In-Flight Calibration of the Metop-Sg Sca Wind Scatterometer

Rostan, F.; Ulrich, Detlef; Schied, Eberhard; Heer, C.; Stergaard, A. O

doi:10.1109/igarss.2018.8517990

Cited by 1 publication

(1 citation statement)

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“…In practical applications, some factors in the system, such as jitter, temperature drift, etc., may cause the gain of the received signal or the transmitted signal to fluctuate, thus affecting the accuracy of the measurement results [20,21]. To mitigate the effects of channel-to-channel gain imbalances and cross-talk, and to obtain the true target scattering matrix, phased array scatterometers employ a relative calibration approach for system calibration [22][23][24]. During flight or observation, the phased array scatterometer switches to internal calibration mode.…”

Section: System Calibration and Amplitude And Phase Correction 41 Sys...mentioning

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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