Recently, Galaxy Aerospace Company successfully achieved the first end-to-end (T2T) low orbit satellite communication test in China on Lingxi 03 satellite. It is reported that this test refers to communication between satellite ground terminals directly through the exchange equipment on the satellite, without the need for data transfer through ground gateway stations. In this working mode, the communication delay can be reduced by 50% and the flexibility and availability of the entire system can be improved due to the elimination of the transit link at the gateway station. Zhu Zhengxian, Chief Technology Officer of Galaxy Aerospace, stated that usually, if users want to access the internet through satellite, they not only need to use satellite terminals to connect to the satellite, but also need to transfer the data of this satellite to the ground public network through ground gateway stations. The significance of this test is to provide a more flexible communication mode for satellite communication, which can be achieved in remote areas such as polar regions and high seas, even without the coverage of signal stations. It is reported that achieving end-to-end low orbit satellite communication is not easy, and one of the most challenging components is the digital payload. The Galaxy Space Lingxi 03 satellite, launched on July 23, 2023, is equipped with a millimeter wave multi beam digital payload with a capacity of tens of gigabits per second. This can be understood as installing an intelligent "brain" on the satellite, allowing it to flexibly allocate its communication resources, automatically calculate and adjust beams according to business needs, and achieve "free combination" of data channels transmitted on the satellite through digital transparent forwarding technology. In the future, Galaxy Aerospace will further verify the next generation of low orbit broadband satellite communication technology in orbit, including onboard switching, signaling beams, and continuously explore new modes of communication satellite applications. (Reporter Fu Yifei) (Xinhua News Agency)