Re: Himawari and JCSAT-2B, a bit of searching shows it uses a DVB-S2 receiver on C band using something called "KenCast Fazzt" software, so it's sending IP packets. Also thanks for covering options from the whole globe, not just Europe & hi from Australia!
*_"If you are at like more or less Z degrees inclination which means directly above the equator your orbital period will more or less match the rotational period of the earth meaning that with respect to the ground the satellite is is basically standing in the same spot 24/7"_* Arthur C. Clarke got that *_RIGHT In 1945!!!_* Back in the mid 1970's my neighbor and I built a system to receive *_SMS GOES 2!_*
Thank you for a very informative video. I am an old man but new to this hobby and your videos have been quite informative. Thank you very much for sharing.
Great video! Do you think Elektro L2 transmits LRIT or HRIT? Im in the UK so don't think I will get L3 here as looks like I am right on the edge of coverage. Cheers!
No, unfortunately there seem to be issues with this satellite that among other things prevent it from transmitting LRIT and HRIT in the 1.7 GHz band. Images can be received in the X-band at 7500 MHz but the setup for that is a lot more complicated and would require a very large dish antenna in the UK
@@dereksgc Thanks for the reply! Much appreciated! So there are no GEO weather sats I can decode from the UK do you think? BTW, you have such great content and you appear to have extensive knowledge of this topic, thanks for sharing your knowledge. Matt
I have a 1m dish antenna (no offset) that I found in a dumpster in Czechia and I want to try to receive Elektro L3 with it, but it has very short amount of space between the boom (idk that thing that holds the feed) and the antenna itself. I think I'll try to make an extension from some sort of mesh (to make it 1.2-1.4m diameter), but I don't think I can fit a helical feed inside. Do you think the double cross would work fine with that? Or is there something else I can do?
Very good video, seems to cover it all. I think you missed out CMAcast - China’s equivalent of Himawaricast. But that’s encrypted anyway. Elektro L3/4 seems to be the best option really, if it wasn’t for the over exposed images. As for GOES 15, I assume it will stop short of GOES 13. Otherwise they have to move GOES 13 out of the way if GOES 15 takes its position.
13 and 15 could share the same spot (or near enough to not interfere with each other), but it is also possible 13 will just be retired because its imager has degraded
ok so how does european meteosat get there information down to earth,because that is what i am missing in your story. And i know there is a eumeteocast service on 10 East i believe, you can get some hardware and a software license key and decode that information.
They use dishes in excess of 10m diameter. Meteosat-11 and earlier use 1.7 GHz but at very little power, Met-12 will use 26 GHz. Eumetcast is a solution but requires a costly receiver and much more involved hardware setup
Thank you for this video; I'm just starting with SDR stuff and receiving NOAA APT. I'm from India and have a C band LNB and a 6-foot dish. I am interested in INSAT 3D. If you could share more information(How I can connect C band LNB with RTL SDR dongle), that would be very helpful.
I have a video on connecting ku-band LNBs to an SDR, C-band is the same thing, just doesn't use the multiple LO. Also have videos on the bias tees I used to power them. Not sure if RTL-SDR is enough for insat imager, but it should work for the infrared sounder downlinks if you actually can get it strong enough.
Can you get any signal from Hubble telescope of James Webb telescope? What I am curious is, HST, the orbital period is like 90 minutes. For the earth bound telescopes, we have about 12 hour night sky. For HST, it's only 45 minutes and the sky is moving a lot faster for it. So what is the advantage of having the telescope in LEO? Anyhow, can you get the signal from HST or JWT please? If you can download any data from them, that will be even more great.
I can not reach HST due to its orbital inclination, it never comes within view of central Europe. It should be possible for me to receive the JWST S-band telemetry beacon, but I believe its actual science data is transmitted way up higher and I do not have the hardware for that. The main advantage of space telescopes is the fact that they do not have to deal with the atmosphere. HST can have a 24/7 view of its target if it is aiming "up" or "down" relative to Earth's axis. The sky is also not moving for a space telescope, once you are in space you can lock your orientation relative to the galaxy and not be bound by earth's rotation, so it is actually easier for a space telescope to track an object in the sky than for a terrestrial one. But the Earth does provide an obstruction in some cases, I suppose in case of the HST low-Earth orbit was chosen for ease of access for maintenance with the Space Shuttle, whereas future telescopes (and even many of the current ones) are heading far above LEO
@@dereksgc Ok, but you heard of SOFIA, airborne telescopes? It can be anywhere, easier to maintain, out of most troposphere and I don’t think HST has much better advantage over it, other than HST being much more expensive.
