Analyses for the Mechanism of Solar Radio Burst Interfering Satellite Navigation Signal and Influence Presentation

Solar radio bursts are a potential interference factor in navigation systems. From the navigation signal model is derived in this paper, the paper analyzes the solar radio burst interference mechanism of navigation signal, the interference effects exist three effects, namely with the solar radio burst flux, receiver performance, and the Angle of the Sun-navigation antenna height, synthesize the proposed the influence of solar radio burst interfere with communication navigation equation. It is concluded that the total integrated power of the solar burst flow in the navigation communication frequency band is positively correlated with the decrease of the signal to noise ratio of the communication signal, and is affected by the modulation of the height Angle of the sun-antenna and the effective area of the antenna, and has a convolution relationship with the response function of the loop filter of the navigation receiver. Then, this paper further analyzed the GPS lock-out signal during the solar radio bursts on 28 October 2003, 6 December 2006 and 4 November 2015. It is found that the loss-rate of different receivers at the same site is different in the same event (receiver performances effect). The loss-of-lock rate of the same receiver at different latitudes in the same event is different (Sun-antenna height Angle effect). In addition, under the condition of non-uniform spectrum of L-band (1～2 GHz) solar radio bursts in the same event (solar radio burst flow distribution effect), the decrease of signal to noise ratio of L1 and L2 band communication signals is also different. Therefore, the analytical correctness of the above influence equation is verified by the observation characterization of the above three events.