测绘通报 ›› 2024, Vol. 0 ›› Issue (9): 151-155.doi: 10.13474/j.cnki.11-2246.2024.0927

• 技术交流 • 上一篇    下一篇

基于点目标的陆地探测一号01组图像质量评价

张一帆, 徐航, 樊文锋, 翟浩然, 梁雪莹   

  1. 自然资源部国土卫星遥感应用中心, 北京 100048
  • 收稿日期:2024-03-13 发布日期:2024-10-09
  • 通讯作者: 徐航。E-mail:hang80s@163.com
  • 作者简介:张一帆(1987—),女,硕士,工程师,主要研究方向为卫星遥感质量评价及信息系统建设。E-mail:caisefan@163.com

Image quality evaluation of Lutan-1 based on point target

ZHANG Yifan, XU Hang, FAN Wenfeng, ZHAI Haoran, LIANG Xueying   

  1. Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing 100048, China
  • Received:2024-03-13 Published:2024-10-09

摘要: 为了衡量陆地探测一号01组卫星在轨测试阶段的成像质量,使用客观的基于点目标评价指标对双星进行评价,包括空间分辨率、峰值旁瓣比和积分旁瓣比。本文选取双星在2023年3—8月的图像,基于人为布设的角反射器进行图像质量的评价。分析结果表明,陆地探测一号01组A星和B星均可以达到在轨测试中对于卫星成像指标的要求,其中距离向上的空间分辨率优于方位向,方位向上的峰值旁瓣比、积分旁瓣比优于距离向。在成像质量方面,A星优于B星;在稳定性方面,双星距离向上的评价指标更为稳定。陆地探测一号01组的数据成像质量可良好的支持卫星后续的相关应用。

关键词: 陆地探测一号, SAR图像, 图像质量评价, 点目标评价, 空间分辨率

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

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