@@dereksgc I think you know some science better than me, so let me ask you this. Do you remember John Glenn, the American hero astronaut? He claimed to have orbited the earth 3 times, meaning at the speed of 28,000 km/h around the Earth and then reentering to the earth that cooks the spacecraft with 3000 F heat. Take a look at his Friendship 7 craft in the Washington's Air and Space Museum. Do you think it went through earth reentry at 3000 F but its paints are intact? BTW, paint melts around 200-300 F.
@@dereksgc Compare Friendship 7, other Mercury, Gemini crafts with the real reentry capsules such as Soyuz and Shenzhoi. Even the bare aluminum Apollo and blow torched to look like it went through reentry. Bare aluminum melts at 1200 F.
@@sbkarajan SOFIA and similar telescopes still operate inside the atmosphere, after all both planes and balloons rely on atmospheric pressure to stay aloft. Space telescopes are going to be a lot more consistent and capable. Hubble is also extremely old and outdated by any metric, by the time SOFIA was flying the technology has improved a lot, and you can see that with JWST now. So yes, you can match the HST today for a fraction of the cost, but it was the innovation and experience gained from HST and others that will lead to more advanced and capable space instruments in the future. If you think SOFIA was as capable as Hubble, which arguably it was in some ways, if it was positioned in LEO it would have been even more capable. About the space capsule, you need to consider the fact that basically every orbital reentry vehicle is equipped with a heat shield on the bottom side. You are correct in your statement that the materials used would melt at those temperatures; it is the job of the heat shield to make sure they never reach them. The heat shield is either ablative and slowly burns away during reentry (in a controlled manner) which is how it takes away the heat energy, or it is just made out of a very durable material that takes the heat. As the heat shield is a blunt surface exposed to the airflow, it forms a "cone" of plasma around the capsule where the high temperature is concentrated, while the trailing surfaces stay relatively cold. If something was to go wrong with the control of the capsule and wrong surfaces (like the painted ones) were exposed to the superheated plasma on the front, you would then be looking at disintegration. There have unfortunately been cases of spacecraft burning up during reentry due to a problem with the heat shield, such as space shuttle Colombia.
gk-2a lrit is honestly kinda boring. its only a single channel IR full disk and some supplementary downlinked forecasts/wind data of the korean region.
@@LunaWuna What about the Fengyun satellites? Or the Elektro-L satellites? And GK-2A LRIT might only be a single IR channel, but because it's transmitted every 10 minutes it allows for some nice animations. It is also very strong, doable without a dish in some cases.
I have a 1m dish antenna (no offset) that I found in a dumpster in Czechia and I want to try to receive Elektro L3 with it, but it has very short amount of space between the boom (idk that thing that holds the feed) and the antenna itself. I think I'll try to make an extension from some sort of mesh (to make it 1.2-1.4m diameter), but I don't think I can fit a helical feed inside. Do you think the bi-quad would work fine with that? Or is there something else I can do?
You can try a biquad but that will have small loss due to wrong polarization. You can try to use helix with narrow spacing and only 3-4 turns, that will be even better suited for prime focus dish
@@dereksgc do you think that that low number of turns will be sufficient? 3 years ago I was using 7 turns on my offset antenna for HRPT, but got little to no signal... I blamed it on the low quality LNA and moved on to other projects,now I'm slowly getting back to satellite reception
Re: Himawari and JCSAT-2B, a bit of searching shows it uses a DVB-S2 receiver on C band using something called "KenCast Fazzt" software, so it's sending IP packets.
Also thanks for covering options from the whole globe, not just Europe & hi from Australia!
*_"If you are at like more or less Z degrees inclination which means directly above the equator your orbital period will more or less match the rotational period of the earth meaning that with respect to the ground the satellite is is basically standing in the same spot 24/7"_*
Arthur C. Clarke got that *_RIGHT In 1945!!!_*
Back in the mid 1970's my neighbor and I built a system to receive *_SMS GOES 2!_*
I always find these videos just as I'm about to start receiving the sats theyre talking about! Exactly the info I was looking for, thanks as always!
