/r/amateursatellites
A subreddit dedicated to artificial satellites that the everyday folk can interact with, but topics relating to all kinds of man-made satellites are welcome
A subreddit dedicated to artificial satellites that the everyday folk can interact with.
/r/amateursatellites
Im getting a analog telemetry error from meteor m2-4 my setup is right so idk if its meteor or me
At 1.440 GHz, using a Gps patch antenna
Since LignoSat has been deployed, here is the information I have found to communicate with it.
Its Uplink and Downlink frequencies are 435.820 FM.
Its modulation is 4k8 GMSK AX.25 Packet, returning your callsign in CW.
Does anyone have a link to an encoder/decoder to communicate with it?
Sources:
https://www.ne.jp/asahi/hamradio/je9pel/satslist.htm
https://iaru.amsat-uk.org/formal_detail.php?serialnum=847
http://space.innovationkyoto.org/wp-content/uploads/2021/06/210629_LignoSat_Without_Logo.mp4
I've been thinking about this idea for a while now but finally found an affordable listing for just the reflectors on ebay and they looked identical to the Nooelec GOES dish I have now. I was planning on removing the current dish and sliding this one under the other, aligning the bolt holes, and then tighten them down together. But after mocking it up the signal improvement was more than expected, so Im going to leave it zip-tied for now lol.
Here's an image of the setup, I just zip-tied the extra reflectors at the top and bottom. Their curvature, even turned 90 degrees to the first reflectors, fits nearly perfectly.
Definitely a worthy upgrade in my opinion. I havent tested it yet but I bet the vertical sensitivity is better now. With the old dish, because the reflector was wider than it was taller, you could be more misaligned on the azimuth axis and still get good signal compared to the elevation. Azimuth could be over a degree off and the signal wasn't too much worse but a degree off on the elevation would be a much bigger signal drop. I will have to test when I have more free time.
Hi everyone!
I'm creating a satellite tracker app at obito.space and wonder if this could be of interest to you?
It's at a very early stage and quite experimental, but I would love to hear your thoughts!
The UI is currently quite messy but don't be afraid to just play around with it.
Some of the current features are: time control, reference frames, earth/satellite shadow, data source selection and color grouping.
Please let me know what you think or if you have any ideas!
Will we be able to receive solar imagery from the new CCOR-1 via the GOES-19 downlink frequency?
Pretty neat
As mentioned previously in a few other threads, we are going to plan to do a HUGE LEO projection (of both HRPT and LRPT data) on November 30th OR December 1st. We haven't fully pinned that down yet and captures from the same day from everyone would be preferable.
We are also planning to do test captures over November 16 & 17th. This is a chance to pin down your settings (especially if you are new to this or coming back now that we have things like SatDump) and a chance for us to evaluate coverage and merging techniques.
We think we are covered in terms of stations from the west coast of the US all the way over to the western edge of Asia (thanks to those who replied last time!), but there still a few gaps it'd be nice to fill. Therefore if you are in the following areas and can help please let us know here:
You will be required to capture your passes and supply either a zip file with your full SatDump dataset (feasible on LRPT) or the raw CADU/RAW16 files so we can process them ourselves (better for HRPT probably). You can use any server you like that we can download from, including any file sharing services if you need to. A site like Swiss Transfer gives you tons of space for an upload (50 GB!): https://www.swisstransfer.com/
If you only capture APT I'm afraid we'll have to pass on your captures - we're after the better quality and higher amount of channels here. If you'd like to try LRPT and need advice then we can absolutely help here!
Coordination on the day will be carried out on the Discord server of DerekSGC, which you can find linked here: https://sgcderek.github.io/ - this does not mean we can't chat about things and provide help in this thread, though. Feel free to ask away.
Hopefully we'll be able to build on images like this 221 from yesterday, captured by 4 people over 10 total HRPT and LRPT passes from Meteors M2-3 & M2-4. NOAA 19, and MetOps-B and C:
Wide area projection of the Atlantic, Europe, Western Asia and North Africa and the Middle East
I cant really get any signal from meteor m2 even when its 80° elevation im using satdump and rtl v3 and a dipole set to the right lenght(54cm)
Hey everyone!
I just finished building my QFH antenna, and when I tried to receive from the NOAA 18, I only received a nearby FM station. This happened while also using my Sawbird + NOAA filter, without it I couldn't receive anything. How is this even possible? Why did I receive it at 137MHz? What could be the issue?
Thanks in advance...
Hi juat wondering can i get a signal from the meteor series with an v dipole
High elevation of NOAA 19 satellite pass descenting from north to the south, rtlsdr disconnected but when resumed i lost a part of southern aegean and Libyan Sea and satdump somehow stitched the old and resuming transmission in one image hence the abrapt cut an the bottom
Setup :
120cm offest dish
RTL-SDR v4
LNA - Sawbird+goes
derekcz's helical antenna at 1700Mhz LHCP (printed with PETG)
link for his design: https://www.thingiverse.com/thing:4980180
New guy here! I've been able to pull down a few images with satdump and I definitely feel like I'm getting the hang of it. One thing I noticed when watching some youtube videos about satdump is it comes with a nasa_hd.jpg layer for projection purposes, but when installed on a mac it doesn't seem to be there.
Anyone know where I can grab a copy of that image? Googling is failing me so far.
Thanks in advance!
Trying to set a schedule for different sats. What is your experience with this bird? Best during the day or night.
Hi all, just started off with this fun hobby, built a qfh and running a rtl-sdr v3 on raspberry pi. No lna or filters.
2 questions:
As can be seen in attached pic, I consistently only get roughly the middle 30% of the pass. Is this antenna design, settings or just plain line of sight to horizons?
Can a qfh be tested with a nano vna? Asking because i did plug it in but it shows a-lot of dips in swr, not the usual straight one line with a dip like linear antenna.
Thanks!