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Satellite Launches and Retirements
Eutelsat Hot Bird 13F & 13G
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<blockquote data-quote="Fisty McB" data-source="post: 1159803" data-attributes="member: 389824"><p>Just a few pointers...</p><p></p><p>* The reason some are suggesting that these Vivacom tests at 13E are using a "Superbeam" is that such a beam was in Eutelsat's publicity for both the HB 13F & 13G birds prior to their launch. It was a worry about a year ago for some on this forum that certain broadcasters at 13 East would transfer to a new "Superbeam" beam on the new birds that concentrated predominantly on Europe with little overspill at the expense of the Middle East & Central Asia, but this didn't come to pass with all transferred services remaining on a "Widebeam" on both satellites very similar to the satellites it replaced. The only people whom can confidently say that no such "Superbeam" beam exists is either Eutelsat or Vivacom themselves, but for whatever reason satellite operators have became a bit more reluctant in publishing footprint maps prior to new birds coming into service these days.</p><p></p><p>* It's also possible that certain birds may have a beam or beams that are otherwise not made public until it is needed - this can't be more obvious than the spot beam on Astra 1N that seemed to magically disappear in all SES publicity once it finished its temporary mission at 28 East and moved to 19 East, claiming it has only one pan-European beam! So it is possible that at least one of the two new Hot Bird satellites have more than just a traditional Widebeam footprint on them. (Incidently that spot beam on Astra 1N looked like it was intended for coverage of the Iberian pennisula as it had a side contour on its south-east to reach down to the Canaries, but it was seemingly never put into full service at 19 East?).</p><p></p><p>* It's also very possible that they could be doing these tests on the old HB 13E satellite by shifting its Widebeam footprint a bit to the east to centre over South-Eastern Europe, but if this were to be the case we should be having reception reports from the likes of the Middle East & Iran where there should be a corresponding improvement in signal strength for the corresponding transponders compared to what was first reported when reception in the UK was possible - none has been confirmed, at least here on Sats UK. Also, it's a struggle to make sense of using a satellite that's now 18 years old to be brought out of its sleep to launch a DTH service - it can't be too long before it starts to have large enough inclination swings to render it unsuitable for DTH use.</p><p></p><p>* The transmission configuration of 8PSK modulation with an FEC of 5/6 will hit fringe reception as the minimum C/N ratio for this configuration is 9.4db - probably a good reason why those of us on the western fringes of Europe are (now) getting nothing from these transmissions with modest (<1 metre) sized dishes. <em>C'est la vie.</em> I wonder what size of dishes Vivacom subscribers in Bulgaria are using for the service currently at 45 East?</p><p></p><p>My €0.02 assumption? These Vivacom tests are using an otherwise currently unpublised beam (possibly the "Superbeam") on Hotbird 13F or 13G, until evidence proves otherwise.</p></blockquote><p></p>
[QUOTE="Fisty McB, post: 1159803, member: 389824"] Just a few pointers... * The reason some are suggesting that these Vivacom tests at 13E are using a "Superbeam" is that such a beam was in Eutelsat's publicity for both the HB 13F & 13G birds prior to their launch. It was a worry about a year ago for some on this forum that certain broadcasters at 13 East would transfer to a new "Superbeam" beam on the new birds that concentrated predominantly on Europe with little overspill at the expense of the Middle East & Central Asia, but this didn't come to pass with all transferred services remaining on a "Widebeam" on both satellites very similar to the satellites it replaced. The only people whom can confidently say that no such "Superbeam" beam exists is either Eutelsat or Vivacom themselves, but for whatever reason satellite operators have became a bit more reluctant in publishing footprint maps prior to new birds coming into service these days. * It's also possible that certain birds may have a beam or beams that are otherwise not made public until it is needed - this can't be more obvious than the spot beam on Astra 1N that seemed to magically disappear in all SES publicity once it finished its temporary mission at 28 East and moved to 19 East, claiming it has only one pan-European beam! So it is possible that at least one of the two new Hot Bird satellites have more than just a traditional Widebeam footprint on them. (Incidently that spot beam on Astra 1N looked like it was intended for coverage of the Iberian pennisula as it had a side contour on its south-east to reach down to the Canaries, but it was seemingly never put into full service at 19 East?). * It's also very possible that they could be doing these tests on the old HB 13E satellite by shifting its Widebeam footprint a bit to the east to centre over South-Eastern Europe, but if this were to be the case we should be having reception reports from the likes of the Middle East & Iran where there should be a corresponding improvement in signal strength for the corresponding transponders compared to what was first reported when reception in the UK was possible - none has been confirmed, at least here on Sats UK. Also, it's a struggle to make sense of using a satellite that's now 18 years old to be brought out of its sleep to launch a DTH service - it can't be too long before it starts to have large enough inclination swings to render it unsuitable for DTH use. * The transmission configuration of 8PSK modulation with an FEC of 5/6 will hit fringe reception as the minimum C/N ratio for this configuration is 9.4db - probably a good reason why those of us on the western fringes of Europe are (now) getting nothing from these transmissions with modest (<1 metre) sized dishes. [I]C'est la vie.[/I] I wonder what size of dishes Vivacom subscribers in Bulgaria are using for the service currently at 45 East? My €0.02 assumption? These Vivacom tests are using an otherwise currently unpublised beam (possibly the "Superbeam") on Hotbird 13F or 13G, until evidence proves otherwise. [/QUOTE]
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