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Society of Amateur Radio Astronomers
United States
เข้าร่วมเมื่อ 5 มิ.ย. 2015
The Society of Amateur Radio Astronomers (SARA) is an international non-profit organization. The society provides a collaborative environment for radio astronomers at all levels.
The members have developed radio telescopes and have detected galactic hydrogen, masers, pulsars and even fast radio bursts.
The society holds two online meetings a month. One discusses everything technical about building and maintaining radio telescopes. The second shows practical observations and techniques to observe with various radio telescopes.
The society holds two world-wide conferences per year where members brief the latest in radio astronomy design and builds.
The society, also publishes the journal Radio Astronomy, with an issue every 2 months.
If you are interested in radio astronomy visit the SARA website at radio-astronomy.org
The members have developed radio telescopes and have detected galactic hydrogen, masers, pulsars and even fast radio bursts.
The society holds two online meetings a month. One discusses everything technical about building and maintaining radio telescopes. The second shows practical observations and techniques to observe with various radio telescopes.
The society holds two world-wide conferences per year where members brief the latest in radio astronomy design and builds.
The society, also publishes the journal Radio Astronomy, with an issue every 2 months.
If you are interested in radio astronomy visit the SARA website at radio-astronomy.org
Drake's Lounge July 2024
SARA www.radio-astronomy.org
CHAT:
Ted Cline - N0RQV: 2024 SARA Eastern Conference, 4-7 August 2024 …. www.radio-astronomy.org/SARA-Annual-Conference
Monroe Pattillo: www.qsl.net/4nec2/
Wolfgang Herrmann: For those of you using Linux: NEC2 can be installed from the repository in most distributions
Mike Caba: Newbie question. I am starting to learn the process of meteor detection using a DTV broadcast. I would like to use software that saves the screen and audio while in the system is in operation. Any suggestions regarding software?
Monroe Pattillo: OccultWatcher « IOTA (occultations.org)
Monroe Pattillo: Electrically-driven Yagi-Uda antennas for light | Nature Communications
Ted Cline - N0RQV: Deep Space Exploration Society ... dses.science/
CHAT:
Ted Cline - N0RQV: 2024 SARA Eastern Conference, 4-7 August 2024 …. www.radio-astronomy.org/SARA-Annual-Conference
Monroe Pattillo: www.qsl.net/4nec2/
Wolfgang Herrmann: For those of you using Linux: NEC2 can be installed from the repository in most distributions
Mike Caba: Newbie question. I am starting to learn the process of meteor detection using a DTV broadcast. I would like to use software that saves the screen and audio while in the system is in operation. Any suggestions regarding software?
Monroe Pattillo: OccultWatcher « IOTA (occultations.org)
Monroe Pattillo: Electrically-driven Yagi-Uda antennas for light | Nature Communications
Ted Cline - N0RQV: Deep Space Exploration Society ... dses.science/
มุมมอง: 78
วีดีโอ
RTOP July 2024: Masers, galaxies, grants, IBT, new DSES 30ft dish, and magnetometer observations
มุมมอง 26814 วันที่ผ่านมา
SARA www.radio-astronomy.org SARA Gift Shop: saragifts.org Ted Cline - N0RQV: Skip's Replication of filtered interferometer measurements in interstellar communications ….. arxiv.org/abs/2407.00447 Ted Cline - N0RQV: For folks starting to explore radio astronomy, ezRA - Easy Radio Astronomy Free 1420 MHz Galactic hydrogen data collection and analysis Open source Windows and Linux github.com/tedc...
