Image quality evaluation of Lutan-1 based on point target

doi:10.13474/j.cnki.11-2246.2024.0927

Abstract

Abstract: In order to measure the imaging quality of Lutan-1 satellites in the phase of orbital detection, objective point target-based evaluation indicators are used to evaluate the satellites, including spatial resolution, peak side lobe ratio and integrated side lobe ratio. The images of satellites from March to August 2023 are selected to evaluate the image quality based on artificially arranged corner reflectors. The analysis results show that both LT-1 A and LT-1 B can meet the requirements of satellite imaging indicators in orbital detection, the spatial resolution in the range direction is better than in the azimuth direction, the peak side lobe ratio and integrated side lobe ratio in the azimuth direction is better than the range direction. In the imaging quality, LT-1 A is better than LT-1 B. In the stability, the indicators of satellites in the range direction are more stable. The imaging quality of LT-1 data can well support subsequent related applications of the satellites.

Key words: Lutan-1, SAR image, image quality evaluation, point target evaluation, spatial resolution

CLC Number:

ZHANG Yifan, XU Hang, FAN Wenfeng, ZHAI Haoran, LIANG Xueying. Image quality evaluation of Lutan-1 based on point target[J]. Bulletin of Surveying and Mapping, 2024, 0(9): 151-155.

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