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WVURAIL / dspira-lessons

Digital Signal Processing in Radio Astronomy - Lessons Portal
http://wvurail.org/dspira-lessons/
MIT License
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dspira-lessons/forum/astronomy/ #5

Open utterances-bot opened 3 years ago

utterances-bot commented 3 years ago

Astronomy Forum – Digital Signal Processing in Radio Astronomy - Lessons Portal

Lots of lessons

https://wvurail.org//dspira-lessons/forum/astronomy/

kbandura commented 3 years ago

Post Astronomy questions here!

PranavSanghavi commented 3 years ago

Post Astronomy questions here!

astronomy is awesome

Caviar-Cowboys commented 3 years ago

What kind of DSP filters do they use on the FAST telescope in China? There is a video here of them detecting a pulsar in real-time. What sort of DSP filters are they using?

https://www.youtube.com/watch?v=ouDh5xUS_cE&t=10s

Caviar-Cowboys commented 3 years ago

Actually I'm not sure if it's in real-time or not. There is another good video that show them detecting pulsars here.

https://www.youtube.com/watch?v=9eDl0D38r4M

Caviar-Cowboys commented 3 years ago

There is another good video here.

https://www.youtube.com/watch?v=zfYKEpQXSyo

1chinablue1 commented 3 years ago

The diy radio telescope instructions are awesome and nicely detailed! I want to build one and listen to to the Milky Way. Can someone direct me to the instructions for computer portion of the setup to hear the Milky Way? Ty.

glangsto commented 3 years ago

Hi China Blue,

Thanks for your email. All the code is on GitHub.com

The first step is installing gnu radio on your computer. There are many online documents. You’ll have to see what works for your computer and operating system.

The Wiki describes the method for putting the code on any computer:

https://github.com/WVURAIL/gr-radio_astro/wiki/Installing-gr-radio_astro

This is for different versions of the code compatible with gnu radio 3.7 and 3.8

If you have a raspberry pi 4 computer you can download a complete version of the operating system with everything installed.

See the installation guide and latest version of the operating system in this online directory:

https://drive.google.com/drive/folders/1t2soWvGIgze7wg-7QGlVgB0m3Q-BR3C-?usp=sharing

Good Luck.

Glen

On Feb 15, 2021, at 7:56 AM, China Blue notifications@github.com wrote:

The diy radio telescope instructions are awesome and nicely detailed! I want to build one and listen to to the Milky Way. Can someone direct me to the instructions for computer portion of the setup to hear the Milky Way? Ty.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or unsubscribe.

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1chinablue1 commented 3 years ago

Thanks Glen,

I reviewed all of the material on your site. It is very helpful. Yes, I already have the directions for installing GnuRadio.

But what I cannot find is any documentation that describes how to setup the software to listen in to the Milky Way. I don't see it online or at the GitHub link you sent.

Does it exist?

Ty

Sincerely,

China Blue http://www.chinablueart.com

On Mon, Feb 15, 2021, 9:05 AM Glen Langston notifications@github.com wrote:

Hi China Blue,

Thanks for your email. All the code is on GitHub.com

The first step is installing gnu radio on your computer. There are many online documents. You’ll have to see what works for your computer and operating system.

The Wiki describes the method for putting the code on any computer:

https://github.com/WVURAIL/gr-radio_astro/wiki/Installing-gr-radio_astro

This is for different versions of the code compatible with gnu radio 3.7 and 3.8

If you have a raspberry pi 4 computer you can download a complete version of the operating system with everything installed.

See the installation guide and latest version of the operating system in this online directory:

https://drive.google.com/drive/folders/1t2soWvGIgze7wg-7QGlVgB0m3Q-BR3C-?usp=sharing

Good Luck.

