Year-end Sale % OFF 
Abstract
Very long baseline interferometry (VLBI) is widely used for astronomical observations and navigation of deep space receivers. To solve the problems of the downlink signal being excessively weak to be received and the excessively large acquisition time, a new VLBI measurement method based on the uplink signal is proposed. Deep space ground stations can provide radio measurement signals for deep space spacecraft via the uplink. The range, Doppler and VLBI can be determined by the spacecraft through signals from multiple ground stations. In this manner, a higher signal to noise ratio (SNR) can be obtained. This study involves the development of a prompt acquisition algorithm for high dynamic deep space signals. Furthermore, the measurement and tracking of the phases of multiple VLBI stations by deep space receiver employing the uplink are analyzed. The use of the algorithms reduce the acquisition time for deep space receiver, and high precision results can be obtained for the VLBI measurement. Compared with the traditional VLBI method, the ranging error on the same distance is effectively improved, and the angle measurement accuracy is better than delta differential one way ranging ( $\Delta $ DOR). Because multiple spacecraft are not needed, there are fewer limitations than same beam interferometry (SBI).
Highlights
Very long baseline interferometry (VLBI) has received considerable attention in the deep space communication domain due to its high resolution with a long baseline
This paper presents a new VLBI method based on the uplink signal
If the signal exhibits a deviation in the orbit extrapolation, and the random deviation between the signal and carrier phase within 5 m every 0.5 s is considered, the tracking loop results are as shown in the Figs. 6 and 7
Summary
Very long baseline interferometry (VLBI) has received considerable attention in the deep space communication domain due to its high resolution with a long baseline. A VLBI system can be used to obtain the distance, Doppler and angle of deep space spacecraft [1]. If the system get the ranging results, the local stations can locate the spacecraft as long as the angle information of the spacecraft is obtained by VLBI. The measurement signal is used to determine the distance, Doppler and angle in the spacecraft This method involves two advantages: First, the signal power of the ground deep space station is higher than that of the spacecraft by approximately 20 dB. At last, compared with the traditional VLBI method, the ranging error on the same distance is effectively improved, and the angle measurement accuracy is higher than DOR.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
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 callDisclaimer: 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.
