Abstract
The ionosphere and radio frequency interference (RFI) make low frequency radio observation on Earth difficult. Lunar orbit is an ideal site for making low frequency observations, to probe the redshifted global 21cm signal for understanding the Cosmic Dawn and Epoch of Reionization. We present a global spectrum measuring instrument specially designed for deploying on lunar orbit. The instrument consists of an electrically small frequency-independent antenna and a differential two-way cross correlation receiver. The system can make real-time vector network measurement for the antenna and receiver, and it makes absolute calibration and relative calibration using the noise wave parameter calculation. A prototype has undergone ground test in Xinjiang. Some preliminary analysis of the system performance and test data are presented, which verified the feasibility of system design.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
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.