Drake's Australia June 2024: Antenna Build, Sun dial - winter solstice, VELA Pulsar glitch
มุมมอง 222หลายเดือนก่อน
SARA Website: www.radio-astronomy.org SARA Gift Shop: saragifts.org Chat: Len Sciacca (Uni Melb): nanorfe.com/vna6000.html Duncan Campbell-Wilson VK5DCW: VNA pocketVNA used successfully Len Sciacca (Uni Melb): I ordered through tindie.com. It arrived in 4 days. Len Sciacca (Uni Melb): Mine was $800
Drake's Lounge June 2024: Interferometers, masers, galaxies, disk yagis, and tracking systems
มุมมอง 335หลายเดือนก่อน
SARA: www.radio-astronomy.org SARA Store: saragifts.org Chat: Ted Cline - N0RQV: For folks starting to explore radio astronomy, ezRA - Easy Radio Astronomy Free 1420 MHz Galactic hydrogen data collection and analysis Open source Windows and Linux github.com/tedcline/ezRA Bob N5BRG: From Wikipedia: A magnetar is a type of neutron star with an extremely powerful magnetic field (~109 to 1011 T, ~1...
RTOP June 2024: Gift Store, Eastern Conference, Galaxy Observations, First Light Hydrogen Telescope
มุมมอง 230หลายเดือนก่อน
SARA www.radio-astronomy.org SARA Store: saragifts.org Chat: Ted Cline - N0RQV: saragifts.org/ Ted Cline - N0RQV: www.basicmicro.com/Roboclaw-2x7A-Motor-Controller_p_55.html Bob N5BRG: www.basicmicro.com/RoboClaw-2x30A-Motor-Controller_p_9.html Ted Cline - N0RQV: www.basicmicro.com/motor-controller Ted Cline - N0RQV: 2024 SARA Eastern Conference and Global Radio Astronomy Symposium ... Green Ba...
Drakes Australia May 2024: Vela Pulsar glitch and solar flares
มุมมอง 1722 หลายเดือนก่อน
SARA Gift Shop: saragifts.org SARA: www.radio-astronomy.org Rich Russel - SARA President: Steve Olney's Pulsar monitor - HawkRAO (google.com) Andrew Klekociuk: My pulsar thesis - eprints.utas.edu.au/20171/ Andrew Klekociuk: Owens Valley Solar Array - ovsa.njit.edu/ Andrew Klekociuk: Learmonth Solar radio Spectrograph - www.sws.bom.gov.au/Solar/3/2 Andrew Klekociuk: CROCS - low frequency spectra...
Drake's Lounge May 2024 - solar event, 3-element interferometer, antenna deformation corrections
มุมมอง 2092 หลายเดือนก่อน
SARA Gift Shop: saragifts.org SARA www.radio-astronomy.org Astropeiler Stockert: Thanks to David for all the work on the many conferences he organized Bob N5BRG: spaceweather.com/archive.php?view=1&day=14&month=05&year=2024 Link to photo of sun on NASA web site Bob N5BRG: spaceweather.com/archive.php?view=1&day=14&month=05&year=2024 Link to photo of sun on NASA web site Chat:
RTOP May 2024: Maser Receiver Designs, Maser flares, Antenna mounts and performance
มุมมอง 3042 หลายเดือนก่อน
SARA: www.radio-astronomy.org Chat: Ted Cline - N0RQV: en.wikipedia.org/wiki/Project_West_Ford Ted Cline - N0RQV: Phillies playing the Cubs at Wrigley Field in Chicago …. billypenn.com/2023/07/22/telstar-satellite-history-transatlantic-baseball-broadcast-phillies/ Ted Cline - N0RQV: Skip Crilly paper …. arxiv.org/abs/2404.08994 Ted Cline - N0RQV: onstep.groups.io/g/main Bob N5BRG: This link is ...
