Placing a gateway at the Fiji teleport results in satellites that cover Tonga being serviced. However, satellite density, but most importantly, GSO protection, take out a significant portion of the coverage from the satellites.
They would need to lower minimum elevation (now 25° everywhere) to improve the situation. With things as-is, Tonga would be covered by 1-2 satellites which should be enough for emergency service restoration.
You can play around with this on my tracker at https://starink.sx, I will be adding the temporary gateway in a few minutes.
Please not that the date line causes some weird issues with the map and the algorithms, which I’m still trying to fix. You can thank whoever thought moving from -180° to +180° across a line was a good idea.
On Feb 7, 2022, 22:24 +0100, David Lang <david@lang.hm>, wrote:
the dish aimes at where it sees the most satellites, not necessarily 53. I took
my dish to a campground where there were trees to the north and it ended up
pointing straight up (Los Angeles area) performance was fine.
when you power it on, the dish tilts and swivels to point straight up (no idea
what the angle logic is), and after a few min of watching the sky will re-aim
itself if/as needed.
David Lang
On Mon, 7 Feb 2022, Ben Greear wrote:
Date: Mon, 7 Feb 2022 13:18:49 -0800
From: Ben Greear <greearb@candelatech.com>
To: starlink@lists.bufferbloat.net
Subject: Re: [Starlink] Starlink for Tonga?
90 or even much smaller percentage is a lot better than zero.
I wonder if they can point the dish towards the horizon to pick up the sat
where
it can best see the functional downlink. I realize the dish auto-points
itself
now, but surely engineers that can design that can also design an 'off'
switch
for that and let their on-the-ground folks do some hacking....
Thanks,
Ben
On 2/7/22 11:05 AM, Christian von der Ropp wrote:
But in practice the satellites won't be sitting and waiting at the edge of
this 940km radius. They are moving in and out the radius and the question is
if
satellite density is high enough so that once the serving satellite loses
its gateway link there's another satellite in the 940km radius which also
covers
Tonga. And then this new satellite cannot be within certain elevation
angles (~60-80° at 0° azimuth) where the geostationary arc crosses Fijian
skies and the
gateway antennas have to seize emission. My gut feeling is that
availability in Tonga would be <90% simply because it's too far out at the
edge of a Fijian
gateway's range where there will be frequent service interruptions.
Am 07.02.2022 um 19:51 schrieb Nathan Owens:
The current coverage radius of a gateway/ground station with a 25 degree
minimum elevation is ~940km, so nothing in theory.
On Mon, Feb 7, 2022 at 10:50 AM Daniel AJ Sokolov <daniel@sokolov.eu.org>
wrote:
Hello,
I hope this is not offtopic: Starlink wants to build a ground station
on
Fiji to supply Tonga with internet.
The distance between Tonga and Fiji is about 750 km minimum. That's
quite the distance.
What does Starlink have to do to make this work?
Cheers
Daniel
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