Successful detection of galactic hydrogen and calculating velocity from Doppler shift using phased array

[athornett]

I have summarised my progress so fsr on my website on URL below.

 

https://astronomy.me.uk/successful-detection-of-atomic-hydrogen-in-milky-way-using-phased-array-and-sdr

 

Please can you take a look - I am really keen to receive constructive comments and criticism to help me improve the observations and also suggestions for what I do next..I would like to try to map the Milky Way but not sure best way to go about this?

 

Andy

 

[andrew s]

Always good to seeing someone take the path less travelled.  Regards Andrew 

[SteveBz]

There are several resources:

https://pictortelescope.com/

With a writeup here:

https://www.rtl-sdr.com/pictor-an-open-source-low-cost-radio-telescope-based-on-rtl-sdr

Managed by one of our members.

rtl-sdr.com has lots of other references too. Eg jobs telescope (Google it).

@Victor Boesen also has written some sdr code on github, which works quite nicely and I used his with a 1.3 m dish and sdr.

From where we are you can map at least 1/4 of the Milky Way. If you have a clear horizon maybe more. Prepare to be stunned at what you can do 😀

Good luck,

Steve.

 

[athornett]

Thanks all!

An update on my progress together with an early plot or two can be seen on my website at:

http://astronomy.me.uk/plotting-hydrogen-of-milky-way

Andy

[SteveBz]

Nice. The top left image has three peaks. A tall one and two short ones. Like this:

Each peak is a separate arm of the Milky Way, so three arms. You can calculate the distance to each one.

Here the writer has performed a gaussian fit on each peak to find the central point.

As the Earth spins you can collect a plot, say, every 10 minutes and plot the curve for each spiral arm.

Here's how to do it.

https://physicsopenlab.org/2020/09/08/measurement-of-the-milky-way-rotation/

Good luck.

[athornett]

On 01/10/2023 at 19:58, SteveBz said:

Nice. The top left image has three peaks. A tall one and two short ones. Like this:

Each peak is a separate arm of the Milky Way, so three arms. You can calculate the distance to each one.

Here the writer has performed a gaussian fit on each peak to find the central point.

As the Earth spins you can collect a plot, say, every 10 minutes and plot the curve for each spiral arm.

Here's how to do it.

https://physicsopenlab.org/2020/09/08/measurement-of-the-milky-way-rotation/

Good luck.

That's just what I was looking for - thanks!

Andy

[athornett]

An update to my observations with some very nice 4 day drift scajd of Cygnus region from Lichfield UK using my ohasdd array, HNA and SDR.

Also an dxample of amazing outputs that come from Ted Cline's incredible (and free) ezRA suite of python software - designed for newbies like me!

http://astronomy.me.uk/four-day-drift-scan-of-milky-way-at-1420mhz-hydrogen-using-sdrtriffid-array-from-lichfield-uk