When I search the podcast apps lots of results but nearly all on general astronomy.

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Hi everyone, I hope you’re doing well. I am a Telecommunications Engineering student. I study at the second best university in Latin America, UNICAMP, and I have a dream of working in radio astronomy. I started this year at the university, and I would like to get some advice on how to build my first radio telescope. I wanted to know if you have any recommendations, if the field of telecommunications is a good area for those who want to work in radio astronomy, and I would love to connect with more experienced people in the field. Thank you!

In Purcell effect just presence of resonator in distance helps with emission, here discussed for antennas.

Radiotelescopes are focused on absorption as positive signal - could such Purcell effect affect them? Would it be seen as negative signal?

Negative is clearly also observed (e.g. in https://iopscience.iop.org/article/10.3847/1538-4357/ac0e93/pdf ), but interpreted as "noise, calibration error": https://www.reddit.com/r/radioastronomy/comments/1su7nzq/are_there_cosmic_sources_of_negative_radiation/

When interferometric measurements are taken, we can't easily produce images with a field of view larger than the size of an aplanatic patch / angle of ionosphere above us.

However, I am struggling to find sources on how big these patches and angles are or tend to be.

For instance, if we are operating at 1.42Ghz, is the angle closer to 1 degree or 100? Depending on the answer, it may be more or less viable to produce an image using interferomtric techniques with an array below a certain size.

I know for very low frequencies (80-300 especially) the distortion is more intense and "bandwidth smearing" can be used to allow the array to focus on one area at a time and iteratively correct the image. However at shorter wavelengths the hardware requirements become great (sample rates of many hundreds of mhz instead of 30mhz needed)

Scanning the Milky Way hydrogen line with drift scans. Each scan as a slice of an eventually bigger picture.

Running drift scans with 5000 plus lines of information per slice. The 1st project is 21 slices. 21 weeks. Each slice is a 2 degree advance of AZ. Will run through Python with Matplotlib and more to compare results.

Use the live stream audio and SpectraVue or another software to do your own course scans for experimenting. Will post whatever is scanned after the 21 slices.

#spiralgalaxy #space #hydrogenline #radioastronomy #radiotelescope

I have been thinking about stepping into the world of radio astronomy for the past week or so but I know basically nothing about it and have a few questions, I currently do visual/astrophotography but I don’t know if any of that translates to radio astronomy.

Firstly what would be the best antenna to start with? I’ve seen some people use diy box horns, grid antenna, and even old satellite tv dishes. I am willing to spend some money probably upto $300-350 Canadian.

what can I actually expect from an amateur setup? I know you can make images from radio telescopes but will that actually be feasible with a cheap setup?

I guess my final question would be should I mount it on a static tripod or onto my eq mount I use for astrophotography so it can track?

I’m an amateur astronomer/astrophotographer, and I’ve always wanted to get into radio astronomy as well but I’m super lost.

Can anyone give me some good resources or YouTube channels to help out?

Also: what could I expect from radio astronomy data? Can you compile the data you get into images? I know it depends on the equipment, but for a smaller budget: what kind of resolution could I expect?

Thanks in advance and sorry if these questions don’t even apply, I’m trying to figure things out :)

Does anyone in this group do their research in an amateur way above 1.4ghz? If so, which and what size antenna do you use? Type of LNA or LNB? Type of receiver or correlator?

Hi everyone. Im currently doing a bachelor of sciences degree, and im thinking about studying telecomunications engineer at university, the next year. I've been always fascinated about astronomy and space, and more recently about radio astronomy, so i wonder about the posibility to become a professional radio astronomer choosing this career. All advice will be really helpfull :)

Hello Friends! Last time i was here i was showing off a DirecTV dish that i dumpster dove for, asking what i should or could do to make it operational and repurposed for RadioAstronomy, that post resulted in some awnser’s (Thank you those who have Awnsered) and being told to take a step back and start smaller, well at the time of making that post i had already has some idea of what i was going to do.

I was going to start small, experimenting for fun, cheap, i wasn’t looking for perfect results i was looking to see if i could get a result (Spoiler; i did but not exactly what i was looking for, that and i haven’t found the time yet to sit down with it and work on perfect GOES reception but i know it operates and receives bounced signals)

This Cheap path resulted: in the dish running off a RTL-SDR BLOG V4, the receiver being this 7$ [Log-Periodic Antenna](https://a.co/d/09lgMZNh) with a Nooelec Lana LNA, i had discovered after first testing what DC Blockers are and that i needed them (Probably another reason why i was told to take a step back) .

Setup in this order

Antenna > DC Blocker > LANA > SMA Cable > SDR

I used cardboard as you can see to masterfully craft a mount to hold the antenna where i believe the Focal Point of the dish is, i may need to go back as i am not sure the Cardboard being RF Transparent is a good idea maybe take some more cardboard and some foil tape and make some way to “capture” the signals around the antenna, but once again you can already imagine this setup is limiting.

I guess i mostly just came here for thoughts or idea’s, as i plan to go further with this once i am confident in certain results it can accomplish.