I just wondered, as geosynchronous ones still seem to be being launched, and yet direct sat broadcasting does seem to be waning, what are they all actually doing? Is it just that old ones will not work with modern broadcast systems or are clapped out, or is there a growth in DBS to third world areas now?
Brian
I just wondered, as geosynchronous ones still seem to be being launched, and >yet direct sat broadcasting does seem to be waning, what are they all >actually doing? Is it just that old ones will not work with modern broadcast >systems or are clapped out, or is there a growth in DBS to third world areas >now?
Brian
I just wondered, as geosynchronous ones still seem to be being launched, and yet direct sat broadcasting does seem to be waning, what are they all actually doing? Is it just that old ones will not work with modern broadcast systems or are clapped out, or is there a growth in DBS to third world areas now?
Brian
--
--:
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
On Monday, 3 October 2022 at 09:51:04 UTC+1, Brian Gaff wrote:
I just wondered, as geosynchronous ones still seem to be being launched, and >> yet direct sat broadcasting does seem to be waning, what are they all
actually doing? Is it just that old ones will not work with modern broadcast >> systems or are clapped out, or is there a growth in DBS to third world areas >> now?
Brian
--
--:
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
Seven to ten years is fairly typical.
DBS satellites are fairly dumb. Each transponder receives a signal on ~14GHz and rebroadcasts it on ~10GHz.
Each transponder channel is 30Mhz wide and by alternating the polarity can be 15MHz apart.
The satellite knows nothing of the signal structure (analogue, D2-MAC, DVB-S, DVB-S2 etc.) nor encryption [if any], so they do not become morally redundant.
I just wondered, as geosynchronous ones still seem to be being launched,
and yet direct sat broadcasting does seem to be waning, what are they
all actually doing? Is it just that old ones will not work with modern broadcast systems or are clapped out, or is there a growth in DBS to
third world areas now?
Brian
I just wondered, as geosynchronous ones still seem to be being launched, and yet direct sat broadcasting does seem to be waning, what are they all actually doing?
On Monday, 3 October 2022 at 09:51:04 UTC+1, Brian Gaff wrote:
I just wondered, as geosynchronous ones still seem to be being launched, and >> yet direct sat broadcasting does seem to be waning, what are they all
actually doing? Is it just that old ones will not work with modern broadcast >> systems or are clapped out, or is there a growth in DBS to third world areas >> now?
Brian
--
--:
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
Seven to ten years is fairly typical.
DBS satellites are fairly dumb. Each transponder receives a signal on ~14GHz and rebroadcasts it on ~10GHz.
Each transponder channel is 30Mhz wide and by alternating the polarity can be 15MHz apart.
The satellite knows nothing of the signal structure (analogue, D2-MAC, DVB-S, DVB-S2 etc.) nor encryption [if any], so they do not become morally redundant.
I just wondered, as geosynchronous ones still seem to be being
launched, and yet direct sat broadcasting does seem to be waning,
what are they all actually doing? Is it just that old ones will not
work with modern broadcast systems or are clapped out, or is there a
growth in DBS to third world areas now?
Brian
The satellite knows nothing of the signal structure (analogue, D2-MAC, DVB-S, DVB-S2 etc.) nor encryption [if any], so they do not become morally redundant.I perpetrate so many typos that I truly comment only to say I spent a shameful number of seconds wondering if that was a meaning of 'morally'
which had previously escaped me :(
On Monday, 3 October 2022 at 15:23:22 UTC+1, Robin wrote:
I perpetrate so many typos that I truly comment only to say I spent a
The satellite knows nothing of the signal structure (analogue, D2-MAC, DVB-S, DVB-S2 etc.) nor encryption [if any], so they do not become morally redundant.
shameful number of seconds wondering if that was a meaning of 'morally'
which had previously escaped me :(
I can't think what's going on here.
On Monday, 3 October 2022 at 09:51:04 UTC+1, Brian Gaff wrote:
I just wondered, as geosynchronous ones still seem to be being launched,
and
yet direct sat broadcasting does seem to be waning, what are they all
actually doing? Is it just that old ones will not work with modern
broadcast
systems or are clapped out, or is there a growth in DBS to third world
areas
now?
Brian
--
--:
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
Seven to ten years is fairly typical.
DBS satellites are fairly dumb. Each transponder receives a signal on
~14GHz and rebroadcasts it on ~10GHz.
Each transponder channel is 30Mhz wide and by alternating the polarity can
be 15MHz apart.
The satellite knows nothing of the signal structure (analogue, D2-MAC,
DVB-S, DVB-S2 etc.) nor encryption [if any], so they do not become morally redundant.