Drake's Lounge Australia Apr 2024: eclipse analysis, home RF range, galaxy detections
มุมมอง 1822 หลายเดือนก่อน
SARA: www.radio-astronomy.org CHAT: Ted Cline - N0RQV: "listserv" … www.radio-astronomy.org/email-list ….. groups.google.com/g/sara-list
Drake's Lounge Apr 2024: Eclipse Adventures
มุมมอง 1423 หลายเดือนก่อน
SARA: www.radio-astronomy.org Chat: Bob N5BRG: pswsnetwork.caps.ua.edu/home Bob N5BRG: arxiv.org Rich Russel AC0UB: arXiv.org e-Print archive Ted Cline - N0RQV: arxiv.org/abs/2404.08994 Ted Cline - N0RQV: arxiv.org/list/physics.pop-ph/recent
Nathan Butts: A Novice's Guide to Radio Astronomy
มุมมอง 4.3K3 หลายเดือนก่อน
SARA 2024 Western Conference - Dallas, Texas SARA Gift Shop: saragifts.org SARA Eb site: www.radio-astronomy.org
Dr Andrew Thornett: Detecting Cosmic Rays & Building your own version of the Large Hadron Collider
มุมมอง 3833 หลายเดือนก่อน
SARA 2024 Western Conference - Dallas, Texas www.radio-astronomy.org
Dr Andrew Thornett M6THO: Lichfield Radio Observatory - Mapping Milky Way at 1420.405 MHz (Hydrogen)
มุมมอง 6253 หลายเดือนก่อน
SARA 2024 Western Conference - Dallas, Texas www.radio-astronomy.org
Bruce Randall: IBT Eclipse and other Radio astronomy Failures
มุมมอง 923 หลายเดือนก่อน
SARA 2024 Western Conference - Dallas, Texas www.radio-astronomy.org
Felicia Lin: Mapping the Milky Way by Cross Section Data
มุมมอง 1863 หลายเดือนก่อน
SARA 2024 Western Conference - Dallas, Texas www.radio-astronomy.org
Kent Britain WA5VJB: Antennas for Radio Astronomy
มุมมอง 4273 หลายเดือนก่อน
Kent Britain WA5VJB: Antennas for Radio Astronomy
Charles Osborne: Eclipse Detection using a VLF Receiver
มุมมอง 2023 หลายเดือนก่อน
Charles Osborne: Eclipse Detection using a VLF Receiver
Dr Wolfgang Herrmann: Lunar Occultation Observation of Radio Sources
มุมมอง 1033 หลายเดือนก่อน
Dr Wolfgang Herrmann: Lunar Occultation Observation of Radio Sources
Keynote: Dr Linsay King - Gravitational Lensing
มุมมอง 1473 หลายเดือนก่อน
Keynote: Dr Linsay King - Gravitational Lensing
RTOP Apr 2024: M31 & M33 Galaxy HI Measurements
มุมมอง 1633 หลายเดือนก่อน
RTOP Apr 2024: M31 & M33 Galaxy HI Measurements
Drake's Lounge: March 2024 - Eclipse, 3D printing, HI telescopes
มุมมอง 2054 หลายเดือนก่อน
Drake's Lounge: March 2024 - Eclipse, 3D printing, HI telescopes
RTOP March 2024: FRB, masers, disk antennas, M31, filter design, HI Radio Telescope Designs
มุมมอง 2274 หลายเดือนก่อน
RTOP March 2024: FRB, masers, disk antennas, M31, filter design, HI Radio Telescope Designs
Drake's Lounge Australia Feb 2024: Radio Astronomy Education, Solar X-flare, big dish safety, muons
มุมมอง 2965 หลายเดือนก่อน
Drake's Lounge Australia Feb 2024: Radio Astronomy Education, Solar X-flare, big dish safety, muons
Drakes Lounge Feb 2024 - repeating FRB detected, Disk Yagi Testing
มุมมอง 1985 หลายเดือนก่อน
Drakes Lounge Feb 2024 - repeating FRB detected, Disk Yagi Testing
RTOP Feb 2024: Masers, FRBs, HI Antenna Analysis, 3D Printed horn, and Hi Observation Results
มุมมอง 3425 หลายเดือนก่อน
RTOP Feb 2024: Masers, FRBs, HI Antenna Analysis, 3D Printed horn, and Hi Observation Results
Drake's Lounge Australia Jan 2024: Antenna Repairs, Disk Antennas, Horn Design
มุมมอง 2825 หลายเดือนก่อน
Drake's Lounge Australia Jan 2024: Antenna Repairs, Disk Antennas, Horn Design
Drake's Lounge Jan 2024: Disk Yagi, Disk Antenna Interferometry, Galactic Hydrogen
มุมมอง 4206 หลายเดือนก่อน
Drake's Lounge Jan 2024: Disk Yagi, Disk Antenna Interferometry, Galactic Hydrogen
RTOP Jan 2024: Patch antennas, H1 Measurements, and Masers
มุมมอง 3766 หลายเดือนก่อน
RTOP Jan 2024: Patch antennas, H1 Measurements, and Masers
Just astounding! I hope to join the project soon.
