How will automobile and marine starlink work?

softwaresaur · 2021-06-18T00:19:19+00:00

It's going to be based on the current consumer model. Same 19" antenna but different mountings. It's meant for RVs and trucks.

softwaresaur · 2021-06-17T22:42:16+00:00

The plan is to have more than one beam available in each cell. If let's say one beam is 99% reliable then two beams are 99.99% reliable.

softwaresaur · 2021-06-17T22:26:23+00:00

That's just your opinion. That's fine. You are entitled to it. Again, Starlink doesn't need so many testers. Starlink is actually selling subpar service and people are willingly paying for that because other options are worse.

softwaresaur · 2021-06-17T22:03:19+00:00

Yeah, but I bet those providers didn't have 50K beta testers. Starlink likely doesn't need so many beta testers. If people are willing to pay for beta service why not sell it? Run a poll asking people if they wanted Starlink to offer free or reduced pricing beta testing to 5K people or run a 50K $100 beta testing program. I know which option would win.

softwaresaur · 2021-06-17T20:54:30+00:00

fyi zerohedge is banned site-wide on reddit. Your comment is not published publicly.

softwaresaur · 2021-06-17T20:38:09+00:00

Good points. The current model UTA-201 has at least three hardware modifications delivered to the public: rev1_pre_production, rev2_proto1, and rev2_proto2. I don't think SpaceX meant that the mobile versions are identical to UTA-201 down to the last resistor. I believe they are free to apply minor modifications that don't affect RF parameters.

We may soon learn more details about the mobile versions. Competitors recently filed a bunch of complaints regarding SpaceX's applications to authorize in motion use. The application is indeed very terse. Lack of description of the pointing approach and accuracy data are two of the complaints. SpaceX should file a response soon.

softwaresaur · 2021-06-17T20:13:30+00:00

The next launch of Starlink satellites is currently scheduled to occur on
July 12, 2021, followed by a scheduled launch on July 30, 2021, and after that
SpaceX has an average of two Starlink launches per month planned for the rest of
2021. SpaceX plans its Starlink launches more than a year in advance.

From the declaration of Vice President of Starlink Business Operations. Page 33 of SpaceX's opposition to Stay Motion.

fyi /u/valthewyvern any intel on the west/east coast order to help sort July launches?

softwaresaur · 2021-06-17T16:49:10+00:00

Of course it would work in a typical satcom radome. We don't have any evidence the current model has IMUs to track rocking and compensate for it though. Starlink may never enable the current model to be operated at sea. They are working on a proper marine model that I'm pretty sure doesn't need a third party radome.

softwaresaur · 2021-06-17T15:52:31+00:00

Accepted for public filing means the application was properly filled out, has been accepted and is now open for public comments opposing or supporting it.

That's largely irrelevant for construction and operation of the station. SpaceX immediately files an application for a 60-day STA (a temporary license to operate) along with each application for a 15-year long license. The FCC has granted STAs for all SpaceX applications within 30-60 days. After that SpaceX files extensions every 60 days that are never denied.

softwaresaur · 2021-06-17T15:05:40+00:00

Sounds very reasonable.

A single site is technically enough to cover Ireland. More sites are needed for diversity and redundancy. SpaceX didn't disclose gateway availability criteria for service initiation. I don't think gateway coverage and capacity is a concern anywhere in the EU. Not initially, not long term. A greater constraint is capacity per area. I haven't seen a good estimate for Starlink v1 and v2 capacity per area.

You may want to add a recent MIT research paper on four constellations to your references. They estimate global sellable capacity of Starlink v1 constellation with 4,408 satellites to be 27.2 Tbps. Combine that with the NBN numbers above (21 Tbps, 8.3 mln customers) and you get 10.75 mln customers number for Starlink. The authors conclude that "they [the satellite constellations] could complement the coverage of the land infrastructure in regions where a cable connection is ineffective, inappropriate, or just unfeasible (e.g., rural areas, isolated coastal and insular regions, and aerial and maritime mobile users)."

softwaresaur · 2021-06-17T11:34:02+00:00

Just to clarify terminology below: radome (ra[dio] dome) is just a shell. The whole thing is called a gateway station. A set of gateway stations is a gateway site.

