Beijing, November 2 (Chen Lin, reporter Fu Yifei) The reporter learned from China Aerospace Science and Technology Corporation on the 2nd that the group company plans to build the "Hongyan Satellite Constellation Communication System" in 2020. The system will consist of 60 low-orbit small satellites and a global data service processing center. It has real-time two-way communication capabilities around the clock, at full time and under complex terrain conditions, providing users with global real-time data communication and integrated information services.
According to reports, the Hongyan constellation will integrate multiple satellite application functions. Its satellite data collection function can realize large-area information collection, meet the monitoring data information transmission requirements in the fields of ocean, meteorology, transportation, environmental protection, geology, disaster prevention and mitigation, and provide global asset status for large energy enterprises and engineering enterprises. Supervision, personnel positioning, emergency rescue and communication services. Its satellite data exchange function provides two-way, real-time data transmission on a global scale, as well as multimedia data services such as short messages, pictures, audio, and video.
The system will be equipped with an automatic ship identification system, which can receive the information sent by the ship on a global scale, fully grasp the navigation status, position and heading of the ship, and realize the monitoring and fishery administration of the navigation vessels in the open sea. It will also be equipped with broadcasting. Automatic related monitoring load, which can track, monitor and control global aviation targets from outer space, enhance flight safety and emergency search and rescue capabilities.
In addition, the system will have a mobile broadcast function, which can broadcast audio, video, images and other information to the global coverage area, which will be an effective means to realize public-to-multiple-point information transmission. The navigation enhancement function can be Beidou navigation. The satellite augmentation system provides an information dissemination channel to improve the positioning accuracy of the Beidou navigation satellite.
The GPS Antenna, also known as the Global Positioning System Antenna, is a crucial component in modern navigation and positioning systems. It serves as the primary interface between GPS satellites and GPS receivers, enabling accurate and reliable location tracking. Below is a detailed introduction to GPS Antennas, highlighting their key features, types, applications, and technical specifications, emphasizing the importance of their design and placement for optimal signal reception and performance.
Key Features:
Signal Reception: GPS Antennas are designed to efficiently receive signals from GPS satellites orbiting the Earth. These signals, transmitted at frequencies such as 1575.42 MHz (L1) and 1228 MHz (L2), are captured by the antenna and converted into electrical signals for processing.
Precision and Accuracy: The antenna's design and materials contribute to its ability to receive signals with high precision and accuracy. This ensures that the GPS receiver can determine the vehicle's or device's position with minimal error.
Multi-Band Support: Some GPS Antennas support multiple frequency bands, allowing them to receive signals from different constellations of satellites, enhancing their versatility and reliability.
Durability: GPS Antennas are typically built to withstand harsh environmental conditions, including exposure to weather elements, vibrations, and other potential stressors.
Types:
Passive Antennas: These antennas do not contain any active electronic components, relying solely on the antenna's design to capture and transmit signals. They are often simpler and lighter than active antennas but may have lower gain and sensitivity.
Active Antennas: Also known as GPS Active Antennas, these devices incorporate low-noise amplifiers (LNAs) to boost the received signal strength. This improves their sensitivity and performance, especially in environments with weak signals or interference.
External vs. Internal Antennas: External GPS Antennas are typically mounted on the exterior of a vehicle or structure, providing better line-of-sight to the sky and thus better signal reception. Internal antennas, on the other hand, are integrated into the device or vehicle's interior, offering a more streamlined design but potentially compromising signal reception.
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