Analysis of Doppler spectrum of a spaceborne Doppler scatterometer using an echoed signal simulation model

Zhang, Jingyu; Dong, Xiaolong; Zhu, Daoben

doi:10.1080/01431161.2023.2240510

Cited by 2 publications

(3 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Section 3, we established the correction method of platform velocity. From Equations (33) and (34), it can be seen that the incidence angle, azimuth angle, and satellite platform velocity affect the correction accuracy. Next, we further analyze the correction accuracy.…”

Section: Discussionmentioning

confidence: 99%

“…σ 0 (i) is the backscattering coefficient related to the ocean surface roughness and slope. Note that the influence of the modulation of backscatter coefficient in Equation ( 9) on the radial velocity measurement was analyzed in our previous work [33]. Therefore, we do not consider the influence of backscattering coefficient modulation in the analysis of the platform velocity correction in this research.…”

Section: The Echoed Signal Simulation Modelmentioning

confidence: 98%

“…The echoed signal simulation model was proposed in our previous work [33]. We assume that the spaceborne rotating pencil-beam Doppler scatterometer rotates clockwise.…”

Section: The Echoed Signal Simulation Modelmentioning

confidence: 99%

See 2 more Smart Citations

Satellite Velocity Correction Method of Ocean Current Retrieval for a Spaceborne Doppler Scatterometer

Zhang,

Dong,

Zhu

2023

Remote Sensing

Self Cite

View full text Add to dashboard Cite

For a spaceborne pencil-beam rotating Doppler scatterometer, its precision in measuring the ocean surface motion depends on the Doppler centroid of the received signals. The Doppler centroid is determined by the relative motion between the scatterometer and the ocean surface. This relative motion includes contributions from satellite velocity, the phase velocity of resonant Bragg waves, the orbital motions of ocean waves, and the ocean surface current. Subtracting the contribution of the satellite platform velocity from the complex Doppler information is important for the application of a spaceborne Doppler scatterometer in ocean surface current retrieval. In this research, we propose a method for the platform velocity correction influenced by the Doppler centroid offset and analyze the accuracy of this correction method. The method is based on the echoed signal model of a Doppler scatterometer. Our results show that the offset could lead to a measurement offset of up to 0.02 m/s when the beam width was 0.3°. For a 0.6° beam width, the maximum offset was 0.07 m/s. Thus, with the high accuracy of the current spaceborne sensors’ measurement, the offset can be accurately eliminated. In future applications and data processing algorithms, this effect should be considered.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: The Echoed Signal Simulation Modelmentioning

confidence: 98%