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ISS SSTV end of year: https://ariss-sstv.blogspot.com/2021/12/ariss-end-of-year-sstv.html
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Dec 14, 2021 23:00
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ooo ty. ill give er a shot
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Dec 15, 2021 18:23
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All the ISS pass predictions I can find are filtered by visible passes (at night). I want to try this during the day, is there a site that will show me daytime passes?
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Dec 15, 2021 18:59
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Mantle posted:All the ISS pass predictions I can find are filtered by visible passes (at night). I want to try this during the day, is there a site that will show me daytime passes? heavens above: https://www.heavens-above.com/PassSummary.aspx?satid=25544
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Dec 15, 2021 19:01
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Anyone have a good setup to test sstv before the upcoming iss broadcast? I'm starting from scratch with nothing setup.
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Dec 20, 2021 02:31
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yes! hello! what do you have available to you? antenna, radio etc? an antenna for this can be as simple as a 1 or 2 metre pole with a horizontal dipole arranged in a V shape, such as this one made for weather reception, which you’d adjust the length on for the 145.8 ISS downlink: https://www.rtl-sdr.com/simple-noaameteor-weather-satellite-antenna-137-mhz-v-dipole/ but unlike weather satellites the ISS is so powerful a signal you can get away with a much less capable antenna. software: MMSSTV probably easiest. the audio pipe is the key. thehustler fucked around with this message at 09:22 on Dec 20, 2021 |
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Dec 20, 2021 09:18
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I have a MacBook, an rtl-sdr with dipole tv rabbit ears type antenna, and a TH-D72 with rubber duck antenna. I also have access to my apartment rooftop and could drive out into the mountains. I wouldn't have Wi-Fi on the roof but I could tether my phone for low bandwidth comms.
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Dec 20, 2021 09:23
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comms not really needed as long as you download all of the satellite TLE position files before you leave the house  your rabbit ears may not be long enough to make a half-wave dipole for 145.8. but again, such a strong signal it shouldn’t worry. set those up at an angle of 120 deg as the link I posted shows. short coax run to the rtl stick, short as possible while keeping it away from the laptop - maybe 5M or so? or does the rabbit ears kit have a coax attached already? i never had that so I’m not sure. if you install VB Cable or something similar that’d be the next step and then we can move onto the actual decoding software
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Dec 20, 2021 11:24
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I was unsuccessful in getting a signal from the ISS this morning, following the instructions in this thread. Does it look like my SDR setup was right? I heard a lot of white noise so is it just the case that my noise floor was too high in the city center, even if I went onto the roof of my condo? https://imgur.com/a/LKAMZgz
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Dec 28, 2021 02:22
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it looks like you have a super strong carrier a few khz down, i'm wondering if that wasn't the ISS. They use a 50 watt transmitter and to state that you should be able to get ISS full scale with a wet noodle for an antenna isn't an exaggeration. How confident you are on the frequency/ppm calibration on this lil thing? I use the NOAA weather stations as that usually lets you get within a PPM or so.
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Dec 28, 2021 02:25
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Jonny 290 posted:it looks like you have a super strong carrier a few khz down, i'm wondering if that wasn't the ISS. They use a 50 watt transmitter and to state that you should be able to get ISS full scale with a wet noodle for an antenna isn't an exaggeration. How confident you are on the frequency/ppm calibration on this lil thing? I use the NOAA weather stations as that usually lets you get within a PPM or so. I had a listen to the other carrier and it sounded like packet to me. I have an idea what SSTV sounds like since I tested my decodes with some sample SSTV recordings. It could be that I just missed the window? I think the heavens above timings are just estimates right? When I checked reception of some broadcast AM radio it looks dead on. What is PPM in this context? I think every other setting is correct, NBFM, 12.5khz bandwidth, 145.800khz frequency?
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Dec 28, 2021 07:42
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Mantle posted:I had a listen to the other carrier and it sounded like packet to me. I have an idea what SSTV sounds like since I tested my decodes with some sample SSTV recordings. i cheat and use the nasa app in ar mode to direct my yagi you’ll likely see some doppler shift in the signal as the station traverses the horizon; just keep an eye on the carrier and make sure it’s not drifting out of your decode band just got this on the pass over the northeast: 
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Dec 28, 2021 15:12
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there’s no empty carrier between images, just fully off, if that helps! you’ll just hear static heavens above is very accurate if your position info is entered correctly. they are predictions, but with some maths behind them edit: there seems to be a very tiny hump at 145.800 though, that has to be something?
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Dec 28, 2021 16:14
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today I learned about VE7KFM can't believe I share a province with this rear end in a top hat. also surprised no one's complained to Industry Canada enough to have his license revoked, though I suspect he'd keep blasting nonsense into the aether without one
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Dec 31, 2021 13:33
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paging dr. 290, dr. 290 to the insane shortwave poo poo ward ukrainian radio pirates have intermittently taken over the Buzzer (UZB-76)'s frequency and have been blasting music and anti-Putin slogans over it. it's back to buzzing now but a couple minutes ago they were playing Red Hot Chili Peppers lmao
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Jan 20, 2022 02:34
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yah somebodys streaming it lol https://www.youtube.com/watch?v=fUgzv-8_EMc
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Jan 20, 2022 02:36
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Don't miss out on this! https://houston.craigslist.org/ele/d/hockley-antenna-tower/7434963560.html https://imgur.com/a/33peVYX I swear, I used to be a web developer, but I can't figure out how to embed an image... vvvvvvv exactly... namlosh fucked around with this message at 19:48 on Feb 12, 2022 |
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Feb 12, 2022 19:39
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lol. the $5,000 is what they're paying me to risk my life disassembling a dangerous structure that i don't know the actual condition of, right? Right?
