测绘学报 ›› 2026, Vol. 55 ›› Issue (9): 1599-1611.doi: 10.11947/j.AGCS.2026.20260075

• 摄影测量学与遥感 • 上一篇    下一篇

天绘二号双基成像几何的有理函数模型研究

熊新1,2(), 靳国旺1,2(), 李佳豪1, 叶豪1, 杨乐3   

  1. 1.信息工程大学,河南 郑州 450001
    2.智能空间信息国家级重点实验室,北京 100094
    3.陆军工程大学,江苏 南京 210042
  • 收稿日期:2026-02-28 修回日期:2026-08-28 出版日期:2026-10-28 发布日期:2026-10-28
  • 通讯作者: 靳国旺 E-mail:xiongxinhbhh@163.com;guowang_jin@163.com
  • 作者简介:熊新(1991—),男,博士,讲师,研究方向为微波遥感。 E-mail:xiongxinhbhh@163.com
  • 基金资助:
    河南省自然科学基金优秀青年基金(252300421206);国家重点研发计划(2023YFB2604001);院自主科研项目

Research on rational function model for Tianhui-2 bistatic imaging geometry

Xin Xiong1,2(), Guowang Jin1,2(), Jiahao Li1, Hao Ye1, Le Yang3   

  1. 1.Information Engineering University, Zhengzhou 450001, China
    2.National Key Laboratory of Intelligent Spatial Information, Beijing 100094, China
    3.Army Engineering University, Nanjing 210042, China
  • Received:2026-02-28 Revised:2026-08-28 Online:2026-10-28 Published:2026-10-28
  • Contact: Guowang Jin E-mail:xiongxinhbhh@163.com;guowang_jin@163.com
  • About author:Xiong Xin (1991—), male, PhD, lecturer, majors in microwave remote sensing. E-mail: xiongxinhbhh@163.com
  • Supported by:
    The Natural Science Foundation for Excellent Young Scholars of Henan Province(252300421206);The National Key Research and Development Program of China(2023YFB2604001);The Independent Research Project of the School

摘要:

面向天绘二号(TH-2)卫星系统的双基干涉成像几何,构建了一种三方程有理函数模型(RFM),推导了其正向和反向解析表达式,并建立了基于最小二乘的RFM参数估计方法。该模型在传统两方程RFM基础上,嵌入干涉相位观测方程,实现了像方观测值(方位向坐标、距离向坐标、干涉相位)与大地坐标(纬度、经度、高程)之间的双向几何映射。采用6套天绘二号双基成像InSAR数据进行RFM拟合精度分析试验,结果表明本文模型能够精确拟合严格成像模型。地理编码试验进一步验证了本文模型的实用性。

关键词: 天绘二号, 双基成像, 有理函数模型, 干涉相位

Abstract:

This study investigates a three-equation rational function model (RFM) for the bistatic imaging geometry of the Tianhui-2 (TH-2) satellite system. We rigorously derive both forward and inverse RFM formulations and design the least-squares-based RFM parameter solution method. Departing from the conventional two-equation RFM, our formulation incorporates an interferometric phase equation, achieving a two-way precise mapping between image-space observations (azimuth coordinate, range coordinate, and interferometric phase) and geodetic coordinates (latitude, longitude, and height). Experimental validation is conducted using 6 independent TH-2 bistatic imaging InSAR datasets. The results the proposed three-equation RFM can accurately fit the strict imaging model. The geocoding experiments further verified the practicality of the model.

Key words: Tianhui-2, bistatic imaging, rational function model, interferometric phase

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