Always a great gathering of extremely smart guys and gals! I enjoy it immensely and hope to gather sufficient speed and info to be able to contribute!
Thanks Whit for your excellent briefing. As in all of your research, the passion and technical skills you share are clearly evident. Cheers, Paul M
Jerry, I suggest you consider building one of the Faraday Fabric lined Photo Umbrella Antennas. Their performance is excellent and are easy to fabricate Regards, Alex th-cam.com/video/ymclkNnCeCc/w-d-xo.html
Sorry to hear about your kidney stones, Jason. Been there, done that. OOuuuuuuuucccccccchhhhhhhh!
Check out the New SARA video: th-cam.com/video/QUY5AhAoyqY/w-d-xo.html
What can beginner like me do with radio astronomy and how to make a radio telescope?!
Thank you! Great
Hey folks, will the slides be up on the SARA website? I only see the older intro materials there?
We’ve got all the information collected and will be looking to post them all on the website soon.
great presentation I've been wanting to learn more about radio astronomy and excited to see there's a group of folks out there wanting to learn and share
Excellent presentation. Thank you for this
I'm also a radio amateur but with no experience of radio astronomy. Done some Exoplanet data processing but just using MicroObservatory data. Just stumbled across your excellent presentation but any hints on where to do some beginners reading on the subject ?
Interesting. I have been intending to spend time involved in radio astronomy which is essentially what's being demostrated here & hope to with my RS 918 this spring. I am curious regarding your loop receiving antenna and if you could give me a little abstract of what its configuration is including transformer at the feed point I'd appreciate that. Thanks, Kc2wvb
Thanks, Wolfgang ... interesting topic and clear explanations
The temperature dropped 5-10 degrees F during the eclipse. That could explain the baseline shift.
This video provides great encouragement for those who are curious...
Very nice presentation Andy!
Saludos desde Mendoza, Argentina @migos de SARA...
🎉
Hey!! Thank you so much for the fantastic and in depth video!! I am at the beginning stages and will be making many returns to this post
Science Asylum did a video about building a cloud chamber 8 months ago. There are also others on TH-cam, but I have not watched any of those.
Faraday Fabric : I have used Rejopfad Faraday Fabric Nickel Copper Faraday Cloth Kit, 44 x 39Inch Conductive Material + Faraday Tape(65FT x 0.5Inch) ( Amazon ) Alex
17:55 because physics deliberately broken. Everyone is taught bs, and are now locked in and cant think out of the box.
Man made muons? This is my first visit to Australia’s NORQV, whatever that is‼
@@PahooKatawah idk what they are claiming to measure. Most sci projects are dark psyops anyways. Nobody who is not inside knows what is going on. For you to 7nderstand. I am moderately enough electrosensitive. Each time they say it a sunburst, it happens to be TSÖRN experiment or hahhaha-RP experiment. Tsörn is especially brutal.. Decifer names your self. The need for me to hide the names should tell you smth.
But better guestion, how much of the "sapce weather" is actually man made. A lot, is my guess. A lot. All I see is excuses so that they/them/reps can keep zapping us with F|AART antennas
FIAART = ? What.
