Once again very nice, informative video... Thank you for your contribution to the community, many newcomers to HRPT would really appreciate this practical demonstration as to how to hand track...
I'm really hoping somebody will make an in depth long video about receiving NOAA Satellite Transmissions... Really pleased that the Stoat Republic(Norfolk, UK) is visible in this video, 73 de M0VCX.
@@ethonwilles7043 You can find more info here: sgcderek.github.io/tools/helix-calc.html Te bend it into shape I wrap it around any cylindrical object that has a slightly smaller diameter than the final helix, because it will expend slightly after bending. It's illustrated in the thingiverse page gallery
A cool idea: I know this is counter intuitive. But do one loong vidoe where you do not use any ready made tools to demodulate and decode wireless IQ data from the satelite. Do it all on your own code on a Jupyter notebok. People WILL watch! Finally, save the image to disk. That will be a hit.
Do you think going without the tripod could affect it badly? I am thinking about just putting the dish on ground and aiming it that way. Still, I guess my biggest issue is people. Walking through a city with satellite dish will feel weird xD
It works for me but raising the dish off the ground does lower the noise floor a bit. May just be the cable position, I need to work on reducing some USB noise. Max SNR 11-14dB. photos.google.com/share/AF1QipO74qtIZdaF0VDX3QptHo2KI2JMdLEfUeNHlMovRHcZQZZ5cUIwm5IK6BjguM1gnQ?key=VS1MWW5ZMnliaTExTmczcEIyMTh3ZE13VVo2VG5B
I've always been using the 137 mhz downline from NOAA 18, had no idea how much better the HRPT downlink would be. going to see if I can do this as well. :-)
Another great video. I'm still planing to go to L-Band at some point. Exchange rates are really bad for me at the moment as I would have to import most of the items I need. For me to get a clear view I will have to go motorized on top of my roof as I live on a slopping block. But, I'm looking at 1.9m dish size, maybe 2.4m.
I think, that i get good results on noaa apt. Its is time to try somethink new, but are they any geostacionary satelites that can i reach in europe? beacause trackink manualy looks hard to me, specally when i live in a big city.
The GEO situation in Europe is bad. Elektro-L N3* transmits LRIT, but only once every 3 hours, and it can be hard to find a place with direct line of sight to this satellite. There is also GOES-13 but I estimate it requires at least 150cm dish antenna, or 180cm if you want good results EDIT: Elektro-L N3, not N2
I have some ideas for more compact HRPT antennas that would be suitable in a city, may make that video soon (after video about metop and helix building tutorial)
Hey, good video, I have a question, the focal point of the dish, should that be focused on the rear of the helical by the feed point or the front of the helical turns?
Thanks for great instructions. They are probably the best thing to find at the moment. I would have one question. On your blog I read, Sawbird LNA is directly connected to the feed, using and short piece of coax is connected AirSpy Mini. The SDR is then connected to laptop with and 5m USB 2.0 active extension cable. In this video, LNA is also directly connected to the feed, then the quality coaxial cable is up to the laptop and there is SDR, connected by a short USB to the laptop. Do you recommend this setup now, based on your experience?
I switched to a different laptop which seems to be producing more noise over the USB lines, so just having longer coax is better in this case. Sadly this is something that doesn't have one definite answer and requires some experimentation. The coax doesn't need to be particularly high quality though, just regular 75 ohm sat TV cable is fine
@@dereksgcthat stuff often has better loss at this frequency too, so if you have it lying around it's worth it. Not very bendy though. I use RG-59 for ADS-B with good results. But that's 700 MHz lower
Thank you i really love your channel! Even more, i am currently studying electromagnetic theory and this kind of videos just pumps fuel into my veins to keep studying. greetings from Mexico! Do you have social media?
You were the person who inspired me to first receive HRPT a couple years ago. Thanks and 73 from VE3SVF!
Once again very nice, informative video...
Thank you for your contribution to the community, many newcomers to HRPT would really appreciate this practical demonstration as to how to hand track...
Congratulations, very instructive. Could you give me more details of the system you use to orient the dish with the tripod. Thank you.
I'll try to include a more detailed look on it in the MetOp video
Very nice picture, even The Netherlands are on it!
I'm really hoping somebody will make an in depth long video about receiving NOAA Satellite Transmissions...
Really pleased that the Stoat Republic(Norfolk, UK) is visible in this video, 73 de M0VCX.
5:42 “unless you don’t want to be seen by other people”.
So how do you feel when you are standing in the middle of that field?
I've mostly stopped caring, already done HRPT in a city parking lot and it was alright. twitter.com/dereksgc/status/1647892435706552320
This is an awesome series. I have a similarish TV dish that I want to try this with, but I don't have a tripod to hold it. What kind are you using?
Could you share the helical antenna scaffolding stl?
Source code for OpenSCAD here (recommended): github.com/sgcderek/dsgc-helix-scaffold/blob/funny/dsgc_helix_v5.scad
Pre-rendered stls here:
www.thingiverse.com/thing:4980180
@@dereksgc also, what type of material for the coil? Copper rod?
