Bezos had more money than god when Musk predicted that "Unicorns will dance in the flame trench if Bezos has a man-rated rocket within 5 years". That date passed quietly last year, and NG is still more than a year away.
Short lifespan is a feature, not a bug. It means upgrading capabilities happens quickly in a routine manner. The SV way is MVP and then iterate like craazy.
The constellation business will become a race. SpaceX has a much more capable launcher (either now, or in 4 years). This allows them to push a more capable constellation, with lower costs.OneWeb and Amazon can't compete with that, except for making sure they can capitalize on a potential mistake by SpaceX.
Well Amazon/Blue Origin is getting a late start. We have Alexa's Cubes, Fire TV, etc. Alexa's search engine is very poor compared to Google. If Starlink uses Google, it will be no contest unless Amazon Alexa greatly improves.
Better internet security is also big plus with these constellations. Currently data between AWS servers and customers goes via internet that takes which ever route internet switches decide. Not great way to guarantee data security. With constellation all data between servers and big customers can go via secure satellite constellation, with bonus of low latency.This especially important with government agencies, big corporates and financial institutions.
...That said, I also wonder how this is going to impact the desire of commsat companies to launch on Blue Origin in the future. Now one of the big things going for them relative to SpaceX (that launching on them wasn't funding a competitor) is no longer true. ~Jon
Quote from: Ultrafamicom on 04/05/2019 11:28 amQuote from: meekGee on 04/05/2019 03:15 amQuote from: ncb1397 on 04/04/2019 11:23 pmQuote from: meekGee on 04/04/2019 11:20 pmAny of these constellations will be requiring a constant launch cadence. 1/week or more.Really? 250 kg satellites, 100,000 kg per launch, 400 satellites per launch. 10 launches for deployment. They get replaced every 2.5 months?edit: even 500 kg satellites, 45,000 kg per launch, 90 satellites per launch, 3236 satellites would be 36 launches or replacing the constellation nearly twice a year at 1 per week.Maybe I'm behind the times but I remember 45,000 kg per launch, so yeah, 90 at most. Less the launch mount, which is not negligible. You're also constrained by orbital planes, so OOM, you're delivering one orbital plane per launch, give or take.For smaller constellations (like the proposed Amazon one), 20-30 planes?But for Starlink, 3x as many? (I don't have the official count)If lifetime is 3 years, you have to replace 33% of the constellation every year, after a 3-year build-up.Or, you try to accelerate the build-up by launching even more often.That's where launch capacity and launch cost will really matter.Bezos is doing all he can to make sure that if SpaceX slips, he'll be ready to take advantage of it. But if SpaceX doesn't slip, I think he's going to have a really hard time keeping up.No. I think it had been mentioned many times here, that because of precession effect caused by equatorial bulge, satellite can drift between different planes easily. Even iridium doesn't launch one plane a time.Iridium didn't have much choice, not enough satellites per plane. Changing planes using precession takes time, and these mega-constellation satellites don't have much lifetime to waste.I don't know for sure, but it's a safe guess that the preferred method will still be one plane per launch, and any orbital spares similarly in-plane.The down side will be that you don't get partial coverage when you're partially deployed, so I can see perhaps a compromise where two half-planes are deployed with one launch. Maybe. Unless the number of satellites is large enough that it takes two launches to get one plane populated anyway, and then the problem is solved.
Quote from: meekGee on 04/05/2019 03:15 amQuote from: ncb1397 on 04/04/2019 11:23 pmQuote from: meekGee on 04/04/2019 11:20 pmAny of these constellations will be requiring a constant launch cadence. 1/week or more.Really? 250 kg satellites, 100,000 kg per launch, 400 satellites per launch. 10 launches for deployment. They get replaced every 2.5 months?edit: even 500 kg satellites, 45,000 kg per launch, 90 satellites per launch, 3236 satellites would be 36 launches or replacing the constellation nearly twice a year at 1 per week.Maybe I'm behind the times but I remember 45,000 kg per launch, so yeah, 90 at most. Less the launch mount, which is not negligible. You're also constrained by orbital planes, so OOM, you're delivering one orbital plane per launch, give or take.For smaller constellations (like the proposed Amazon one), 20-30 planes?But for Starlink, 3x as many? (I don't have the official count)If lifetime is 3 years, you have to replace 33% of the constellation every year, after a 3-year build-up.Or, you try to accelerate the build-up by launching even more often.That's where launch capacity and launch cost will really matter.Bezos is doing all he can to make sure that if SpaceX slips, he'll be ready to take advantage of it. But if SpaceX doesn't slip, I think he's going to have a really hard time keeping up.No. I think it had been mentioned many times here, that because of precession effect caused by equatorial bulge, satellite can drift between different planes easily. Even iridium doesn't launch one plane a time.