Glen

On Feb 15, 2021, at 7:56 AM, China Blue notifications@github.com wrote:

The diy radio telescope instructions are awesome and nicely detailed! I want to build one and listen to to the Milky Way. Can someone direct me to the instructions for computer portion of the setup to hear the Milky Way? Ty.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[ { "@context": "http://schema.org", "@type": "EmailMessage", "potentialAction": { "@type": "ViewAction", "target": " https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-779206293", "url": " https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-779206293", "name": "View Issue" }, "description": "View this Issue on GitHub", "publisher": { "@type": "Organization", "name": "GitHub", "url": " https://github.com" } } ]

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kbandura commented 3 years ago

Depending on the exact path you’ve followed, there are instructions here:

https://wvurail.org/dspira-lessons/categories/horn-operation/ https://wvurail.org/dspira-lessons/categories/horn-operation/

On Feb 15, 2021, at 9:16 AM, China Blue notifications@github.com wrote:

Thanks Glen,

I reviewed all of the material on your site. It is very helpful. Yes, I already have the directions for installing GnuRadio.

But what I cannot find is any documentation that describes how to setup the software to listen in to the Milky Way. I don't see it online or at the GitHub link you sent.

Does it exist?

Ty

Sincerely,

China Blue http://www.chinablueart.com

On Mon, Feb 15, 2021, 9:05 AM Glen Langston notifications@github.com wrote:

Hi China Blue,

Thanks for your email. All the code is on GitHub.com

The first step is installing gnu radio on your computer. There are many online documents. You’ll have to see what works for your computer and operating system.

The Wiki describes the method for putting the code on any computer:

https://github.com/WVURAIL/gr-radio_astro/wiki/Installing-gr-radio_astro

This is for different versions of the code compatible with gnu radio 3.7 and 3.8

If you have a raspberry pi 4 computer you can download a complete version of the operating system with everything installed.

See the installation guide and latest version of the operating system in this online directory:

https://drive.google.com/drive/folders/1t2soWvGIgze7wg-7QGlVgB0m3Q-BR3C-?usp=sharing

Good Luck.

Glen

On Feb 15, 2021, at 7:56 AM, China Blue notifications@github.com wrote:

The diy radio telescope instructions are awesome and nicely detailed! I want to build one and listen to to the Milky Way. Can someone direct me to the instructions for computer portion of the setup to hear the Milky Way? Ty.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[ { "@context": "http://schema.org", "@type": "EmailMessage", "potentialAction": { "@type": "ViewAction", "target": " https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-779206293", "url": " https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-779206293", "name": "View Issue" }, "description": "View this Issue on GitHub", "publisher": { "@type": "Organization", "name": "GitHub", "url": " https://github.com" } } ]

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1chinablue1 commented 3 years ago

Kevin,

I can see that I will find a setup example under: Determining a Velocity Curve of the Milky Way Galaxy. Is there documentation or someone that can advise me on how to set up the software to actually hear the result?

Ty.

On Mon, Feb 15, 2021 at 9:37 AM Kevin Bandura notifications@github.com wrote:

Depending on the exact path you’ve followed, there are instructions here:

https://wvurail.org/dspira-lessons/categories/horn-operation/ < https://wvurail.org/dspira-lessons/categories/horn-operation/>

On Feb 15, 2021, at 9:16 AM, China Blue notifications@github.com wrote:

Thanks Glen,

I reviewed all of the material on your site. It is very helpful. Yes, I already have the directions for installing GnuRadio.

But what I cannot find is any documentation that describes how to setup the software to listen in to the Milky Way. I don't see it online or at the GitHub link you sent.

Does it exist?

Ty

Sincerely,

China Blue http://www.chinablueart.com

On Mon, Feb 15, 2021, 9:05 AM Glen Langston notifications@github.com wrote:

Hi China Blue,

Thanks for your email. All the code is on GitHub.com

The first step is installing gnu radio on your computer. There are many online documents. You’ll have to see what works for your computer and operating system.

The Wiki describes the method for putting the code on any computer:

https://github.com/WVURAIL/gr-radio_astro/wiki/Installing-gr-radio_astro

This is for different versions of the code compatible with gnu radio 3.7 and 3.8

If you have a raspberry pi 4 computer you can download a complete version of the operating system with everything installed.

See the installation guide and latest version of the operating system in this online directory:

https://drive.google.com/drive/folders/1t2soWvGIgze7wg-7QGlVgB0m3Q-BR3C-?usp=sharing

Good Luck.

