Russian Weather Satellite Follow-up (Meteor M2-3 Video #2)
Vložit
- čas přidán 9. 07. 2023
- Since last week's video on this satellite got a lot of interest, here's a follow-up! I wanted to address the most common questions from last time and correct a couple minor errors. I also wanted to try some different techniques of listening to this satellite, including different frequencies and other antennas.
More information on the satellite here: usradioguy.com/satellites/met...
More info on the image scanner system: en.wikipedia.org/wiki/Whisk_b...
This is the type of rooftop antenna I use, connected to an SDR and Raspberry Pi computer: usradioguy.com/wp-content/upl...
This is my current favorite software-defined radio for general experimenting: www.rtl-sdr.com/rtl-sdr-blog-...
For better 1.7ghz / HRPT reception, I use a SAWbird+GOES filter/amplifier gadget: www.amazon.com/Nooelec-SAWbir...
The folding satellite dish is a "Cyberex CN7500". I don't think they've been made since the '80s, but this company makes something similar: sub-lunar.com/products
I'm mostly recording satellite signals on Linux using rtl_fm, with the following settings (these might not be the best in every situation, I'm still learning how to do this!):
timeout 15m rtl_fm -M raw -s 120000 -f 137.1M -E dc -g 48 -p 1 (right angle bracket) raw_dump.raw
I'm then using sox to create a wav file:
sox -t raw -r 120k -c 2 -b 16 -e s "raw_dump.raw" -t wav raw_dump.wav
And then I process that wav file with SatDump: github.com/SatDump/SatDump
I also tried streaming from my computer with the SDR and antenna, using rtl_tcp as follows:
rtl_tcp -f 137.1M -s 250000 -b 16 -a (ip address)
And then connecting from the Recorder tab in SatDump. That seemed to work pretty well. I was told SDR++ works better as the streaming source, but could not get it to install on my Raspberry Pi.
More info on HRPT and antennas here: sgcderek.github.io/blog/begin...
I've also tried LeanHRPT, but I did my recording wrong for that: www.rtl-sdr.com/leanhrpt-a-se...
(UPDATE: I heard that Meteor M2-3 switched BACK to 137.9mhz after I made this, but who knows which frequency they'll finally settle on).
Saveitforparts t-shirts and other merch at saveitforparts.myspreadshop.com/
Join this channel to get access to perks:
/ @saveitforparts
Or support me via Patreon at / saveitforparts
If the Earth was flat, cats would have already pushed everything off the edge.
"Try to learn something every day." Words to live by.
Absolutely love this guy. Giving me the old cody's lab vibes
Before I found this channel I never even knew it was possible to just set up an antennae and listen to satellites. Even though google earth in VR exists this is still interesting stuff!
You should never feel the need to justify why you are doing this. It's awesome and you have so many subscribers and viewers for a reason.
Back in mid 80's I had a Radio Shack Color Computer3. I came across a program in Rainbow magizine called " WEFAX " Weather facsmile. I had to buy a shortwave radio to pick up the signals. I forget which sat it was but it scanned one line at a time and filled the screen after 12 minutes. Was so cool then to be able to do that.
My question is, what's the point of people asking "what's the point of doing these things"? It seems self-evident to me, and that's a terrible question they're asking. This channel is just awesome!
I am really impressed that you were able to get the higher frequency signal captured! Also huge props to you for churning out so much content. It isn't an easy job and I think I've gathered it isn't your day job, either. I'm glad you are able to make time to have fun and also make the effort to edit and share it with us.
Something to know about LNAs. They work best when they're right up at the feed horn. Having more than 10-15cm of cable between the horn and the LNA turns your LNA into a kinda-ho-hum LNA. Now, in practice, this may not matter that much if you're looking at signals that are fairly strong, into a dish that's fairly large. But it's something to keep in mind.
I think the thumbnail from the first video was a big reason as to why it did so well. It’s fantastic for getting peoples attention and interest. Plus the title of course, with Russia being such a topic at the moment.
Images from these satellites are often used by russian cargo ships in Arctic to monitor ice fields during navigation season. Unlike weather, you can't get that information from other sources rather than satellite. Very useful.
This has quickly become my new favorite channel, and I’m now eyeing various scraps around the house for an antenna. 😂
You may be stumbling your way through these things, But your light years ahead of me! Great video...keep up the good work.
Love to see more people using the RPi for radio stuff! Looks like the foundation is ramping up production as many stores seem to have them in stock now. Thanks for another fun and interesting video!
You don't have to explain your reason for a hobby. It's something you like doing -- that's what a hobby is. Some people like to color, some people like to paint, sew, crochet, and so on. I personally enjoy doing a lot of the radio / antenna experiments that you do -- hence I found your channel -- and I also love audio equipment, old computer stuff, SBCs, etc etc etc. It's curiosity about what's out there and how things work -- that's what drives people like you and me and your viewing audience. Nope - you don't have to explain it to us - we get it :)
The radio and satellite videos are always inspiring. My current challenge is to capture signals like that from my small apartment window. It's tough, but also fun!
Can't tell you how excited I was to see your newest vid pop up on my feed. Great stuff!
I love the extra info you provided in the description for others to try this as well
The stuff you do is very awesome and love that you try to link everything you use so people can learn and use it too!
Awesome tech and awesome content. Not only are you learning all about this but you’re helping countless others learn from your experience!