@@PahooKatawah decode. hahhahah-rp. Cant name the devl w3pn. Will be removed.
@@PahooKatawah hahhaah-rp is on of the tools of a$$ destruct. Ion.
I understand. I will look elsewhere. Thanks.@@v2ike6udik
Hai amateurs. Any known home made shield for humans? Currently constant C class solar x-flare. Tin house? :) Nasty stuff to be extremely sensitive. Others are too, the are just not aware. And they are not buying it. So trick i used, i say i'm psychic and i know when they felt bad. :D "omg, yes" "evil souls... I see dark energy... Here is space weather map. You are so gullable."
They are using Faraday cage design in roofs and walls around here.
Use the Y-factor method to get better results (or liquid nitrogen)
Has anyone tried squares instead of discs in the yagi design? The manufacturing costs would, I think, be much lower.
Hi Don, in doing a bit of research, there IS an advantage to Circular over Square Comparison between a rectangular patch antenna and a circu- lar patch antenna using the simulation results obtained from CST Microwave studio has been carried out. Both the antenna configurations show quite good results on perspectives of re- turn loss, VSWR, gain and radiation efficiency, for Bluetooth band applications. However, from the perspective of return loss and gain the rectangular patch configuration shows better performance, while the circular patch configuration shows better results on bandwidth, radiation pattern,Lower Side Lobe levels. ( example of 2.45GHz Antennas ) Parameter Rectangular Circular Return Loss 28.28 dB 22.03 dB Bandwidth 24 MHz 27 MHz Directivity 7.267 dBi 7.027 dBi HPBW 72.2 deg 77.7 deg Side Lobe -10.5 dB -19.6 dB Gain 7.119 dB 6.968 dB Radiation Efficiency 97% 98% Total Efficiency 96% 97% www.ijser.org/researchpaper/A-Comparative-Study-of-Rectangular-and-Circular-Microstrip-Fed-Patch.pdf
Thanks, Alex, that was useful. The differences seem small compared to the cost of manufacturing for those who are budget conscious. I'm considering designs for 21cm hydrogen emissions, so bandwidth is not terribly important to me. The design I have been considering is a turnstile antenna as the driven element with director and reflectors being 'X' shaped and aligned with the crossed dipoles of the turnstile. I'm still figuring out how to use 4NEC2 to model it, so I don't have any predictions yet. Ultimately, I want to construct an array of 4 of these.
Don, its not band-width but Side Lobe Suppression that is the significant difference. What is the goal of having 4 antennas ? How do you wire an array ? Each should have a closely coupled LNA.
H_Line reception is not like satellite signals: With a point source, the smaller the beam width, the greater the signal, but the same will reduce H1 signals. For hydrogen line data, a narrowing beam must be accompanied by a larger antenna capture area ( big dish ) .
Yes! Thats the kind of way of presenting that keeps the average person interested all the way, thank you!
Thanks for the effort. In the equations at 41:40, did we assume that the mass inside radius R is increasing linearly until R0? More mass density near the center makes sense but i couldnt see any reason for linearity at first glance.
Fantastic collaboration of dedicated scientists! Keep up the good works!
Yagi Antenna Theory " Words of the Week " Slow Wave Structures Artificial Dielectrics lea.hamradio.si/~s53mv/cigar/sws.html Cigar Antenna History lea.hamradio.si/~s53mv/cigar/cigar.html Cigar Antenna Design lea.hamradio.si/~s53mv/cigar/design.html Cheers, Alex
Very interesting for me being an RF engineer. BTW, I had some investigations on a loop antenna with a small bandwidth, which could possibly further improve selectivity and interference resilience.
