My HRPT setup + Receiving NOAA-18 || Satellite reception pt.7

Рет қаралды 12,814

Күн бұрын

First of (hopefully) many videos regarding HRPT reception from weather satellites, including a practical demonstration of my setup receiving an image from NOAA-18.
Links:
My website and other social media - sgcderek.github.io/
HRPT demodulator - github.com/Xerbo/LeanHRPT-Demod
HRPT decoder - github.com/Xerbo/LeanHRPT-Decode
Timestamps:
00:00 - Intro
01:34 - Hardware overview
08:22 - Pre-pass checks
09:35 - NOAA-18 HRPT (bad audio)
19:38 - Recording review
20:50 - Decoding and image review
24:10 - Outro

Пікірлер: 51

@sashatim8250 Жыл бұрын

You were the person who inspired me to first receive HRPT a couple years ago. Thanks and 73 from VE3SVF!

@dilushasamarasekara9533 Жыл бұрын

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...

@MichelGreijmans Жыл бұрын

I've been looking for a video like this, thank you for your effort, and I'm looking forward to the follow ups!

@DearNoobs Жыл бұрын

thanks for explaining all this, You've inspired me to do this aswel! thanks

@prillewitz 11 ай бұрын

Very nice picture, even The Netherlands are on it!

@benklerk1 Жыл бұрын

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.

@stoatrepublic 11 ай бұрын

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.

@kirknelson156 Жыл бұрын

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. :-)

@SlawekKlimek55 Жыл бұрын

Nice signal. Remember you are not only one with this kind of "mental ilness" :)

@cliffbarrimore 5 ай бұрын

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?

@Grip_ItandrRip_It 11 ай бұрын

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?

@EA4GDK Жыл бұрын

Congratulations, very instructive. Could you give me more details of the system you use to orient the dish with the tripod. Thank you.

@dereksgc Жыл бұрын

I'll try to include a more detailed look on it in the MetOp video

@billgc7568 11 ай бұрын

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?

@dereksgc 11 ай бұрын

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

@MarkPentler 7 ай бұрын

@@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

@MarkPentler 7 ай бұрын

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.

@andreas14190 10 ай бұрын

@dereksgc does the LNA have to be near antenna? or i can use 2m coax and LNA at the other end next to SDR?

@dereksgc 10 ай бұрын

It needs to be as close to the antenna as possible, with as little loss between antenna and LNA as possible

@w4rkvs Жыл бұрын

Should I use quadrature sampling or direct sampling (L-Band) for the baseband recording in SDR# with my RTL-SDR V3? Thanks

@dereksgc Жыл бұрын

Quadrature, direct sampling is only used at very low frequencies (effectively bypasses the tuner)

@FireBladeFedy 6 ай бұрын

where kind i find the helix plans and 3d files?

@eswnl1 Жыл бұрын

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?

@dereksgc Жыл бұрын

I've mostly stopped caring, already done HRPT in a city parking lot and it was alright. twitter.com/dereksgc/status/1647892435706552320

@maximus6884 Жыл бұрын

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.

@maosolny5856 Жыл бұрын

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.

@dereksgc Жыл бұрын

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

@dereksgc Жыл бұрын

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)

@maosolny5856 Жыл бұрын

@@dereksgc i will wait for it :) love your work btw

@MrRObot-bin Жыл бұрын

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?

@dereksgc Жыл бұрын

You can find links to socials and extra content on sgcderek.github.io

@jozefsoucik3115 11 ай бұрын

bolo by zaujimave, ak by si k tomuto ucelu vyrobil nejaky follower pomocou dvoch motorov (NEMA?) na elevaciu a rotaciu

@supriyono2723 11 ай бұрын

Dereksgc, what that the device that you install after the helical antenna? Could you show me the brand-named?!

@MarkPentler 7 ай бұрын

Nooelec Sawbird GOES, there's a plus and non-plus version which have different gain but also different power requirements.

@scogiam95 10 ай бұрын

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?

@MarkPentler 7 ай бұрын

Absolutely not, you need the directional gain

@itrstt66 Ай бұрын

can you get like military intel typehigh quality zoomed in images?

@dereksgc Ай бұрын

@lukmly013 Жыл бұрын

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

@dereksgc Жыл бұрын

You can try it, and it may work especially with smaller dishes (50-60cm). But just set your expectations correctly

@MarkPentler 7 ай бұрын

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

@ethonwilles7043 Жыл бұрын

Could you share the helical antenna scaffolding stl?

@dereksgc Жыл бұрын

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

@ethonwilles7043 Жыл бұрын

@@dereksgc also, what type of material for the coil? Copper rod?

@dereksgc Жыл бұрын

@@ethonwilles7043 solid core copper wire with stripped insulation

@ethonwilles7043 Жыл бұрын

@@dereksgc best way to bend the copper into shape? plus, what gauge?

@dereksgc Жыл бұрын

@@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