Maybe not 12000 satellites

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Maybe not 12000 satellites

#1

Post by SkyHiker »


This made me feel better. The economics of bringing space internet only to remote rural areas are quite challenging. The article mentions 1000 satellites not 12000 like we read earlier.

https://www.latimes.com/business/la-fi- ... utType=amp

Why anybody would want to live in a city on a planet without breathable atmosphere and liveable temperatures beats me, if that's what it's for.
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Re: Maybe not 12000 satellites

#2

Post by notFritzArgelander »


The question of this service meaning the end of microwave radio astronomy based on Earth is still open though. I can't imagine the good folks at ALMA are happy with this.... The following statement suggests cooperation, but I'm pessimistic.

https://public.nrao.edu/news/nrao-statement-commsats/
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Re: Maybe not 12000 satellites

#3

Post by KingNothing13 »


notFritzArgelander wrote: Sat Jun 29, 2019 4:48 am The question of this service meaning the end of microwave radio astronomy based on Earth is still open though. I can't imagine the good folks at ALMA are happy with this.... The following statement suggests cooperation, but I'm pessimistic.

https://public.nrao.edu/news/nrao-statement-commsats/
Eeep! That's something I had never thought of with this....but I am still in the early stages of hearing about it.
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Re: Maybe not 12000 satellites

#4

Post by helicon »


This seems like a good idea, but the ramifications may be daunting.
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Re: Maybe not 12000 satellites

#5

Post by SkyHiker »


notFritzArgelander wrote: Sat Jun 29, 2019 4:48 am The question of this service meaning the end of microwave radio astronomy based on Earth is still open though. I can't imagine the good folks at ALMA are happy with this.... The following statement suggests cooperation, but I'm pessimistic.

https://public.nrao.edu/news/nrao-statement-commsats/
Then there's OneWeb, Virgin, LeoSat, Heritage and Amazon who want to do the same. Two of these are European, who knows where else similar projects are started.

What I liked about that article is that it has become clear that internet satellites cannot compete in urban areas and so they can only hope to serve 3% to 5% of the population, probably some of the poorest. Looks like a poor business model to me, let's hope it will implode.

Iridium already did a long time ago, a $5B investment was eventually sold for $25M (https://www.forbes.com/2001/11/30/1130t ... 6831512dd8). It is doing well now but drastically scaled back, only for specific markets not really internet for remote rural areas. Well unless you want to call 20 kBps via a sat phone, internet capable, I wonder what the price tag is.
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Re: Maybe not 12000 satellites

#6

Post by Gulf Coast Guy »


notFritzArgelander wrote: Sat Jun 29, 2019 4:48 am The question of this service meaning the end of microwave radio astronomy based on Earth is still open though. I can't imagine the good folks at ALMA are happy with this.... The following statement suggests cooperation, but I'm pessimistic.

https://public.nrao.edu/news/nrao-statement-commsats/
It's all dependant on sincerity and follow thru.
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Re: Maybe not 12000 satellites

#7

Post by notFritzArgelander »


KingNothing13 wrote: Sat Jun 29, 2019 12:49 pm
notFritzArgelander wrote: Sat Jun 29, 2019 4:48 am The question of this service meaning the end of microwave radio astronomy based on Earth is still open though. I can't imagine the good folks at ALMA are happy with this.... The following statement suggests cooperation, but I'm pessimistic.

https://public.nrao.edu/news/nrao-statement-commsats/
Eeep! That's something I had never thought of with this....but I am still in the early stages of hearing about it.
All those microwave channels are interference to a radio telescope.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: Maybe not 12000 satellites

#8

Post by KingNothing13 »


notFritzArgelander wrote: Sat Jun 29, 2019 7:26 pm
KingNothing13 wrote: Sat Jun 29, 2019 12:49 pm
notFritzArgelander wrote: Sat Jun 29, 2019 4:48 am The question of this service meaning the end of microwave radio astronomy based on Earth is still open though. I can't imagine the good folks at ALMA are happy with this.... The following statement suggests cooperation, but I'm pessimistic.

https://public.nrao.edu/news/nrao-statement-commsats/
Eeep! That's something I had never thought of with this....but I am still in the early stages of hearing about it.
All those microwave channels are interference to a radio telescope.
Would they be able to "filter out" their frequency?
-- Brett

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Re: Maybe not 12000 satellites

#9

Post by notFritzArgelander »


KingNothing13 wrote: Sat Jun 29, 2019 7:47 pm
notFritzArgelander wrote: Sat Jun 29, 2019 7:26 pm
KingNothing13 wrote: Sat Jun 29, 2019 12:49 pm

Eeep! That's something I had never thought of with this....but I am still in the early stages of hearing about it.
All those microwave channels are interference to a radio telescope.
Would they be able to "filter out" their frequency?
No. Definitely not. The communications channels use keyed "spread spectrum" modulation schemes that look like broadband noise.

https://en.wikipedia.org/wiki/Spread_spectrum

I don't see a way of mitigating this.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: Maybe not 12000 satellites

#10

Post by JayTee »


It is no longer just LP we have to deal with. We are now experiencing EMP, which takes on a whole new meaning. We are now facing an era of electromagnetic pollution.

Perturbed,
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Re: Maybe not 12000 satellites

#11

Post by Ozypic »


Its funny you cant camp in some national parks and yet you can put up a heap of satellites. Its time we got to vote on planetary decisions... dont we all own the sky ? Or just the ones that can... sigh
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Re: Maybe not 12000 satellites

#12

Post by Gulf Coast Guy »


I wonder how many wrong decisions have been made in the interest of a misdirected honest desire to improve the human condition.

Just because you can doesn't mean you should.
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