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charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Subject: Re: [Starlink] Quick questions about Starlink user terminal X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 May 2023 21:59:06 -0000 On 12/05/2023 9:48 am, Sirapop Theeranantachai via Starlink wrote: > Hi, I'm currently working on packet simulation analysis over large LEO=20 > constellations such as Starlink, and I do have a few questions on the=20 > Starlink commodity terminals and ISL. > > 1) Is the commodity hardware capable of forming multiple GSL channels=20 > to multiple satellites? If it's not possible, is it possible that the=20 > hardware allows multiple downlink but only one uplink? Based on our observations, no to both questions - one sat at a time.=20 We've noticed that power use goes up with observed downlink rate,=20 though. Mike Puchol might be able to comment a bit more here as he's=20 tried to get between Dishy and the birds. > > 2) Does Starlink currently use laser ISL or is it planning in the=20 > future? If so, how is the link performance due to laser accuracy? Laser links are in use, and most likely also between different orbital=20 planes, but use is a bit weird. Traffic from Tarawa (Kiribati) emerges=20 onto the Internet in Auckland, NZ, 4200 km away and not near a common=20 orbital plane in Starlink's dominant 53.2 deg constellation. Link=20 performance - how long is a piece of string? We've seen significant=20 transient outages from Tarawa, but when there is no outage, rates are=20 comparable to what you'd get elsewhere (anecdotally - we haven't seen=20 any actual test results from there yet, the owner of the only unit there=20 has reported regulatory issues). > > Best, > Mark > > _______________________________________________ > Starlink mailing list > Starlink@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/starlink > --=20 **************************************************************** Dr. Ulrich Speidel School of Computer Science Room 303S.594 (City Campus) The University of Auckland u.speidel@auckland.ac.nz http://www.cs.auckland.ac.nz/~ulrich/ ****************************************************************