The TDRS system can in theory be replaced with a small satellite and purchasing time on commercial com satellites.)
Quote from: pathfinder_01 on 11/22/2013 06:54 pm The TDRS system can in theory be replaced with a small satellite and purchasing time on commercial com satellites.) Really? Do tell! Are dedicated channels on commercial comsats really that cheap?
Quote from: Danderman on 11/22/2013 10:58 pmQuote from: pathfinder_01 on 11/22/2013 06:54 pm The TDRS system can in theory be replaced with a small satellite and purchasing time on commercial com satellites.) Really? Do tell! Are dedicated channels on commercial comsats really that cheap?Ah no, but I do see a differnt kind of model for operations. I can see a station acting to extend the time on Orbit for tourists right not all you get is 3 days on the ISS, what if you could get say a week or two, I think something like that might sell and work.
Quote from: pathfinder_01 on 11/22/2013 11:06 pmAh no, but I do see a differnt kind of model for operations. I can see a station acting to extend the time on Orbit for tourists right not all you get is 3 days on the ISS, what if you could get say a week or two, I think something like that might sell and work. The historical time at the station for tourists has been something like 6 days, with 2 days of free flight time.
Ah no, but I do see a differnt kind of model for operations. I can see a station acting to extend the time on Orbit for tourists right not all you get is 3 days on the ISS, what if you could get say a week or two, I think something like that might sell and work.
Quote from: Danderman on 11/22/2013 11:37 pmQuote from: pathfinder_01 on 11/22/2013 11:06 pmAh no, but I do see a differnt kind of model for operations. I can see a station acting to extend the time on Orbit for tourists right not all you get is 3 days on the ISS, what if you could get say a week or two, I think something like that might sell and work. The historical time at the station for tourists has been something like 6 days, with 2 days of free flight time.Yep, Wikipedia has a nice table: http://en.wikipedia.org/wiki/Space_tourism#List_of_flown_space_tourists
Why do unmanned satellites of varying sizes need MUCH less staff to keep functioning but the station need WAY, WAY more? Yeah it is manned and yes there are special issues to it being manned but there are also lots of things on earth that are man or unmanned and the staffing ratio doesn't explode near as much.
ISS is a vastly more complex spacecraft than anything Bigelow would build. Surely a much simpler system would be much cheaper to operate.
Quote from: billh on 11/26/2013 04:18 pmISS is a vastly more complex spacecraft than anything Bigelow would build. Surely a much simpler system would be much cheaper to operate.What are some examples of this though? E.g. could you do a single ground station for a station with humans onboard?
And yet you still feel its necessary to bring up the "private can do everything NASA does at a fraction of the cost" "argument".
You think people at NASA are not motivated enough to spend their budget on other things than ISS operation?
Actually, I've wondered about using a commercial constellation, aka Iridium, Globalstar or Orbcomm. Russia already uses Iridium for its ground rescue communications.
Quote from: daveklingler on 11/26/2013 07:03 pmActually, I've wondered about using a commercial constellation, aka Iridium, Globalstar or Orbcomm. Russia already uses Iridium for its ground rescue communications. Not nearly enough bandwidth for a space platform that hosts humans, unless they really, really constrain comm to a few bps per function.
Next-gen Iridium constellation will be capable of high-speed Ka-band data channels of up to 8Mbit/s. That's enough for a (compressed) hidef video stream. And it's possible to have multiple channels simultaneously. (And, actually, they just have a new service capable of 64mbps that they recently announced for broadcast purposes... it will be available when the next-gen constellation is up in 2017.) By the time any commercial space hotel is even close to launch, there will be plenty of resources from Iridium.
Quote from: Robotbeat on 11/30/2013 04:56 amNext-gen Iridium constellation will be capable of high-speed Ka-band data channels of up to 8Mbit/s. That's enough for a (compressed) hidef video stream. And it's possible to have multiple channels simultaneously. (And, actually, they just have a new service capable of 64mbps that they recently announced for broadcast purposes... it will be available when the next-gen constellation is up in 2017.) By the time any commercial space hotel is even close to launch, there will be plenty of resources from Iridium.Let us know when Iridium gets that spectrum.
Quote from: Danderman on 11/30/2013 02:20 pmQuote from: Robotbeat on 11/30/2013 04:56 amNext-gen Iridium constellation will be capable of high-speed Ka-band data channels of up to 8Mbit/s. That's enough for a (compressed) hidef video stream. And it's possible to have multiple channels simultaneously. (And, actually, they just have a new service capable of 64mbps that they recently announced for broadcast purposes... it will be available when the next-gen constellation is up in 2017.) By the time any commercial space hotel is even close to launch, there will be plenty of resources from Iridium.Let us know when Iridium gets that spectrum.Who says they need extra spectrum for that bandwidth? From what I understand, it's just diverting resources that would otherwise service other customers. Obviously, you're going to pay a premium.Iridium is an established company, with satellites being built right now. I'm pretty sure the onus is on those saying they won't have that capability (such as yourself).
Quote from: Robotbeat on 12/02/2013 12:17 amQuote from: Danderman on 11/30/2013 02:20 pmQuote from: Robotbeat on 11/30/2013 04:56 amNext-gen Iridium constellation will be capable of high-speed Ka-band data channels of up to 8Mbit/s. That's enough for a (compressed) hidef video stream. And it's possible to have multiple channels simultaneously. (And, actually, they just have a new service capable of 64mbps that they recently announced for broadcast purposes... it will be available when the next-gen constellation is up in 2017.) By the time any commercial space hotel is even close to launch, there will be plenty of resources from Iridium.Let us know when Iridium gets that spectrum.Who says they need extra spectrum for that bandwidth? From what I understand, it's just diverting resources that would otherwise service other customers. Obviously, you're going to pay a premium.Iridium is an established company, with satellites being built right now. I'm pretty sure the onus is on those saying they won't have that capability (such as yourself).Iridium has a tiny amount of spectrum now to support its current user base at something like 2400 bps per connection. Switching to a different band at a higher bandwidth would be very difficult and costly.Iridium does have second generation satellites being built to support its current user base at the lower bandwidth.AFAIK, there are no solid plans to provide high bandwidth connectivity from LEO platforms.
]You should do research before making such assertions.http://www.iridium.com/about/IridiumNEXT/Technology.aspxYou can already get 132kbps connections using the current, already-existing Iridium constellation. The next-gen network will be capable of 64mbps connections.
Just stating some assumptions are low and other are high without qualifying why and what a better estimate is, is meaningless.
I've increased cost of Other services as response to Danderman, from 10 to 15 mill. per mission.
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