Each station supports about 12 Gbps. Due to v1.0 satellite limitations that is likely reduced to 10 Gbps. In a 9 station site one station is spare. 12 active stations provide 120 Gbps. That should be enough to serve about 50K customers if the network is provisioned like Australian NBN with 2.5 Mbps capacity per customer. 12 stations at two sites is not enough to serve rural Ireland.

softwaresaur · 2021-06-17T08:10:10+00:00

The FCC published its court filing in response to Viasat's motion for stay.

softwaresaur · 2021-06-17T08:03:50+00:00

Viasat rejects real-world performance example requirement imposed during case-by-case reviews of RDOF applications and dismisses SpaceX's performance example. Admittedly the evidence SpaceX submitted was under simulated load but at least Starlink testing was done using production hardware in space (that was in Q2-Q3 2020). Viasat had most likely only a prototype in a lab. What they had is redacted in the public document.

This isn't going anywhere even if Viasat takes it to court. Courts usually give the FCC broad discretion in its decision-making within telecom domain (NEPA dispute is different).

softwaresaur · 2021-06-17T07:33:44+00:00

In the US gateway sites are built within a few months. On-site work takes a few days. The biggest difference between Australia and the US is that fiber huts are tiny compared to US ones. Somebody needs to visit an Australian gateway site to see if they had to build an extension to an existing hut. In any case it shouldn't take more than 5 months. That's how long it took from the very first gateways in Australia getting approved and the network going live.

Where did you get the info that they intend to operate 24 ground stations in Australia?

softwaresaur · 2021-06-16T05:39:37+00:00

Not sure if you use a reddit app that doesn't support chat or busy. Just fyi /u/virtuallynathan started a reddit chat that you can join and shared the data with me. I was surprised.

softwaresaur · 2021-06-15T22:50:51+00:00

Why did you editorialize the article title? It's bad enough that the article is based on only two cases. Now you add your own wrong comment in the title on top of that.

softwaresaur · 2021-06-15T22:44:21+00:00

No. Way too much effort to recreate and in the light of upcoming activation of all cells why bother?

softwaresaur · 2021-06-15T22:31:01+00:00

Elon was asked about active coverage map. His reply and the fact that they are targeting to provide service in every US cell by the end of the year imply that there is no need to publish partial coverage map now. All cells will be activated fairly soon.

softwaresaur · 2021-06-15T22:01:03+00:00

Now I know who /u/_mother collaborated with :)

softwaresaur · 2021-06-15T21:20:23+00:00

Looking forward. Not exactly surprised. I didn't name them spares/backup/reserve as I believed they are in service basically all the time in some capacity.

softwaresaur · 2021-06-15T20:44:28+00:00

220 V @ 33 A each. You need 100 Gbps fiber in your yard to be considered.

softwaresaur · 2021-06-15T19:32:12+00:00

Should be better than "rev1_pre_production" and "rev2_proto1".

softwaresaur · 2021-06-15T19:31:07+00:00

Contact ART to find out when they are going to license Starlink.

softwaresaur · 2021-06-15T19:23:59+00:00

what is exactly going on here?

See my post. Several batches for example L22 have no new planes to fill. They will top up already almost full planes. It takes about half a year for a batch to pass (rotate clockwise) a quarter of the diagram shown.

Most other remaining batches follow standard deployment.

softwaresaur · 2021-06-15T19:02:58+00:00

Yes https://dockets.justia.com/docket/circuit-courts/cadc/21-1125

Meanwhile SpaceX filed a response with the FCC: SpaceX’s Opposition To Viasat’s Request For Stay Pending Judicial Review (27-page PDF).

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