Glen

On Feb 15, 2021, at 7:56 AM, China Blue notifications@github.com wrote:

The diy radio telescope instructions are awesome and nicely detailed! I want to build one and listen to to the Milky Way. Can someone direct me to the instructions for computer portion of the setup to hear the Milky Way? Ty.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or unsubscribe.

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https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-779206293 ", "url": "

https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-779206293 ", "name": "View Issue" }, "description": "View this Issue on GitHub", "publisher": { "@type": "Organization", "name": "GitHub", "url": " https://github.com" } } ]

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GlenLangston commented 3 years ago

Hello Ty,

You’ve asked an interesting question concerning hearing the Milky Way. The frequencies are much too high for the human ear. However you could imagine some sort of sound being mapped to the structure of the arms of the Milky Way.

I’ve previously tried adding a tone matching the average doppler shift of the arms, but the results were not inspiring.

An artist would have to decide what kind of mapping they’d like to correspond to a spectrum with shape like our typical observations. Attached is a 24 hour observation with 1 hour averages of the observations.

Suggestions welcome.

Regards

Glen

On Feb 15, 2021, at 9:45 AM, China Blue notifications@github.com wrote:

Kevin,

I can see that I will find a setup example under: Determining a Velocity Curve of the Milky Way Galaxy. Is there documentation or someone that can advise me on how to set up the software to actually hear the result?

Ty.

On Mon, Feb 15, 2021 at 9:37 AM Kevin Bandura notifications@github.com wrote:

Depending on the exact path you’ve followed, there are instructions here:

https://wvurail.org/dspira-lessons/categories/horn-operation/ < https://wvurail.org/dspira-lessons/categories/horn-operation/>

On Feb 15, 2021, at 9:16 AM, China Blue notifications@github.com wrote:

Thanks Glen,

I reviewed all of the material on your site. It is very helpful. Yes, I already have the directions for installing GnuRadio.

But what I cannot find is any documentation that describes how to setup the software to listen in to the Milky Way. I don't see it online or at the GitHub link you sent.

Does it exist?

Ty

Sincerely,

China Blue http://www.chinablueart.com

On Mon, Feb 15, 2021, 9:05 AM Glen Langston notifications@github.com wrote:

Hi China Blue,

Thanks for your email. All the code is on GitHub.com

The first step is installing gnu radio on your computer. There are many online documents. You’ll have to see what works for your computer and operating system.

The Wiki describes the method for putting the code on any computer:

https://github.com/WVURAIL/gr-radio_astro/wiki/Installing-gr-radio_astro

This is for different versions of the code compatible with gnu radio 3.7 and 3.8

If you have a raspberry pi 4 computer you can download a complete version of the operating system with everything installed.

See the installation guide and latest version of the operating system in this online directory:

https://drive.google.com/drive/folders/1t2soWvGIgze7wg-7QGlVgB0m3Q-BR3C-?usp=sharing

Good Luck.

Glen

On Feb 15, 2021, at 7:56 AM, China Blue notifications@github.com wrote:

The diy radio telescope instructions are awesome and nicely detailed! I want to build one and listen to to the Milky Way. Can someone direct me to the instructions for computer portion of the setup to hear the Milky Way? Ty.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[ { "@context": "http://schema.org", "@type": "EmailMessage", "potentialAction": { "@type": "ViewAction", "target": "

https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-779206293 ", "url": "

https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-779206293 ", "name": "View Issue" }, "description": "View this Issue on GitHub", "publisher": { "@type": "Organization", "name": "GitHub", "url": " https://github.com" } } ]

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— You are receiving this because you commented. Reply to this email directly, view it on GitHub < https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-779250506>, or unsubscribe < https://github.com/notifications/unsubscribe-auth/AADL4WOQXZFJQAESU5FAG7DS7EUEBANCNFSM4T36M7EA .

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1chinablue1 commented 3 years ago

Glen,

Even though the frequencies are too high for human ears they can be sonified by shifting them to human frequency range to produce an acoustic result.

Would you mind sharing with me the method you used to produce tone matching. I would like to start with that to familiarize myself first with the software. From there I might be able to come up with something acoustically more interesting.

Oops your attachments didn't come through.

