The new CAS-DIS digital ionosonde

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Wang Shun
Chen Ziwei
Zhang Feng
Fang Guangyou


A high quality digital ionosonde called the Chinese Academy of Sciences digital ionosonde (CAS-DIS) has been developed for investigations of the ionosphere. Two important features are used for the CAS-DIS; first, the technique of analog down-conversion has been replaced by the new approach of digital down-conversion technology. Secondly, to solve the problem of large instantaneous receiving bandwidth in digital receivers, an analog narrowband tracking filter is used for the CAS-DIS. The center frequency of the filter tracks the carrier frequency transmitted in real-time, to ensure that the frequency components are filtered out of the effective bandwidth. This report describes the system architecture of the CAS-DIS, its main features, and its test results for ionosphere detection.


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How to Cite
Shun W, Ziwei C, Feng Z, Guangyou F. The new CAS-DIS digital ionosonde. Ann. Geophys. [Internet]. 2013Apr.19 [cited 2021Oct.22];56(1):R0107. Available from:
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