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Satellite Launches and Retirements
Eutelsat orders eutelsat 10b satellite for inflight and maritime connectivity services
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<blockquote data-quote="Fisty McB" data-source="post: 1079806" data-attributes="member: 389824"><p>A little difficult to work out. Currently Eutelsat 10A on Ku frequencies only transmits in the FSS & Telecom bands (10.7 - 11.7 GHz & 12.5 - 12.75 GHz) while Eutelsat 9B at present uses only the DBS band (11.7 - 12.5 GHz). As a general rule of thumb, with a few exceptions, over European skies satellites utilising FSS & Telecom frequencies are spaced 3 degrees apart while DBS frequencies are spaced 4 degrees apart where the footprint target areas have similar overlaps. Some exceptions include Eutelsat 3B (3.1 East) and Astra 4A (4.8 East) sharing the Telecom band (this caused significant issues some time back when RTS of Serbian started transmitting on the Telecom band on Astra 4A, crippling reception of services on nearby frequencies on Eutelsat 3B inc. the Digea Greek DTT feeds) , while Bulgariasat at 1.9 East is only ~3 degrees from Astra 4A in the DBS band, while Badr 4 on DBS is only 2 - 2.5 degrees away for the Astra constellation at 28.2 to 28.5 East - though the lower powers on the Badr 4 EMEA footprint across most of Western & Central Europe makes it less of a headache for Sky & Freesat installs in UK & IRL.</p><p></p><p>So with knowing that, 9 East potentially using FSS & Telecom frequencies would have to be careful not to suffer from and give mutual interference from 7 East, especially where footprints overlap. AFAIK, there aren't any spot beams on 9B that don't have the potential to not cause interference with the European beams on 7B & 7C. Could be possible though that the Telecom band or one of the FSS sub bands on 7 East may be "switched off" for European use, to be handled by Eutelsat 9B instead (with an addition of improved SNR on such frequencies compared at present to Eutelsat 10A due greater spacing away from 13 East and higher powered (spot) beams compared to the "W-series" style footprint on 10A)?</p></blockquote><p></p>
[QUOTE="Fisty McB, post: 1079806, member: 389824"] A little difficult to work out. Currently Eutelsat 10A on Ku frequencies only transmits in the FSS & Telecom bands (10.7 - 11.7 GHz & 12.5 - 12.75 GHz) while Eutelsat 9B at present uses only the DBS band (11.7 - 12.5 GHz). As a general rule of thumb, with a few exceptions, over European skies satellites utilising FSS & Telecom frequencies are spaced 3 degrees apart while DBS frequencies are spaced 4 degrees apart where the footprint target areas have similar overlaps. Some exceptions include Eutelsat 3B (3.1 East) and Astra 4A (4.8 East) sharing the Telecom band (this caused significant issues some time back when RTS of Serbian started transmitting on the Telecom band on Astra 4A, crippling reception of services on nearby frequencies on Eutelsat 3B inc. the Digea Greek DTT feeds) , while Bulgariasat at 1.9 East is only ~3 degrees from Astra 4A in the DBS band, while Badr 4 on DBS is only 2 - 2.5 degrees away for the Astra constellation at 28.2 to 28.5 East - though the lower powers on the Badr 4 EMEA footprint across most of Western & Central Europe makes it less of a headache for Sky & Freesat installs in UK & IRL. So with knowing that, 9 East potentially using FSS & Telecom frequencies would have to be careful not to suffer from and give mutual interference from 7 East, especially where footprints overlap. AFAIK, there aren't any spot beams on 9B that don't have the potential to not cause interference with the European beams on 7B & 7C. Could be possible though that the Telecom band or one of the FSS sub bands on 7 East may be "switched off" for European use, to be handled by Eutelsat 9B instead (with an addition of improved SNR on such frequencies compared at present to Eutelsat 10A due greater spacing away from 13 East and higher powered (spot) beams compared to the "W-series" style footprint on 10A)? [/QUOTE]
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Eutelsat orders eutelsat 10b satellite for inflight and maritime connectivity services
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