On 12/05/2023 9:48 am, Sirapop Theeranantachai via Starlink wrote:
Hi, I'm currently working on packet simulation analysis over large LEO
constellations such as Starlink, and I do have a few questions on the
Starlink commodity terminals and ISL.
1) Is the commodity hardware capable of forming multiple GSL channels
to multiple satellites? If it's not possible, is it possible that the
hardware allows multiple downlink but only one uplink?
Based on our observations, no to both questions - one sat at a time.
We've noticed that power use goes up with observed downlink rate,
though. Mike Puchol might be able to comment a bit more here as he's
tried to get between Dishy and the birds.
2) Does Starlink currently use laser ISL or is it planning in the
future? If so, how is the link performance due to laser accuracy?
Laser links are in use, and most likely also between different orbital
planes, but use is a bit weird. Traffic from Tarawa (Kiribati) emerges
onto the Internet in Auckland, NZ, 4200 km away and not near a common
orbital plane in Starlink's dominant 53.2 deg constellation. Link
performance - how long is a piece of string? We've seen significant
transient outages from Tarawa, but when there is no outage, rates are
comparable to what you'd get elsewhere (anecdotally - we haven't seen
any actual test results from there yet, the owner of the only unit there
has reported regulatory issues).
Best,
Mark
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Dr. Ulrich Speidel
School of Computer Science
Room 303S.594 (City Campus)
The University of Auckland
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http://www.cs.auckland.ac.nz/~ulrich/
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