On Mon, 3 Oct 2022 09:51:00 +0100, "Brian Gaff" <brian1gaff@gmail.com>
wrote:
I just wondered, as geosynchronous ones still seem to be being launched, >>and
yet direct sat broadcasting does seem to be waning, what are they all >>actually doing? Is it just that old ones will not work with modern >>broadcast
systems or are clapped out, or is there a growth in DBS to third world >>areas
now?
Brian
DBS are designed to last 10 years.
--
Martin in Zuid Holland
On Monday, 3 October 2022 at 15:23:22 UTC+1, Robin wrote:
I perpetrate so many typos that I truly comment only to say I spent a
The satellite knows nothing of the signal structure (analogue, D2-MAC,
DVB-S, DVB-S2 etc.) nor encryption [if any], so they do not become
morally redundant.
shameful number of seconds wondering if that was a meaning of 'morally'
which had previously escaped me :(
I can't think what's going on here.
Bill
On 03/10/2022 19:48, wrightsaerials@aol.com wrote:
On Monday, 3 October 2022 at 15:23:22 UTC+1, Robin wrote:
I perpetrate so many typos that I truly comment only to say I spent a
The satellite knows nothing of the signal structure (analogue, D2-MAC, >>>> DVB-S, DVB-S2 etc.) nor encryption [if any], so they do not become
morally redundant.
shameful number of seconds wondering if that was a meaning of 'morally'
which had previously escaped me :(
I can't think what's going on here.
morally vs modally
--
Robin
reply-to address is (intended to be) valid
On Mon, 03 Oct 2022 09:51:00 +0100, Brian Gaff wrote:
I just wondered, as geosynchronous ones still seem to be being launched,
and yet direct sat broadcasting does seem to be waning, what are they
all actually doing? Is it just that old ones will not work with modern
broadcast systems or are clapped out, or is there a growth in DBS to
third world areas now?
Brian
The moon has been there for quite a while.
Brian Gaff wrote:
I just wondered, as geosynchronous ones still seem to be being launched,
and
yet direct sat broadcasting does seem to be waning, what are they all
actually doing?
They only contain enough propellant to perform "station keeping" for a certain number of years, after that they're on borrowed time and can't actually start geostationary
On Mon, 3 Oct 2022 09:51:00 +0100
"Brian Gaff" <brian1gaff@gmail.com> wrote:
I just wondered, as geosynchronous ones still seem to be being
launched, and yet direct sat broadcasting does seem to be waning,
what are they all actually doing? Is it just that old ones will not
work with modern broadcast systems or are clapped out, or is there a
growth in DBS to third world areas now?
Brian
It's nice to see a post using the word 'satellite' correctly, instead
of having it refer to a satellite dish, which is an all-too common use.
Thank you Brian.
Don't forget that china and Russia use them for target practice.
--
Davey.
On 04/10/2022 12:06, Brian Gaff wrote:
No, mortally perhaps. You can after all be mortally wounded, but can
you use
that term to a non living piece of space hardware.
Incidentally, what became of Marco Polo and its Squarial receivers?
Brian
Marco Polo 1 and Marco Polo 2 had 5 transponders each so could support broadcasting of up to 10 channels (assuming no redundancy)
They were launched as part of the Ill fated British Sky Broadcasting. I
don't recall what satellite orbital slot it went to.
At launch there was 5 TV channels in D2 Mac.
Sky Television lauched to Astra 19.2E. Later, it merged with BSB to form BSkyB.
The two Marcopolo satellites were sold off, one went to NSAB who
operated 5.0 East and one of the Marcopolos became Sirius 1.
The othetr Marcopolo was sold to Telenor who operated 1.0 West. That Marcopolo became Thor 1.
Both Marcopolos are now end of lifed and in a graveyard orbit somewhere.
No, mortally perhaps. You can after all be mortally wounded, but can you use that term to a non living piece of space hardware.
Incidentally, what became of Marco Polo and its Squarial receivers?
Brian
I know at least one of them has a Ham radio repeater on it, working at a
high frequency as well, whether this utilised the same hardware or not I do not know.
I just wondered, as geosynchronous ones still seem to be being launched, and yet direct sat broadcasting does seem to be waning, what are they all actually doing? Is it just that old ones will not work with modern broadcast systems or are clapped out, or is there a growth in DBS to third world areas now?
I know at least one of them has a Ham radio repeater on it, working at a
high frequency as well, whether this utilised the same hardware or not I do not know.