Sincerely,

China Blue http://www.chinablueart.com

Former Norman Prince Neurosciences Institute Artist in Residence Founding Director The Engine Institute Advisor to Congressman Langevin's "Art & Culture Committee" and the state of Rhode Island's "Arts & Health" Advisory group

On Mon, Feb 15, 2021, 12:48 PM Glen Langston notifications@github.com wrote:

Hello Ty,

You’ve asked an interesting question concerning hearing the Milky Way. The frequencies are much too high for the human ear. However you could imagine some sort of sound being mapped to the structure of the arms of the Milky Way.

I’ve previously tried adding a tone matching the average doppler shift of the arms, but the results were not inspiring.

An artist would have to decide what kind of mapping they’d like to correspond to a spectrum with shape like our typical observations. Attached is a 24 hour observation with 1 hour averages of the observations.

Suggestions welcome.

Regards

Glen

On Feb 15, 2021, at 9:45 AM, China Blue notifications@github.com wrote:

Kevin,

I can see that I will find a setup example under: Determining a Velocity Curve of the Milky Way Galaxy. Is there documentation or someone that can advise me on how to set up the software to actually hear the result?

Ty.

On Mon, Feb 15, 2021 at 9:37 AM Kevin Bandura notifications@github.com wrote:

Depending on the exact path you’ve followed, there are instructions here:

https://wvurail.org/dspira-lessons/categories/horn-operation/ < https://wvurail.org/dspira-lessons/categories/horn-operation/>

On Feb 15, 2021, at 9:16 AM, China Blue notifications@github.com wrote:

Thanks Glen,

I reviewed all of the material on your site. It is very helpful. Yes, I already have the directions for installing GnuRadio.

But what I cannot find is any documentation that describes how to setup the software to listen in to the Milky Way. I don't see it online or at the GitHub link you sent.

Does it exist?

Ty

Sincerely,

China Blue http://www.chinablueart.com

On Mon, Feb 15, 2021, 9:05 AM Glen Langston < notifications@github.com> wrote:

Hi China Blue,

Thanks for your email. All the code is on GitHub.com

The first step is installing gnu radio on your computer. There are many online documents. You’ll have to see what works for your computer and operating system.

The Wiki describes the method for putting the code on any computer:

https://github.com/WVURAIL/gr-radio_astro/wiki/Installing-gr-radio_astro

This is for different versions of the code compatible with gnu radio 3.7 and 3.8

If you have a raspberry pi 4 computer you can download a complete version of the operating system with everything installed.

See the installation guide and latest version of the operating system in this online directory:

https://drive.google.com/drive/folders/1t2soWvGIgze7wg-7QGlVgB0m3Q-BR3C-?usp=sharing

Good Luck.

Glen

On Feb 15, 2021, at 7:56 AM, China Blue < notifications@github.com> wrote:

The diy radio telescope instructions are awesome and nicely detailed! I want to build one and listen to to the Milky Way. Can someone direct me to the instructions for computer portion of the setup to hear the Milky Way? Ty.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or unsubscribe.

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GlenLangston commented 3 years ago

Hello

Here’s the attachment.

Glen

Glen,

Even though the frequencies are too high for human ears they can be sonified by shifting them to human frequency range to produce an acoustic result.

Would you mind sharing with me the method you used to produce tone matching. I would like to start with that to familiarize myself first with the software. From there I might be able to come up with something acoustically more interesting.

Oops your attachments didn't come through.

Sincerely,

China Blue http://www.chinablueart.com

ehalstea commented 1 year ago

Hello,

I'm preparing to have my students do the Velocity Curve activity for Quadrants II and III. The notes say to assign galactic coordinates to students and then have them use Stellarium to find the corresponding azimuth and elevation, but I can't seem to find a way to get Stellarium to do that conversion. Am I missing something? Is there another convenient way to do the conversion?

Thanks, Evan

JohnMakous commented 1 year ago

Hi Evan,

In Stellarium you can turn on the galactic equator in the viewing settings (and even the galactic grid, but I find the galactic equator alone works best because usually we want to scan along the galactic plane). The students can adjust the time of viewing in Stellarium, find the galactic longitude they want, and then click on the nearest object to that longitude. The azimuth and elevation will be listed on the upper left side of the screen (along with a lot of other info).

