Journal of Northeastern University Natural Science ›› 2019, Vol. 40 ›› Issue (10): 1480-1486.DOI: 10.12068/j.issn.1005-3026.2019.10.020

• Resources & Civil Engineering • Previous Articles     Next Articles

Influence of Strong Geomagnetic Storms on Global GNSS Observation Signals

HE Li-ming1, ZHANG Shi-xuan1, WU Li-xin2   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China.
  • Received:2019-01-16 Revised:2019-01-16 Online:2019-10-15 Published:2019-10-10
  • Contact: ZHANG Shi-xuan
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Abstract: A method for calculating the rate of loss-of-lock(LOL)at carrier phase and pseudo-range measurements of GNSS L1 and L2 was introduced, and the impacts of different satellite elevation angles on the LOL rate were also investigated. Using global GNSS observations, the qualities of GNSS signals during two strong geomagnetic storms at the 23rd solar cycle were analyzed. The results showed that the LOL rates of L1, L2, P1 and P2 signals significantly increased during strong geomagnetic storms comparing with the quiet days. The LOL mainly occurred in the main phase and the early recovery phase of the storm. The LOL rate of L2was significantly higher than L1, and the LOL duration was longer. This means the L2 was more sensitive to geomagnetic storm than L1. The high correlation between the LOL rate and SYM-H index indicated that the abnormal increase of global LOL rate was driven by the strong geomagnetic storm. The results could provide methodological support for the assessment of signal quality of the Beidou navigation satellite system.

Key words: global navigation satellite system, geomagnetic storm, ionosphere, signal loss-of-lock, Beidou navigation satellite system

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