Quote from: ncb1397 on 04/04/2019 11:23 pmQuote from: meekGee on 04/04/2019 11:20 pmAny of these constellations will be requiring a constant launch cadence. 1/week or more.Really? 250 kg satellites, 100,000 kg per launch, 400 satellites per launch. 10 launches for deployment. They get replaced every 2.5 months?edit: even 500 kg satellites, 45,000 kg per launch, 90 satellites per launch, 3236 satellites would be 36 launches or replacing the constellation nearly twice a year at 1 per week.Maybe I'm behind the times but I remember 45,000 kg per launch, so yeah, 90 at most. Less the launch mount, which is not negligible. You're also constrained by orbital planes, so OOM, you're delivering one orbital plane per launch, give or take.For smaller constellations (like the proposed Amazon one), 20-30 planes?But for Starlink, 3x as many? (I don't have the official count)If lifetime is 3 years, you have to replace 33% of the constellation every year, after a 3-year build-up.Or, you try to accelerate the build-up by launching even more often.That's where launch capacity and launch cost will really matter.Bezos is doing all he can to make sure that if SpaceX slips, he'll be ready to take advantage of it. But if SpaceX doesn't slip, I think he's going to have a really hard time keeping up.
Quote from: meekGee on 04/04/2019 11:20 pmAny of these constellations will be requiring a constant launch cadence. 1/week or more.Really? 250 kg satellites, 100,000 kg per launch, 400 satellites per launch. 10 launches for deployment. They get replaced every 2.5 months?edit: even 500 kg satellites, 45,000 kg per launch, 90 satellites per launch, 3236 satellites would be 36 launches or replacing the constellation nearly twice a year at 1 per week.
Any of these constellations will be requiring a constant launch cadence. 1/week or more.
Quote from: meekGee on 04/05/2019 02:36 pmQuote from: Ultrafamicom on 04/05/2019 11:28 amQuote from: meekGee on 04/05/2019 03:15 amQuote from: ncb1397 on 04/04/2019 11:23 pmQuote from: meekGee on 04/04/2019 11:20 pmAny of these constellations will be requiring a constant launch cadence. 1/week or more.Really? 250 kg satellites, 100,000 kg per launch, 400 satellites per launch. 10 launches for deployment. They get replaced every 2.5 months?edit: even 500 kg satellites, 45,000 kg per launch, 90 satellites per launch, 3236 satellites would be 36 launches or replacing the constellation nearly twice a year at 1 per week.Maybe I'm behind the times but I remember 45,000 kg per launch, so yeah, 90 at most. Less the launch mount, which is not negligible. You're also constrained by orbital planes, so OOM, you're delivering one orbital plane per launch, give or take.For smaller constellations (like the proposed Amazon one), 20-30 planes?But for Starlink, 3x as many? (I don't have the official count)If lifetime is 3 years, you have to replace 33% of the constellation every year, after a 3-year build-up.Or, you try to accelerate the build-up by launching even more often.That's where launch capacity and launch cost will really matter.Bezos is doing all he can to make sure that if SpaceX slips, he'll be ready to take advantage of it. But if SpaceX doesn't slip, I think he's going to have a really hard time keeping up.No. I think it had been mentioned many times here, that because of precession effect caused by equatorial bulge, satellite can drift between different planes easily. Even iridium doesn't launch one plane a time.Iridium didn't have much choice, not enough satellites per plane. Changing planes using precession takes time, and these mega-constellation satellites don't have much lifetime to waste.I don't know for sure, but it's a safe guess that the preferred method will still be one plane per launch, and any orbital spares similarly in-plane.The down side will be that you don't get partial coverage when you're partially deployed, so I can see perhaps a compromise where two half-planes are deployed with one launch. Maybe. Unless the number of satellites is large enough that it takes two launches to get one plane populated anyway, and then the problem is solved.Mega constellations don't have choice as well, most satellites will be launched to orbits lower than working orbits to avoid creating junk in case of engine malfunction. In any case weeks of orbit raising before operation looks like unavoidable.