@@ethonwilles7043 solid core copper wire with stripped insulation
@@dereksgc best way to bend the copper into shape? plus, what gauge?
@@ethonwilles7043 You can find more info here: sgcderek.github.io/tools/helix-calc.html
Te bend it into shape I wrap it around any cylindrical object that has a slightly smaller diameter than the final helix, because it will expend slightly after bending. It's illustrated in the thingiverse page gallery
can you get like military intel typehigh quality zoomed in images?
no
Dereksgc, what that the device that you install after the helical antenna? Could you show me the brand-named?!
Nooelec Sawbird GOES, there's a plus and non-plus version which have different gain but also different power requirements.
There's any fixed antenna, i mean an antenna which you don't need to manually move in order to track the satellite, capable of receive HRPT signals?
Absolutely not, you need the directional gain
A cool idea: I know this is counter intuitive. But do one loong vidoe where you do not use any ready made tools to demodulate and decode wireless IQ data from the satelite. Do it all on your own code on a Jupyter notebok. People WILL watch! Finally, save the image to disk. That will be a hit.
@dereksgc does the LNA have to be near antenna? or i can use 2m coax and LNA at the other end next to SDR?
It needs to be as close to the antenna as possible, with as little loss between antenna and LNA as possible
Do you think going without the tripod could affect it badly? I am thinking about just putting the dish on ground and aiming it that way.
Still, I guess my biggest issue is people. Walking through a city with satellite dish will feel weird xD
You can try it, and it may work especially with smaller dishes (50-60cm). But just set your expectations correctly
It works for me but raising the dish off the ground does lower the noise floor a bit. May just be the cable position, I need to work on reducing some USB noise. Max SNR 11-14dB.
photos.google.com/share/AF1QipO74qtIZdaF0VDX3QptHo2KI2JMdLEfUeNHlMovRHcZQZZ5cUIwm5IK6BjguM1gnQ?key=VS1MWW5ZMnliaTExTmczcEIyMTh3ZE13VVo2VG5B
Can you capture ufo activity on this
Absolutely
Why mental illness in your thumbnail?
I've been looking for a video like this, thank you for your effort, and I'm looking forward to the follow ups!
I've always been using the 137 mhz downline from NOAA 18, had no idea how much better the HRPT downlink would be. going to see if I can do this as well. :-)
Another great video. I'm still planing to go to L-Band at some point. Exchange rates are really bad for me at the moment as I would have to import most of the items I need. For me to get a clear view I will have to go motorized on top of my roof as I live on a slopping block. But, I'm looking at 1.9m dish size, maybe 2.4m.
where kind i find the helix plans and 3d files?
I think, that i get good results on noaa apt. Its is time to try somethink new, but are they any geostacionary satelites that can i reach in europe? beacause trackink manualy looks hard to me, specally when i live in a big city.
The GEO situation in Europe is bad. Elektro-L N3* transmits LRIT, but only once every 3 hours, and it can be hard to find a place with direct line of sight to this satellite. There is also GOES-13 but I estimate it requires at least 150cm dish antenna, or 180cm if you want good results
EDIT: Elektro-L N3, not N2
I have some ideas for more compact HRPT antennas that would be suitable in a city, may make that video soon (after video about metop and helix building tutorial)
@@dereksgc i will wait for it :) love your work btw
Hey, good video, I have a question, the focal point of the dish, should that be focused on the rear of the helical by the feed point or the front of the helical turns?
thanks for explaining all this, You've inspired me to do this aswel! thanks
Nice signal. Remember you are not only one with this kind of "mental ilness" :)
bolo by zaujimave, ak by si k tomuto ucelu vyrobil nejaky follower pomocou dvoch motorov (NEMA?) na elevaciu a rotaciu
Should I use quadrature sampling or direct sampling (L-Band) for the baseband recording in SDR# with my RTL-SDR V3? Thanks
Quadrature, direct sampling is only used at very low frequencies (effectively bypasses the tuner)
Thanks for great instructions. They are probably the best thing to find at the moment. I would have one question. On your blog I read, Sawbird LNA is directly connected to the feed, using and short piece of coax is connected AirSpy Mini. The SDR is then connected to laptop with and 5m USB 2.0 active extension cable. In this video, LNA is also directly connected to the feed, then the quality coaxial cable is up to the laptop and there is SDR, connected by a short USB to the laptop. Do you recommend this setup now, based on your experience?
I switched to a different laptop which seems to be producing more noise over the USB lines, so just having longer coax is better in this case. Sadly this is something that doesn't have one definite answer and requires some experimentation. The coax doesn't need to be particularly high quality though, just regular 75 ohm sat TV cable is fine
@@dereksgcthat stuff often has better loss at this frequency too, so if you have it lying around it's worth it. Not very bendy though. I use RG-59 for ADS-B with good results. But that's 700 MHz lower
Also this is my conundrum. I have quite bad noise so I'm going to mount my SDR-off dish and try some coax instead.
Thank you i really love your channel! Even more, i am currently studying electromagnetic theory and this kind of videos just pumps fuel into my veins to keep studying. greetings from Mexico! Do you have social media?
You can find links to socials and extra content on sgcderek.github.io