Showing posts with label LEO. Show all posts
Showing posts with label LEO. Show all posts

Sep 6, 2019

LEO and the Internet

Low-Earth Orbit (LEO) satellites are much smaller and orbit closer to Earth than traditional satellites. The lower orbit dramatically reduces the time lag that usually comes with satellite broadband internet. The purpose of these satellites is to blanket the earth and provide wireless internet service everywhere.
Elon Musk's SpaceX has plans to launch as many as 12,000 satellites as part of its Starlink constellation. Each Starlink satellite weighs about 500 pounds (227 kilograms) and is about the size of an office desk. They will deploy into orbit about 273 miles (440 kilometers) up. After the first successful launch, the Federal Communications Commission (FCC) approved Starlink’s formal request to offer broadband service. That service will take a few years to get enough satellites in place for a viable network. Starlink’s ultimate goal is to launch 4,425 satellites by 2024, but it will likely start offering service before then.
Amazon plans to launch a constellation of 3,236 satellites into low Earth orbit in order to provide internet to “unserved and underserved communities around the world.” Amazon confirmed that Kuiper Systems is one of its projects.
Telesat successfully launched a test LEO satellite in January 2018. Telesat announced during July 2019 that it had partnered with the Government of Canada in a mission to provide affordable high-speed Internet connectivity across rural and remote areas of Canada through the development of Telesat's LEO Satellite Constellation. Blue Origin will launch the next Telesat LEO satellites using its New Glenn rocket, which is currently under construction. Telesat plans to launch 120 LEO satellites by 2021, all with Blue Origin.
OneWeb has an initial 600-satellite constellation currently being built out to provide global satellite Internet broadband services beginning in 2021. The first six satellites of the constellation were launched in February 2019 and plans to launch 900 LEO satellites by the end of 2019 using Virgin Orbit and Blue Origin. OneWeb is considering nearly quadrupling the size of the satellite constellation over time by adding 1,972 additional satellites.
Jeff Bezos’s rocket company, Blue Origin, is not building a satellite network, but is building reusable spacecrafts to launch satellites for a variety of companies. Telesat, the largest satellite internet provider in Canada, is one such company.
Loon, started by Google and now run by parent company Alphabet, is slightly different from the other companies. It is not building a satellite constellation, but it is using similar concepts. Instead of an orbiting network in space, Loon uses weather balloons to float transmitters high in the atmosphere, essentially creating a floating network in the sky.
Facebook, filed a request with the federal government to fly a single experimental satellite in low orbit. It has not committed to deploy a full-fledged network or revealed much about its strategy. Other smaller companies with smaller wallets have also begun to join the race.


All will also require a network of Earth stations for the satellites to communicate with. There is much competition, many dollars to spend, and much work to do before we see the results in our living rooms.