|
| Effects of Ionosphere on High-frequency Direction Finding Systems |
| Received:March 20, 2017 Revised:July 15, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2017.07.009 |
| KeyWord:ionosphere hf direction finding path deviation effect wave-interference effect traveling wave disturbance (TID) systemic tilt |
| Author | Institution |
| SUN Feng-juan |
CETC No. 22 Research Institute, Qingdao , China |
| LIU Wen |
CETC No. 22 Research Institute, Qingdao , China |
| LI Tie-cheng |
CETC No. 22 Research Institute, Qingdao , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To study effects of ionosphere on high-frequency direction finding systems. Methods The basic characteristics of ionosphere were firstly introduced, the formation mechanism of path deviation effect, wave-interference effect and its influences on HF direction finding were analyzed. Results With the ionospheric long-term prediction model, short-term prediction algorithm or ionospheric real-time sounding data, the error caused by ionospheric system tilt could be compensated. Traveling wave disturbances could not be predicted and the error caused by traveling wave disturbances could only be corrected based on the observed results of traveling wave disturbance. Time smoothing could suppress the wave interference error. Conclusion The basic way to improve the performance of HF direction finding system is to provide the ionospheric sounding equipment, to obtain the information of the ionospheric state in the coverage area and to carry out the compensation of the propagation effect. |
| Close |
|
|
|