US East coast here, thanks for all the details! Look forward to receiving GOES 16 & 18.
Thank you for a very informative video. I am an old man but new to this hobby and your videos have been quite informative. Thank you very much for sharing.
I started working on the 1.7 ghz hrpt, and your videos helped me a lot. thanks from Greece.
great video as always !!
Thank you, this was a very informative and interesting video
Nice overview about whats possible. Thank you and stay dry ( a lot of rain here to for the past 6 weeks) 😀
Great video! Do you think Elektro L2 transmits LRIT or HRIT? Im in the UK so don't think I will get L3 here as looks like I am right on the edge of coverage. Cheers!
No, unfortunately there seem to be issues with this satellite that among other things prevent it from transmitting LRIT and HRIT in the 1.7 GHz band. Images can be received in the X-band at 7500 MHz but the setup for that is a lot more complicated and would require a very large dish antenna in the UK
@@dereksgc Thanks for the reply! Much appreciated! So there are no GEO weather sats I can decode from the UK do you think? BTW, you have such great content and you appear to have extensive knowledge of this topic, thanks for sharing your knowledge. Matt
@@TechMindsOfficial i know some people in the UK who have managed to receive GOES-16 HRIT, but that is the very edge of its coverage
I have a 1m dish antenna (no offset) that I found in a dumpster in Czechia and I want to try to receive Elektro L3 with it, but it has very short amount of space between the boom (idk that thing that holds the feed) and the antenna itself. I think I'll try to make an extension from some sort of mesh (to make it 1.2-1.4m diameter), but I don't think I can fit a helical feed inside. Do you think the double cross would work fine with that? Or is there something else I can do?
This really helped me make sense of all the different guides out there on all the different satellites and transmissions. Thanks for all the detail.
Just what I needed.... Thank you brother... Video much appreciated...🙏
Great Video
Always very informative
Please keep them Coming
73
John
ZS6JON
As usual another good video. Let me acquire a 6 feet dish then i will try insats.
i'm from India and i too am keen in downlinking INSAT signals. how did you modify the LNB for 4.7GHz, most LNBs i find seem to go only upto 4.2GHz.
liked before watching :-)
Very good video, seems to cover it all. I think you missed out CMAcast - China’s equivalent of Himawaricast. But that’s encrypted anyway.
Elektro L3/4 seems to be the best option really, if it wasn’t for the over exposed images.
As for GOES 15, I assume it will stop short of GOES 13. Otherwise they have to move GOES 13 out of the way if GOES 15 takes its position.
13 and 15 could share the same spot (or near enough to not interfere with each other), but it is also possible 13 will just be retired because its imager has degraded
Great video!
ok so how does european meteosat get there information down to earth,because that is what i am missing in your story. And i know there is a eumeteocast service on 10 East i believe, you can get some hardware and a software license key and decode that information.
They use dishes in excess of 10m diameter. Meteosat-11 and earlier use 1.7 GHz but at very little power, Met-12 will use 26 GHz. Eumetcast is a solution but requires a costly receiver and much more involved hardware setup
Thank you for this video; I'm just starting with SDR stuff and receiving NOAA APT. I'm from India and have a C band LNB and a 6-foot dish. I am interested in INSAT 3D. If you could share more information(How I can connect C band LNB with RTL SDR dongle), that would be very helpful.
I have a video on connecting ku-band LNBs to an SDR, C-band is the same thing, just doesn't use the multiple LO. Also have videos on the bias tees I used to power them. Not sure if RTL-SDR is enough for insat imager, but it should work for the infrared sounder downlinks if you actually can get it strong enough.
I am doing the same stuff and I am also from india.
I think we should join forces😂
@@aakashprasad114 i think the same lmao
Can you get any signal from Hubble telescope of James Webb telescope?
What I am curious is, HST, the orbital period is like 90 minutes.
For the earth bound telescopes, we have about 12 hour night sky.
For HST, it's only 45 minutes and the sky is moving a lot faster for it.
So what is the advantage of having the telescope in LEO?
Anyhow, can you get the signal from HST or JWT please?
If you can download any data from them, that will be even more great.
I can not reach HST due to its orbital inclination, it never comes within view of central Europe. It should be possible for me to receive the JWST S-band telemetry beacon, but I believe its actual science data is transmitted way up higher and I do not have the hardware for that.
