Ocean Surface Current Inversion With Anchored Floating High-Frequency Radar: Yaw Compensation

Yi, Xianzhou; Wu, Xiongbin; Yue, Xianchang; Zhang, Lan; Chen, Zhangyou; Wan, Bin

doi:10.1109/joe.2020.3028126

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…Pitch and roll have similar characteristics, and both change quickly with small oscillation amplitude. These characteristics are identical to the measured rotation data [6].…”

Section: Simulation Conditionssupporting

confidence: 79%

“…Simulation conditions are the same as in our previous work [6]. The working frequency is 13.15 MHz and the sweep period is 0.5 second.…”

Section: Simulation Conditionsmentioning

confidence: 99%

“…Platform rotation plays a dominant role in azimuth spectrum modulation. Previous investigation summarizes the characteristics of three degree-of-freedom rotations in the application scenario of unstable floating platforms [6]: 1) Pitch and roll are interchangeable, and their motion is manifested as small amplitude oscillation motion near the horizontal plane. 2) The yaw is a slow, irregular motion, and its range of change can cover the whole possible yaw angle of 360 degrees.…”

Section: Introductionmentioning

confidence: 99%

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Three DOF Rotation Compensation in Floating HFSWR for Ocean Current Inversion

2024

J. Phys.: Conf. Ser.

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High-frequency surface wave radar (HFSWR) has been widely used for ocean surface current inversion. Floating this radar can realize the ocean surface inversion among large areas far away from the coastline. However, six degree-of-freedom (DOF) movements will set the barrier for the ocean current inversion on its radial velocity estimation and direction of arrival estimation. Among these movements, three DOF rotations can cause both Doppler modulation and azimuth modulation while three DOF translations only cause Doppler modulation which is dependent on the arrival direction of echoes. Hence, the analysis and compensation for three DOF rotations are first to be solved. In this paper, we analyse the Doppler modulation and azimuth modulation of three DOF rotations and further develop the global adaptive beamforming method to compensate for these rotations. Adaptive beamforming is used to compensate for rotations to make the real-time beams fixed to the ground when the platform is rotating. Simulations indicate that the global adaptive beamforming can perfectly compensate for the reasonable rotations, among which the yaw rotation is the dominant factor for both Doppler spectrum modulation and azimuth modulation. The rotation compensation using global adaptive beamforming can greatly improve the precision of ocean surface inversion.

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“…Pitch and roll have similar characteristics, and both change quickly with small oscillation amplitude. These characteristics are identical to the measured rotation data [6].…”

Section: Simulation Conditionssupporting

confidence: 79%

“…Simulation conditions are the same as in our previous work [6]. The working frequency is 13.15 MHz and the sweep period is 0.5 second.…”

Section: Simulation Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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