What is the theoretical maximum SNR for a Dishy-sized array?
Quote from: envy887 on 11/10/2021 12:08 amWhat is the theoretical maximum SNR for a Dishy-sized array? According to my calculations, 13.64 dB for the case when the satellite is shining at the terminal with 48 cm diameter at a 90 degrees elevation angle . In this case, it works 100% of terminal`s square. But if the elevation angle is less than 90 degrees , then % the working area is equal to the sinus of the elevation angle.. For 60 degrees this 84% , for 30 degrees only 50%..... and really SNR will be less..
* Shares of payments processing company Shift4 surged in trading on Wednesday after the company announced a five-year partnership with SpaceX’s Starlink satellite internet service.* “Starlink is a cornerstone, global client opening up opportunity throughout the globe. By servicing the business globally, Shift4′s [total addressable market] expands in all the verticals we serve,” the company said.* Jared Isaacman, founder and CEO of Shift4, notably became an astronaut when he flew to orbit with SpaceX in September on the historic Inspiration4 private mission
Quote from: vsatman on 11/10/2021 08:47 amQuote from: envy887 on 11/10/2021 12:08 amWhat is the theoretical maximum SNR for a Dishy-sized array? According to my calculations, 13.64 dB for the case when the satellite is shining at the terminal with 48 cm diameter at a 90 degrees elevation angle . In this case, it works 100% of terminal`s square. But if the elevation angle is less than 90 degrees , then % the working area is equal to the sinus of the elevation angle.. For 60 degrees this 84% , for 30 degrees only 50%..... and really SNR will be less..The dish is 59 cm.
Rondaz had been posting about the 10 Transporter-1 polar starlink sats being dropped in the orbit update thread, which seemed unusual.Christian Frhr. von der Ropp on LinkedIn made an interesting comment that SDA had warned about rad hardness of lasercomm terminals for the Transport Layer constellation, and the deorbit oddly seems to coincide with the spike in solar flares around October 26https://www.linkedin.com/feed/update/urn:li:activity:6864150263997972480/Did those sats really suffer more than previous Starlink sats? Was that a function of the polar orbit/solar flare combo? Were only the LCT's damaged? They are clearly operational enough to perform deorbit for now...
The dish is 59 cm.
How about the new dish?
Quote from: Asteroza on 11/11/2021 11:13 pmHow about the new dish? new dish is 50 x 30 cm, antenna size 48 x 29 cmBUT!!! is very important that Aperture efficiency is 74% (for UT1 is only 57%)Maximum Transmit Duty Cycle is 14% (for UT1 is only11%)Summary - Gain is the same, Download speed the same , Upload speed will be about 25% better..
Where are those efficiency numbers from?
Inter-satellite laser communications means Starlink can carry data at speed of light in vacuum all around Earth before touching ground.Over time, some amount of communication can simply be from one user terminal to another without touching the Internet.
Q: My parents are about to travel the earth by boat and it would be great if they could use Starlink for their voyage!A: Should work everywhere for global maritime by roughly middle of next year (enough sats with laser links launched). Until then, it will be patchy when far from land.
Bruno mentions that constellations are limiting launch windows. SpaceX’s Bill Gerstenmaier then mentions that SpaceX worked with ULA to provide more accurate Starlink data to free up windows for the Lucy launch. #ascendspaceGerst adds that Russia’s ASAT test “created more debris than any megaconstellation”; a “huge mess.”Bruno: there has to be consequences for that kind of behavior. #ascendspace
Well, Starlink.com updated a lot of pre-orders today. Most everyone that has mid to late 2021....doesn't anymore....I now have mid 2022......Does ANYONE know what the roll out issue is in the USA? They say chip shortages...but I see many post daily of people in other countries all over the world getting their dishy shipped right when they order...but rarely see anyone in the states post getting one. I am just about what is going on at this point with it. I just feel that there has got to be something else besides the chips going on.
Thank you for being a supporter of Starlink! Over 14 million people have inquired about Starlink service in their area and today Starlink is available in over 20 countries (and counting).The Starlink team has been working hard to expand service and increase capacity while continuously improving quality of service. We will be able to accommodate more users per area as we increase the number of satellites in orbit.Check delivery timelines in your accountSilicon shortages over the last 6 months have slowed our expected production rate and impacted our ability to fulfill many Starlink orders this year. We apologize for the delay and are working hard across our engineering, supply chain, and production teams to improve and streamline our product and factory to increase our production rate.You can check estimated delivery times by logging into your account page on Starlink.com. You will still receive an email from the Starlink team when your order is ready to ship, and you may cancel your order at any time for a full refund of your deposit.Latest Starlink now in productionWe recently released the latest version of Starlink which was designed for high volume manufacturing. The latest version of Starlink has comparable performance to the previous version and will begin to ship globally next year.Expanding to more countries across the worldSince our October 2020 launch in the United States we have expanded our service to 20 additional countries: Canada, United Kingdom, Germany, New Zealand, Australia, Austria, France, Netherlands, Belgium, Denmark, Ireland, Switzerland, Portugal, Chile, Poland, Italy, Czech Republic, Mexico, Sweden, and Croatia. Pending regulatory approval, we are planning to launch in an additional 45+ new countries by the end of 2022.More satellites in orbit with newer technologyWe recently completed our 31st Starlink launch with our latest generation of satellites that are equipped with inter-satellite laser links, which enable our satellites to transfer data between each other. Once fully deployed, inter-satellite laser links will make Starlink one of the fastest options available to transfer data around the world.Thank you for your continued support!The Starlink Team
is going to get the foot in the door in as many places as it can to get ahead of competition.