Well some are up there still being used well after that time, if you
look on some of the lists you can download. Not sure why they would
want one in an inclined orbit, as the whole point was that they seem
to be static in the sky. It would be silly to have a sat that moved
in little circles as viewed from earth, surely?
Brian
On Monday, 3 October 2022 at 15:23:22 UTC+1, Robin wrote:
I can't think what's going on here.The satellite knows nothing of the signal structure (analogue, D2-MAC, DVB-S, DVB-S2 etc.) nor encryption [if any], so they do not become morally redundant.I perpetrate so many typos that I truly comment only to say I spent a shameful number of seconds wondering if that was a meaning of 'morally' which had previously escaped me :(
Bill
On Monday, 3 October 2022 at 19:48:05 UTC+1, wrights...@aol.com wrote:
On Monday, 3 October 2022 at 15:23:22 UTC+1, Robin wrote:
I never knew that!I can't think what's going on here.The satellite knows nothing of the signal structure (analogue, D2-MAC, DVB-S, DVB-S2 etc.) nor encryption [if any], so they do not become morally redundant.I perpetrate so many typos that I truly comment only to say I spent a shameful number of seconds wondering if that was a meaning of 'morally' which had previously escaped me :(
BillAn item which is worn out or served its purpose is physically redundant - e.g. old car, empty non-returnable bottle.
An item which was made for a purpose no longer utilised is morally redundant - e.g. videocrypt decoder, analogue mobile phone, VHF TV aerial - even if it would still function.
On Friday, 7 October 2022 at 15:30:49 UTC+1, R. Mark Clayton wrote:
An item which is worn out or served its purpose is physically redundant - e.g. old car, empty non-returnable bottle.
An item which was made for a purpose no longer utilised is morally redundant - e.g. videocrypt decoder, analogue mobile phone, VHF TV aerial - even if it would still function.
I never knew that!
On 04/10/2022 12:02, Brian Gaff wrote:
I know at least one of them has a Ham radio repeater on it, working
at a high frequency as well, whether this utilised the same
hardware or not I do not know.
As far as I am aware, the OSCAR satellites are not geosynchronous and
not HF, the original one was 144 MHz but later ones were on various
bands in VHF, UHF and higher (I think).
On 07/10/2022 21:24, wrights...@aol.com wrote:
On Friday, 7 October 2022 at 15:30:49 UTC+1, R. Mark Clayton wrote:
An item which is worn out or served its purpose is physically redundant - e.g. old car, empty non-returnable bottle.
An item which was made for a purpose no longer utilised is morally redundant - e.g. videocrypt decoder, analogue mobile phone, VHF TV aerial - even if it would still function.
I never knew that!I also have never heard the word 'morally' used like that, and a brief online dictionary search didn't find that meaning either. Even if the
word *is* actually used like that, which I rather doubt, for that
intended meaning it would still be better to use a closer fitting word
like 'functionally' or 'effectually'.
--
Fake news kills!
I may be contacted via the contact address given on my website: www.macfh.co.uk
On Friday, 7 October 2022 at 21:44:51 UTC+1, Java Jive wrote:to operate, some after little more than ten years.
On 07/10/2022 21:24, wrights...@aol.com wrote:
On Friday, 7 October 2022 at 15:30:49 UTC+1, R. Mark Clayton wrote:
An item which is worn out or served its purpose is physically redundant - e.g. old car, empty non-returnable bottle.
An item which was made for a purpose no longer utilised is morally redundant - e.g. videocrypt decoder, analogue mobile phone, VHF TV aerial - even if it would still function.
I never knew that!
I also have never heard the word 'morally' used like that, and a brief
online dictionary search didn't find that meaning either. Even if the
word *is* actually used like that, which I rather doubt, for that
intended meaning it would still be better to use a closer fitting word
like 'functionally' or 'effectually'.
Fake news kills!
I may be contacted via the contact address given on my website:
www.macfh.co.uk
I came across it some years ago in an economic text about why capital goods were replaced. Perhaps a better example would be steam trains. Only one built in over fifty years in the UK, and nearly all previous examples scrapped as not worth continuing
Brian Gaff wrote:
Well some are up there still being used well after that time, if youSnip
look on some of the lists you can download. Not sure why they would
want one in an inclined orbit, as the whole point was that they seem
to be static in the sky. It would be silly to have a sat that moved
in little circles as viewed from earth, surely?
Brian
I've transmitted to an old Astra satellite that was in an inclined
orbit. This was for SNG (Satellite News Gathering). We had the ability
to automatically track the figure of eight movement of the satellite.
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