1 LNA 😊
Yeh, I know! I may try an experiment on this soon.
Can't wait to see what you will do.. (Cuzzz Always Cool) or as you say Brilliant.. 73's@@TechMindsOfficial
Great video. I've wanted to do this, except my intent is to have the dish on a stepper motor gimbal with az/el capability. What I need is a coding person to write an app that will move the dish horizontally and vertically to scan a grid across the sky. By mapping the hydrogen signal strength in each cell of the grid we can convert the data to an actual visual presentation of the Milky Way. If you know anyone that can write such an app let me know! Thanks for the presentation. Love your channel. 73
Weird. Why do you need a person for this? If you have the motors/controllers set up to be controlled from a serial port, I'm sure ChatGPT can help you whip up something in Python.
Hardly weird. But you make a good point. I hadn't thought of ChatGPT for writing an app. Interesting.
This is wonderful! What else could be detected with it- the Sun? Jupiter?
I'll be researching this for sure!
Both are known radio objects.
There is a similar project you can do called RadioJove:
radiojove.gsfc.nasa.gov/
Try VLF natural radio "auroral chorus, dawn chorus". :)
Is there the equivalent of an LNB to convert Ghz signals into a lower frequency and so reduce feeder losses. I appreciate that broadcast satellite frequencies are around 10 Ghz and maybe the gain of down converting is not worth the extra £ and complexity. Interesting video, thanks for uploading.
Yes, there is a product called "Ham it down" from NooElec. I have one here and will be doing a video on it soon. Thanks
The thing about these small SDR dongles is that they can be mounted very close to the receiving antenna, minimising losses. I have some ADS-B receiving antennas where I basically built the SDR receiver into the bottom of the antenna, then ran a USB cable from there.
Are there any citizen science schemes that collate radio data?
I installed sdr# v. 1727 on my win7 machine and it runs. but there is no "PlugIns" option under the Hamburger. Any help?
But why the 21 cm peak dissapeared at a specific time???
And where would one download IF Average plugin?
bro, where do you live? looks beautiful
Buckinghamshire in the UK :)
Whih software is used to ru run it
cool nice 73
What do you mean "do to the doppler effect"? Why would the doppler effect show an rf spike? Doppler effect is an increase or decrease in frequency & at the speed of the earth's rotation a doppler effect would not show up since rf travels at nearly the speed of light & the earth's rotation is a fraction of that. 6.67 miles per second as oppose to 186,000 miles per second.
Have your tried using Satdump with this setup
Not yet, but I have that planned! Shhhhssss dont tell anyone.. :-)
@@TechMindsOfficial mum's the word
one of the things I am working on. yuo showed how to get results. First thing I want to try is modulating a laserbeam with sound. Thats radio amateurism without a license nidce video PE3FS
That would be so cool, I have often thought about that too! There must be a way of doing this. Shame you are not in the UK so we could work on the project together. Let me know if you get any results!
I used to experiment with stuff like this...originally with a helium neon laser, attaching a mirror to a speaker to reflect it. Results were, er, mixed! This was a long time ago now, probably back when CDs first became popular. I'd guess it would be feasible to electrically modulate a laser diode like in fibre optics. I'm guessing you want to modulate it with analogue audio rather than digital?
5:44 Why would it be local interference and not satellites coming into and going out of view?
You're right, it could be other satellites. For the purpose of the video any signal that is not what I was looking for could be classed as interference. Given the band we are looking at, and the direction the antenna is pointing, it is most likely local interference though.
I was hoping to see the insides of the SawBird. A rather incomplete review without even a quick look under the cover.
How about you buy one and then take a look inside. Pleb!
@@TechMindsOfficial 😱 What an attitude
@@AdrianBoyko Well, for starters the video wasn’t a review video! So calling it an “incomplete review” was a bit knobbish Thing to say. Secondly, if you’d of asked me politely to show the insides of the sawbird I would of obliged. So, that’s the attitude.
@@TechMindsOfficial You aren’t enjoying my sense of humor today! 😂 This was a direct quote of the guy who complained about you not having opened up the digirig. Don’t worry, we love your content!
@@AdrianBoyko Oh shit! I'm so sorry..! You must realise how many troll comments I get. Sorry dude, I should of realised you was taking the P*ss..! Sorry dude..
use a telescope mount. then you can run it form inside .
like 2.4 wifi antenna.
#UAP ? 😊
Im fascinated with radio astronomy. Im currently doings my masters in astrophysics. As part of my course im planning to make software that will map the milky way, there is already software to do this, but i feel like i would understand a whole lot more if i did it myself.
So if you were to make a series of videos on the subject, that would definitely do it for me.
Ive looked many times for a decent channal on radio astronomy, because that doesn't exist. 🤔😉
Nikola Tesla detected astronomical radio in the late 1800's
Have you tried using it to look through walls?
looks like that dish has a rather narrow field of view
youtube blocks everything cuz Im low income and cant afford to pay them for no ads. There show ads menu does not work. Cant show my children any of this now. Discriminate much?
What does this comment even mean? Proof reading is a thing.
what?
You just found another subscriber, 10/23/2023!
KD8EFQ/73
Absolutely awesome , men🥹👍