INFLUENCE OF ACOUSTIC-GRAVITY WAVES ON PROPAGATION OF LORAN-C

Ying Zheng

Abstract:	After improving Type Po20 Loran-C Receiver, we obtained an output of phase difference with 1 is full scale and therefore increased the resolution rate of phase difference AP between our clock and LC signals. When the weather changes we often record the obvious variation of ap. Sometimes, the period of the variation was about 9 min and the amount of the variation of AP was up to several hundred ns, and the attenuation of amplitude M of LC groundwaves was in excess of 8 db. After making a comparison between some results, we realize that the AP and M of LC groundwaves were affected by acousticgravity waves generated by cold (warm) currents or typhoons, and that the LC sky waves were affected by more acoustic-gravity waves with longer periods.
Published in:	Proceedings of the 19th Annual Precise Time and Time Interval Systems and Applications Meeting December 1 - 3, 1989 Sheraton Hotel Redondo Beach, California
Pages:	149 - 154
Cite this article:	Zheng, Ying, "INFLUENCE OF ACOUSTIC-GRAVITY WAVES ON PROPAGATION OF LORAN-C," Proceedings of the 19th Annual Precise Time and Time Interval Systems and Applications Meeting, Redondo Beach, California, December 1987, pp. 149-154.
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