I hope this helps. Good luck!

John Makous

ehalstea commented 1 year ago

Thanks, John. I didn't realize there was a pop-up menu on the side of the screen. I am assuming this is not available in the web version, correct?

From: JohnMakous @.> Sent: Thursday, November 17, 2022 4:39 PM To: WVURAIL/dspira-lessons @.> Cc: Evan Halstead @.>; Comment @.> Subject: Re: [WVURAIL/dspira-lessons] dspira-lessons/forum/astronomy/ (#5)

Hi Evan,

In Stellarium you can turn on the galactic equator in the viewing settings (and even the galactic grid, but I find the galactic equator alone works best because usually we want to scan along the galactic plane). The students can adjust the time of viewing in Stellarium, find the galactic longitude they want, and then click on the nearest object to that longitude. The azimuth and elevation will be listed on the upper left side of the screen (along with a lot of other info).

I hope this helps. Good luck!

John Makous

— Reply to this email directly, view it on GitHubhttps://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-1319239118, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AG2PGHJFCE3SBDWHNLRRZNDWI2QYHANCNFSM4T36M7EA. You are receiving this because you commented.Message ID: @.***>

JohnMakous commented 1 year ago

I am not familiar with the web version. I just looked at it, and it seems pretty limited. I couldn't see how to view galactic coordinates. Also, it seems that it shows information for only a limited number of objects. You can view the azimuthal grid and the Milky Way visibly. So I suppose it could be used if needed. But since Stellarium is free and open source, I recommend downloading it and using it on a computer.

Let me know how it turns out.

John

On Fri, Nov 18, 2022 at 1:51 PM ehalstea @.***> wrote:

Thanks, John. I didn't realize there was a pop-up menu on the side of the screen. I am assuming this is not available in the web version, correct?

From: JohnMakous @.> Sent: Thursday, November 17, 2022 4:39 PM To: WVURAIL/dspira-lessons @.> Cc: Evan Halstead @.>; Comment @.> Subject: Re: [WVURAIL/dspira-lessons] dspira-lessons/forum/astronomy/ (#5)

Hi Evan,

In Stellarium you can turn on the galactic equator in the viewing settings (and even the galactic grid, but I find the galactic equator alone works best because usually we want to scan along the galactic plane). The students can adjust the time of viewing in Stellarium, find the galactic longitude they want, and then click on the nearest object to that longitude. The azimuth and elevation will be listed on the upper left side of the screen (along with a lot of other info).

I hope this helps. Good luck!

John Makous

— Reply to this email directly, view it on GitHub< https://github.com/WVURAIL/dspira-lessons/issues/5#issuecomment-1319239118>, or unsubscribe< https://github.com/notifications/unsubscribe-auth/AG2PGHJFCE3SBDWHNLRRZNDWI2QYHANCNFSM4T36M7EA

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vgro31245 commented 10 months ago

Hello Dspira Group,

What is the process for pointing the horn telescope? Do I choose the coordinate az=180° or az=0° and then have the alt = 30,45,60, or 75 etc? If so do I need the galactic coordinates for data analysis?

Thank You,

Vic

JohnMakous commented 10 months ago

Hi Vic,

I recommend using Stellarium. It is a free, open source planetarium for your computer. You can view the sky from your location at any point in time - present, past or future. It's a great tool for planning an observation. When you click on an object in the sky, it gives several different coordinates of that point, including az and elevation as well as galactic coordinates.

I hope this helps.

John

vgro31245 commented 10 months ago

Hi John, Thank You for that information and quick response. Continued success with the great work that you do. All the Best, Vic On Friday, September 8, 2023 at 07:13:58 PM CDT, JohnMakous @.***> wrote:

Hi Vic,

I recommend using Stellarium. It is a free, open source planetarium for your computer. You can view the sky from your location at any point in time - present, past or future. It's a great tool for planning an observation. When you click on an object in the sky, it gives several different coordinates of that point, including az and elevation as well as galactic coordinates.

I hope this helps.

John

— Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you commented.Message ID: @.***>