Method of multi-channel calibration for digital array radar

Li, Weixing; Lin, Jianzhi; Wang, Weihua; Wang, Yasen; Chen, Zengping

doi:10.1109/eurad.2015.7346355

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…These factors can result in inconsistent amplitude and phase among different channels, leading to distorted synthesized transmit pulse beams. This distortion can compromise the quality of digital beam synthesis and subsequently impact the accuracy of measurement results [26][27][28].…”

Section: Amplitude and Phase Correctionmentioning

confidence: 99%

Analysis of Onboard Verification Flight Test for the Salinity Satellite Scatterometer

Liu,

Wang,

Yun

et al. 2023

Sensors

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The upcoming Salinity Satellite, scheduled for launch in 2024, will feature the world’s first phased array radar scatterometer. To validate its capability in measuring ocean surface backscatter coefficients, this paper conducts an in-depth analysis of the onboard verification flight test for the Salinity Satellite scatterometer. This paper provides a detailed introduction to the system design of the Salinity Satellite scatterometer, which utilizes phased array radar technology and digital beamforming techniques to achieve accurate measurements of sea surface scattering characteristics. The paper elaborates on the derivation of backscatter coefficients, system calibration, and phase amplitude correction for the phased array scatterometer. Furthermore, it describes the process of the onboard calibration flight test. By analyzing internal noise signals, onboard calibration signals, and external noise signals, the stability and reliability of the scatterometer system are validated. The experiment covers both land and ocean observations, with a particular focus on complex sea surface conditions in nearshore areas. Through the precise analysis of backscatter coefficients, the paper successfully distinguishes the different backscatter coefficient characteristics between ocean and land. The research results effectively demonstrate the feasibility of the Salinity Satellite scatterometer for measuring backscatter coefficients in a phased array configuration, as well as its outstanding performance in complex marine environments.

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Section: Amplitude and Phase Correctionmentioning

confidence: 99%

Analysis of Onboard Verification Flight Test for the Salinity Satellite Scatterometer

Liu,

Wang,

Yun

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…En[Schoor_08] se estudian diferentes algoritmos de calibración activa y de calibración activa local aplicados a un radar de automoción. Se concluye que en ese caso se obtienen mejores resultados con la calibración local que con los algoritmos de calibración activa.En[Li_15] se plantea una calibración en las bandas S y L con resultados experimentales donde solo se tienen en cuenta las diferencias de amplitud y fase. En[Eberhardt_16] se analiza el modelo de señal para añadir el efecto de la directividad de las antenas del array, de manera que no a todas las antenas les llega la misma potencia debido a la distancia entre ellas, por lo que también añade ese efecto "de sombra" en el modelo de señal.…”

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