Share with friends and circle of friends via wechat scanning QR code < / P > < p > on August 20, US space exploration technology company SpaceX submitted a revised document on its "Starlink" satellite internet project to the Federal Communications Commission (FCC) on Thursday, local time, which disclosed more new details, Including the company's plan to use interstellar spacecraft as the main vehicle for launching satellites < p > in the newly submitted document, SpaceX called the revised star chain project "Gen2 system". The company wrote: "the second generation system is mainly designed to supplement the first generation system currently being deployed by SpaceX. Although the initial project provided unprecedented capacity for our satellite system, the demand for more broadband continues unabated, and the demand for user connectivity has never been more important. " < p > Star chain is a capital intensive project of SpaceX, which aims to establish a satellite Internet with tens of thousands of satellites in order to provide high-speed Internet services to consumers anywhere on the earth. SpaceX has launched a beta version of the service for some consumers, charging $99 a month. In the past year, SpaceX has also begun to seek to provide a network for aviation services and expand services to large mobile vehicles, such as ships and trucks < p > although the star chain Internet service is still in the testing stage, SpaceX recently said that so far, the network has about 90000 users in 12 countries, and more than 500000 potential customers place orders or pay refundable deposits. SpaceX has launched more than 1740 satellite chain satellites, and its first generation system will be launched in November 2019. The second generation system plans to launch nearly 30000 satellites in total < p > SpaceX indicates that the second generation satellite chain satellites are heavier, and they will be larger and more powerful than the original design. At present, the satellite chain launched by SpaceX weighs about 260 kg and can generate about 3 kW of solar energy, with a maximum bandwidth of about 18 Gbps per second. In contrast, the satellites of the second generation system seem to be several times larger, each weighing about 850-1250kg. The maximum bandwidth will be three times that of the existing satellites, providing about 15-20 kW of solar energy. This will enable these satellites to provide "support expansion capability" for SpaceX's network and "accommodate more payloads in the future", which means that satellite chain satellites may be able to host sensors or satellite antennas for other companies < p > the "preferred configuration" of the second generation satellite chain network will include 29988 in orbit satellites deployed at 9 different altitudes, ranging from 340km to 614km. Previously, SpaceX had said that its satellite chain network would have 30000 satellites at eight altitudes, ranging from 328 km to 614 km. The revised document said: "SpaceX will aim at multiple dip angles and more evenly distribute its capacity by latitude to ensure better and more consistent global coverage." < p > < / P > < p > in addition, SpaceX's revised plan "nearly doubles the number of satellites deployed in solar synchronous orbit", which will enable the company to provide better services for "polar regions such as Alaska" < p > the company also pointed out: "SpaceX has provided its satellites with advanced propulsion capability, so the risk of collision with large objects should be reduced to zero when they can maneuver." When the satellite chain fails, SpaceX will re-enter the earth's atmosphere to dispose of the satellite, burn it down and disintegrate it. SpaceX stressed that if the satellite chain is out of control, the low altitude of the satellite in orbit means that it will only operate in orbit "less than four years" before re-entry into the atmosphere < p > space debris is another threat that SpaceX aims to deal with by improving the system design. This threat includes both the threat of space debris to the satellite chain and the threat posed by the satellite chain itself. The company wrote: "SpaceX has realized that when it is unlikely to collide with small debris or meteoroids, our system may become a source of space debris, which may cause jet aircraft or spacecraft out of control. SpaceX continues to explore ways to make its satellites more resistant to this threat. Although the design of these protection functions remains to be finalized, SpaceX has improved the redundancy of power and propulsion systems. " < p > SpaceX previously mentioned that the Starship will bring additional capabilities to the deployment of its star chain network, but the latest document outlines its plan to use this huge aircraft as the main delivery vehicle of second-generation system satellites. The company's leadership had previously boasted about the enhancements that starships would bring. Gwynne shotwell, President of SpaceX, said in 2019 that its Falcon 9 rocket could launch 60 star chain satellites at a time, but the Starship would be able to "launch 400 satellites at a time" < p > the company also said that modifying the altitude and design of the satellite chain will also allow SpaceX to launch the satellite directly into the predetermined orbit using the interstellar spacecraft. "The revised orbital spacecraft will enable stand-alone launch activities to use the capabilities of interstellar spacecraft to deploy satellites at a faster speed without having to wait for a period of time and maneuver in berthing orbit," the document said. SpaceX can deploy the satellite into orbit within weeks rather than months after launch. " < p > SpaceX also talked about the backup deployment plan of the second generation system, which will continue to use its Falcon 9 rocket in case the Starship has not been put into use when the new star chain system is launched. In the past year, the company has completed several prototype starship flight tests and is approaching its first orbital flight attempt. SpaceX recently integrated the Starship prototype S20 into a super heavy rocket booster for the first time. Musk said last weekend that it is expected that the first orbital starship should be ready to fly in a few weeks. At present, it is only waiting for regulatory approval < p > Star chain and starship represent billions of dollars of projects respectively, which are crucial to the growth of SpaceX, prompting the company's valuation to soar to $74 billion（ Small) < / P > < p >