Abstract
The appropriate high-accuracy time and frequency standard is basic to normal operation of various kinds of aerospace application systems, which influences systems performance. The study of establishing suitable time and frequency standard and intersatellite performance analysis in aerospace is very important. Based on the establishment of aerospace satellite visual model, the simulation of satellite visual time on 3-layer satellite networks, including GEO satellite (Geostationary Earth Orbit), IGSO (Inclined Geosynchronous Orbit) satellites and MEO (Medium Earth Orbit) satellites, has been conducted. The visual features of this satellite network have been gained. Combining with the major influencing factors of satellite clock correction error, aerospace time synchronization architecture on the basis of layering has been proposed. Furthermore, intersatellite links performance analysis is the basis for establishing aerospace layering time synchronization architecture. The 3-layer satellite networks is used as an example to simulate the variation range of distance interlayer satellites of the 3-layer satellite networks and to analyze the performance of GEO-IGSO, GEO-MEO and IGSO-MEO links in S-band and Ka-band under the preset intersatellite transmission system, link parameters, transmission loss and without regard to the error of the intersatellite pointing accuracy. The results show that at the maximum intersatellite distance, if the S-band transmission rate is in excess of 2 Mbps, when the antenna is 1 m in diameter, the transmitting power needed is about 50 W. In the Ka-band, 1m antennas only need 1 W transmitting power to provide an intersatellite data transmission rate higher than 2 Mbps. The Ka-band is more favorable for improving the performance of intersatellite links of 3-layer satellite networks. Research results serves as reference for the establishment of aerospace layering time synchronization architecture based on 3-layer satellite networks.
Highlights
With the rapid development of aerospace technology, space application has taken on various forms, with satellite navigation system, space-based measurement and control, manned space flight, deep space exploration and distributed satellite system as their typical representatives
On the basis of simulation of satellite visible time and the variation range of the intersatellite link distance of the 3-layer satellite networks, this study presents a new aerospace layering time synchronization architecture, analyzes the interlayer links performance in S-band and Ka-band of the aerospace layering time synchronization architecture
It can reduce the requirements for satellite antenna and transmitting power and can improve the intersatellite data transmission rate within the 3-layer satellite networks
Summary
With the rapid development of aerospace technology, space application has taken on various forms, with satellite navigation system, space-based measurement and control, manned space flight, deep space exploration and distributed satellite system as their typical representatives. On the basis of simulation of satellite visible time and the variation range of the intersatellite link distance of the 3-layer satellite networks, this study presents a new aerospace layering time synchronization architecture, analyzes the interlayer links performance in S-band and Ka-band of the aerospace layering time synchronization architecture.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Research Journal of Applied Sciences, Engineering and Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