Quote from: Ultrafamicom on 04/06/2019 04:17 amQuote from: meekGee on 04/05/2019 02:36 pmQuote from: Ultrafamicom on 04/05/2019 11:28 amQuote from: meekGee on 04/05/2019 03:15 amQuote from: ncb1397 on 04/04/2019 11:23 pmQuote from: meekGee on 04/04/2019 11:20 pmAny of these constellations will be requiring a constant launch cadence. 1/week or more.Really? 250 kg satellites, 100,000 kg per launch, 400 satellites per launch. 10 launches for deployment. They get replaced every 2.5 months?edit: even 500 kg satellites, 45,000 kg per launch, 90 satellites per launch, 3236 satellites would be 36 launches or replacing the constellation nearly twice a year at 1 per week.Maybe I'm behind the times but I remember 45,000 kg per launch, so yeah, 90 at most. Less the launch mount, which is not negligible. You're also constrained by orbital planes, so OOM, you're delivering one orbital plane per launch, give or take.For smaller constellations (like the proposed Amazon one), 20-30 planes?But for Starlink, 3x as many? (I don't have the official count)If lifetime is 3 years, you have to replace 33% of the constellation every year, after a 3-year build-up.Or, you try to accelerate the build-up by launching even more often.That's where launch capacity and launch cost will really matter.Bezos is doing all he can to make sure that if SpaceX slips, he'll be ready to take advantage of it. But if SpaceX doesn't slip, I think he's going to have a really hard time keeping up.No. I think it had been mentioned many times here, that because of precession effect caused by equatorial bulge, satellite can drift between different planes easily. Even iridium doesn't launch one plane a time.Iridium didn't have much choice, not enough satellites per plane. Changing planes using precession takes time, and these mega-constellation satellites don't have much lifetime to waste.I don't know for sure, but it's a safe guess that the preferred method will still be one plane per launch, and any orbital spares similarly in-plane.The down side will be that you don't get partial coverage when you're partially deployed, so I can see perhaps a compromise where two half-planes are deployed with one launch. Maybe. Unless the number of satellites is large enough that it takes two launches to get one plane populated anyway, and then the problem is solved.Mega constellations don't have choice as well, most satellites will be launched to orbits lower than working orbits to avoid creating junk in case of engine malfunction. In any case weeks of orbit raising before operation looks like unavoidable.The final orbits are pretty short lived, so the injection orbits will be pretty close to them IMO
Is there any indication that the Kuiper Constellation has the ambition Starlink has for laser intersatellite links and becoming a new lower latency internet backbone? Or does it seem to be another One Web?
“Project Kuiper is a new initiative to launch a constellation of low Earth orbit satellites that will provide low-latency, high-speed broadband connectivity to unserved and underserved communities around the world,” an Amazon spokesperson said in an emailed statement. “This is a long-term project that envisions serving tens of millions of people who lack basic access to broadband internet. We look forward to partnering on this initiative with companies that share this common vision.”
IMO given Amazon's AWS business this is both expected and almost a foregone conclusion.
Quote from: meekGee on 04/06/2019 09:18 amIMO given Amazon's AWS business this is both expected and almost a foregone conclusion.I don't see why Amazon's AWS should have a preference for a particular infrastructure.
Quote from: Oli on 04/06/2019 10:28 amQuote from: meekGee on 04/06/2019 09:18 amIMO given Amazon's AWS business this is both expected and almost a foregone conclusion.I don't see why Amazon's AWS should have a preference for a particular infrastructure.You don't see why a data center and cloud hosting company would care about a wholly-controlled fast backbone?
Quote from: meekGee on 04/06/2019 10:32 amQuote from: Oli on 04/06/2019 10:28 amQuote from: meekGee on 04/06/2019 09:18 amIMO given Amazon's AWS business this is both expected and almost a foregone conclusion.I don't see why Amazon's AWS should have a preference for a particular infrastructure.You don't see why a data center and cloud hosting company would care about a wholly-controlled fast backbone?Depends. If the margins in the infrastructure business are high, higher than what they can achieve by expanding their existing business, they might enter the market. I don't see why they have to control it.
Once they're in, ISTM that of course they'll want a sat-to-sat backbone.
Yes. On their notional roadmap...