An excellent lecture on amateur astronomy. I found that my second viewing to be much more valuable than the first, as the new concepts (and math) started sinking in. As an amateur radio operator and former broadcast radio and TV engineer, allow me to expand on the motivations of many amateur astronomers. I started out as a young child as a nighttime MW-SW listener. After a while one tends to seek out more and more distant stations, referred to as "DX." In the process, antennas are experimented with, as well as receivers. Attention is paid to the ionosphere, solar activity, and RF interference. Many people experiment with QRP, or low power transmitters. There are many low power beacons out there from VLF, HF, VHF and satellites that have calibrated powers and distances. The real DX is in outer space. It is also a step up in technology and degree of challenge. Listening to a source millions of light years away is a bit more of an accomplishment than listening to one a few thousand miles away. On the subject of meteors, I believe that the radio observations are used as an indicator for optical observations. In my experience, meteor storm prediction is very similar to weather predictions. Not exactly perfect. However, using radio to detect meteor storms is real time with high precision, makes the effort to go outside on a cold night much more productive. Great lecture! Looking forward to seeing more in the future.
This is an excellent video presentation about Radio Astronomy. It is, as Jack Webb used to say "Just the Facts." It should be the template for further video presentations, as we are in a universe of information noise, and this is all information signal. Well done Sirs.
Regarding, Nathan's extended WiFi dish, drift through the Long dimension for min beam width. Antenna Beam Width measurement Run a drift scan through the Sun, record the max ampl every 10 mins or so, for +- 1.5 hours and plot Tme vs Power ( or dB ) in Excel .. The - 3dB ( half power ) points = the Beam_Width 1 hour = 15 degrees
GTP?
Thank you for bringing this on youtube. One explanation for the question posed @28:34 could be that the 60-80 degree on the Galactic plane, corresponds to the hydrogen clouds in the Cygnus constellation. This region is rich in hydrogen clouds especially around Cygnus-X region. The region around star Sadr up to Deneb is also rich in HII. Of course this is different from the neutral Hydrogen used for the 21 cm measurement. Gal degrees around 140 corresponds to the constellation of Perseus and could be from the Perseus arm of the MW.
How many dBs does the choke ring add to the SNR? I notice you only have it on the 3m and 3.2m dish pictures.
Hydrogen line observations: From frugal to advanced Part 4: Observation Results with Different Antennas Wolfgang Herrmann and the Astropeiler "Hydrogen Team astropeiler.de/wp-content/uploads/2020/01/Hydrogen_4.pdf
To measure the one way speed of light depends on how accurately time can be measured. Setup two stations with synchronized atomic clocks sending pulses of light to each other at known times. Both stations should see the same speed of light within the accuracy of the atomic clocks.
I am thinking that on the large space that encompasses the whole compound that there may some issues with the ground. The soil resistivity wont be the same across such a large area. Under all the terminals I have been a part of, there is a robust ground grid under the dish. I am a power guy though that just plays a satcomer on TV 😅.
It may well be that we need to put a ground grid under each antenna. Not only does the soil vary from place to place across the compound, but the resistivity varies depending on environmental factors such as how recently it rained. Further, this system is intended to be used in a variety of locations including across the entire US. So, the more the system can be made the same, the more easily it can be incorporated into a Very Long Baseline Interferometry system.
Have you tried replacing the RF switch with a directional coupler? You can get a better than 0.2dB insertion loss. Also, it's hard to measure low NF with this method. The uncertainty in your measurement could be more than your measurement itself.
To any amateur wondering if the two hours are worth it: Yes! :)
it would seem here that a NanoVNA would be an invaluable tool for this.
This was very helpful!!
U can provide a access to the datasets?
It is so bad that Radio Astronomy Supply is no longer selling products.
Can I use a SDRplay RSPdx software defined receiver that I use with SDRuno and SDRshart to access and operate the SUPERSID software?
this is fucking sick
*** Exec Summary *** The Coefficient of Gain Variation vs Temperature for the Sawbird+ H1 LNA : - 0.009 dB / Dg C or just remember : - 0.1 dB Gain Change / + 10 deg C