The main advantage of space telescopes is the fact that they do not have to deal with the atmosphere. HST can have a 24/7 view of its target if it is aiming "up" or "down" relative to Earth's axis. The sky is also not moving for a space telescope, once you are in space you can lock your orientation relative to the galaxy and not be bound by earth's rotation, so it is actually easier for a space telescope to track an object in the sky than for a terrestrial one. But the Earth does provide an obstruction in some cases, I suppose in case of the HST low-Earth orbit was chosen for ease of access for maintenance with the Space Shuttle, whereas future telescopes (and even many of the current ones) are heading far above LEO
@@dereksgc Ok, but you heard of SOFIA, airborne telescopes?
It can be anywhere, easier to maintain, out of most troposphere and I don’t think HST has much better advantage over it, other than HST being much more expensive.
@@dereksgc I think you know some science better than me, so let me ask you this.
Do you remember John Glenn, the American hero astronaut?
He claimed to have orbited the earth 3 times, meaning at the speed of 28,000 km/h around the Earth and then reentering to the earth that cooks the spacecraft with 3000 F heat.
Take a look at his Friendship 7 craft in the Washington's Air and Space Museum.
Do you think it went through earth reentry at 3000 F but its paints are intact?
BTW, paint melts around 200-300 F.
@@dereksgc Compare Friendship 7, other Mercury, Gemini crafts with the real reentry capsules such as Soyuz and Shenzhoi.
Even the bare aluminum Apollo and blow torched to look like it went through reentry.
Bare aluminum melts at 1200 F.
@@sbkarajan SOFIA and similar telescopes still operate inside the atmosphere, after all both planes and balloons rely on atmospheric pressure to stay aloft. Space telescopes are going to be a lot more consistent and capable. Hubble is also extremely old and outdated by any metric, by the time SOFIA was flying the technology has improved a lot, and you can see that with JWST now. So yes, you can match the HST today for a fraction of the cost, but it was the innovation and experience gained from HST and others that will lead to more advanced and capable space instruments in the future. If you think SOFIA was as capable as Hubble, which arguably it was in some ways, if it was positioned in LEO it would have been even more capable.
About the space capsule, you need to consider the fact that basically every orbital reentry vehicle is equipped with a heat shield on the bottom side. You are correct in your statement that the materials used would melt at those temperatures; it is the job of the heat shield to make sure they never reach them. The heat shield is either ablative and slowly burns away during reentry (in a controlled manner) which is how it takes away the heat energy, or it is just made out of a very durable material that takes the heat. As the heat shield is a blunt surface exposed to the airflow, it forms a "cone" of plasma around the capsule where the high temperature is concentrated, while the trailing surfaces stay relatively cold. If something was to go wrong with the control of the capsule and wrong surfaces (like the painted ones) were exposed to the superheated plasma on the front, you would then be looking at disintegration. There have unfortunately been cases of spacecraft burning up during reentry due to a problem with the heat shield, such as space shuttle Colombia.
gk-2a lrit is honestly kinda boring. its only a single channel IR full disk and some supplementary downlinked forecasts/wind data of the korean region.
sadly its pretty much all i can pick up from my location in australia
You can try GK-2A HRIT.
@@eswnl1 no I can not, I have horrible line of sight
@@LunaWuna What about the Fengyun satellites? Or the Elektro-L satellites? And GK-2A LRIT might only be a single IR channel, but because it's transmitted every 10 minutes it allows for some nice animations. It is also very strong, doable without a dish in some cases.
I have a 1m dish antenna (no offset) that I found in a dumpster in Czechia and I want to try to receive Elektro L3 with it, but it has very short amount of space between the boom (idk that thing that holds the feed) and the antenna itself. I think I'll try to make an extension from some sort of mesh (to make it 1.2-1.4m diameter), but I don't think I can fit a helical feed inside. Do you think the bi-quad would work fine with that? Or is there something else I can do?
You can try a biquad but that will have small loss due to wrong polarization. You can try to use helix with narrow spacing and only 3-4 turns, that will be even better suited for prime focus dish
@@dereksgc do you think that that low number of turns will be sufficient? 3 years ago I was using 7 turns on my offset antenna for HRPT, but got little to no signal... I blamed it on the low quality LNA and moved on to other projects,now I'm slowly getting back to satellite reception