//Second, while I have not worked out the math for Starlink, LEO satellites can easily have 15-20 minute downlink windows, so 2-4 minutes should not be typical.So can you calculate first? and then you will write nonsense about 15-20 minutes for StarLink?//to calling the SpaceX engineers idiots.This is a good point. So we have 2 options for organizing a feeder channel with a speed of 20 Gbps. Option A Proven many times, as OneWeb engineers did. to use one feeder channel at a time from a single 1.5m antenna on the Gateway with a maximum throughput of 32 Gb and a typical 25+ GbpsOption B, which, according to your words, was implemented by SpaceX engineers - use simultaneously 2 feeder lines and 2 Antennas on different gateways, each with a maximum capacity of 32 Gbps and a typical 25+ Gbps. In total, they transmit either 25 or 50 Gbps to the satellite, although 20 gbps are needed. At the same time, there is some kind of magic box on the satellite for redistributing traffic at the packet level on board (a task that no manufacturer in the world has solved so far for a serial satellite ). Naturally, this unique magic box increases the cost of the satellite, requires additional power, and reduces the reliability of the satellite. At the same time, no one knows about the magic box yet, and there is no mention in any SpaceX document, although its appearance would be a sensation and an achievement much greater than laser channels.From my point of view, the Engineer who proposed option B instead of A can be called an idiot. But note that you called SpaceX engineers idiots, not me ..

from multiple aerial photos the starlink base stations have 9 domed steerable parabolic dishes in a 3x3 grid

At the same time, there is some kind of magic box on the satellite for redistributing traffic at the packet level on board (a task that no manufacturer in the world has solved so far for a serial satellite ).

Quote from: SpaceCadet1980 on 02/10/2022 07:00 pm//Second, while I have not worked out the math for Starlink, LEO satellites can easily have 15-20 minute downlink windows, so 2-4 minutes should not be typical.So can you calculate first? and then you will write nonsense about 15-20 minutes for StarLink?

//Second, while I have not worked out the math for Starlink, LEO satellites can easily have 15-20 minute downlink windows, so 2-4 minutes should not be typical.

//to calling the SpaceX engineers idiots.This is a good point. So we have 2 options for organizing a feeder channel with a speed of 20 Gbps.

From my point of view, the Engineer who proposed option B instead of A can be called an idiot. But note that you called SpaceX engineers idiots, not me ..

Quote from: vsatman on 02/11/2022 06:29 amSo can you calculate first? and then you will write nonsense about 15-20 minutes for StarLink?You are the one who made up a number based on nothing. I gave a number based on experience working LEO satellites. You can either choose to learn something about the subject and do the math yourself, or you can stop making baseless assertions.

So can you calculate first? and then you will write nonsense about 15-20 minutes for StarLink?

Quote from: SpaceCadet1980 on 02/11/2022 05:23 pmQuote from: vsatman on 02/11/2022 06:29 amSo can you calculate first? and then you will write nonsense about 15-20 minutes for StarLink?You are the one who made up a number based on nothing. I gave a number based on experience working LEO satellites. You can either choose to learn something about the subject and do the math yourself, or you can stop making baseless assertions.Oh, let's analyze this nonsense, so the 2 most banal questions:1) What is the orbital period of the StarLink Satellite around the Earth?2) What is the diameter of the circle in the sky that the gateway antenna sees?Anyone with even the slightest interest in StarLink should know these numbers. Next 2 calculations at the elementary school level.a great way to understand what is behind your words and what is your real experience in satellite communications :-), and is there any point in reading further everything that you write ..[zubenelgenubi: Fixed quotes. Please proofread your reply posts before posting.]