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Feb 12, 2022 19:40
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ms jones got me a trav-ler 5910 and it's so rad. it even has a terribly swollen and nasty B battery if i want it to turn on it'll probably need a pretty intense restoration but holy crap is it cool. it's from 1947
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Feb 15, 2022 05:23
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the russian invasion is doomed to fail they're using baofengs https://twitter.com/mil_in_ua/status/1497961913292001283?s=21
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Mar 1, 2022 19:29
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baofeng owns
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Mar 1, 2022 21:17
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it does, but it's probably not a great idea for a military force to be using an unencrypted communications channel that you can intercept with anything from a AWACS plane to a raspberry pi. great for ukraine though.
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Mar 2, 2022 02:41
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since the invasion began there have been Russian speakers in the websdr chat live translating Russian military comms cutting edge warfare: it’s pretty lmao
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Mar 2, 2022 02:47
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Pretty cool that my half-assed rig setup in my basement could jam a city's worth of Russian Baofeng-equiped soldiers.
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Mar 2, 2022 03:22
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Relevant to this thread because amateur radio is the most likely group to want to connect multiple devices which could saturate a USB 2 bus to a system, by way of using 5 RTL-SDRs at the same time: Because the USB IF is a garbage fire of a consortium, USB 2 and 3 protocols, while they can be transmitted over the same cable, are completely separate from each other, to the point where they're going down different wires. This means that even though USB 3 supports 5 gigabits of bandwidth, it's completely separate from USB 2 devices. You can't have multiple USB 2 devices connected through a hub to a USB 3 port and have their aggregate throughput exceed 480 megabits. However, some anime has cobbled together a board which uses a cursed chip that bridges USB 2 devices to the USB 3 bus, which absolutely violates the USB spec which explicitly doesn't allow you to do this, but gently caress them. https://notabug.org/niconiconi/vl670/src/usb-b
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Mar 11, 2022 19:16
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Not sure if there's anything worth anything here, but I thought of this thread: https://hibid.com/catalog/355315/storage-105-estate-annalee-longaberger-scanners/?cpage=4&ipp=100 It's an auction in TX with like 300 scanners and old radio equipment.
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Mar 15, 2022 04:43
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quite the stash. nice find! i kinda want one of the weird sony ones
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Mar 17, 2022 19:36
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i bought a th-d72a from mantle and immediately got sick before i got a chance to really play with it. it owns so far though and im really excited
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Mar 17, 2022 20:01
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https://nediv.arrl.org/2022/03/26/haarp-on-the-air/  HAARP is active overnight US time for a NASA aurora rocket launch
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Mar 29, 2022 15:10
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Jumped on and shat out some SSTV today https://twitter.com/sstvfeed/status/1510336271033511946 No contacts, but glad I got spotted and the radios and antennas are working fine after 4 months of not being touched!
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Apr 2, 2022 21:29
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Jonny 290 posted:Jumped on and shat out some SSTV today still more action that the average goon
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Apr 2, 2022 21:35
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Double posting, deal with it: QST QST QST Just a heads up to you ham nerds that AG0ON has an upcoming meeting on April 24th, 2022 at 1900 UTC (1500 Eastern). More details will follow regarding where the meeting will be held and all that jazz. If you have any topics that you'd like to see addressed during the meeting, please post them here or let me know on Discord.
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Apr 19, 2022 22:21
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https://www.youtube.com/watch?v=qnqmzF_wG4U
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May 17, 2022 06:52
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This is exactly why I got my license. Can't find anyone near me to connect with though...
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May 17, 2022 08:33
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receiving lots of CB radio transmissions on my SDR this evening! i checked months ago and hadn't heard anything, but band conditions must be different now
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May 19, 2022 03:15
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dumb question, what country are you in? cause in some countries (US etc) it's 27mhz high HF stuff, and some it's 465 MHz uhf stuff
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May 19, 2022 03:16
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the US, it's the HF one! none of these signals have been single-sideband, all AM. also, their radios play fast and loose with the carrier frequency, and you can sometimes see 2 or 3 different carriers when these fellas talk over eachother
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May 19, 2022 03:32
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Correctamundo. Cheap CB rigs just kind of ballpark the freq. There is a BIG rear end 10 meter opening today; CB is just below that, so if you see lines on this map, you'll hear signals down on CB. https://www.dxmaps.com/spots/mapg.php?Lan=E So far it's shaping up to be a hot summer and I actually have a temptation to put my 6 meter beam up as this season* seems to be starting out hot * what this is is "sporadic-E" propagation. It shows up most strongly in the summer, with a second opening in the winter, and the coolest thing is that even to this day science has no explanation for why it happens. It just does. My current record is Denver to the Canary Islands on the 6 meter band during a particularly hot eskip opening. e: screenshot of the opening right now as this page is dynamic. this is one of the more epic openings i've seen. 
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May 19, 2022 03:34
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Jonny 290 posted:Correctamundo. Cheap CB rigs just kind of ballpark the freq. i didn't know this was caused by sporadic-E! i thought it was just skywave propagation improving with the solar cycle. thank you for teaching me something new about radio, jonny 290
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May 19, 2022 03:53
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is there any way to get a notification when sporadic e is happening?
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May 19, 2022 21:48
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