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SAR satellite data from domestic PIESAT-1 interferometric reconstruction： DEM accuracy verification and analysis

  • role： First author第一作者
  • Affiliation：

    College of Geological Engineering and Surveying and Mapping, Chang'an University, Xi'an 710054, China

  • Email：shuangcheng369@chd.edu.cn
  • Introduction：张双成，研究方向为卫星导航与遥感、星载激光雷达、GNSS与InSAR灾害监测等。E-mail： shuangcheng369@chd.edu.cn
ZHANG Shuangcheng1,  
  • role： Corresponding author通信作者
  • Affiliation：

    College of Geological Engineering and Surveying and Mapping, Chang'an University, Xi'an 710054, China

  • Email：wangminghui@chd.edu.cn
  • Introduction：王铭辉，研究方向为星载激光雷达测高、InSAR用于DEM提取等。E-mail： wangminghui@chd.edu.cn
WANG Minghui1*,  
  • Affiliation：

    Piesat Information Technology Co., Ltd, Beijing 100195, China

YANG Na2,  
  • Affiliation：

    Piesat Information Technology Co., Ltd, Beijing 100195, China

LU Jufeng2,  
  • Affiliation：

    College of Geological Engineering and Surveying and Mapping, Chang'an University, Xi'an 710054, China

WANG Jie1,  
  • Affiliation：

    College of Geological Engineering and Surveying and Mapping, Chang'an University, Xi'an 710054, China

HE Xiaoning1,  
  • Affiliation：

    College of Geological Engineering and Surveying and Mapping, Chang'an University, Xi'an 710054, China

YU Wenqiang1

resumen

El 30 de marzo de 2023, la compañía china de espacio comercial Gran Información Tecnología del Espacio logró lanzar con éxito el primer satélite (PIESAT-1) que inyecta una nueva vitalidad en el desarrollo de los satélites SAR locales, como el primer satélite de la constelación Nuwa, tiene una cartografía topográfica de alta precisión, imágenes de banda ancha y monitoreo de deformaciones de alta precisión. Sin embargo, hay pocas investigaciones relacionadas con el satélite, es urgente explorar su capacidad de cartografía real. En este artículo, una tecnología DEM basada en el proceso InSAR se ajustó según la configuración única de los satélites 1 principal + 3 satélites auxiliares PIESAT-1. En primer lugar, se eligieron tres tipos especiales de relieve: montañas, colinas y llanuras, combinando la interferometría de única vista (L1B) obtenida durante las pruebas en órbita del satélite PIESAT-1, se produjo un DEM utilizando la tecnología InSAR y se probó con los puntos de control ICESat-2 y DEM Copernicus. Los resultados mostraron que la precisión vertical del producto DEM de PIESAT-1 superó al del producto DEM de Copernicus bajo los tres tipos de relieve, con valores RMSE respectivamente de 4,8727 m, 7,8329 m, 0,9857 m; al mismo tiempo, el producto DEM de PIESAT-1 superó al producto DEM de Copernicus en cuanto a resolución espacial, permitiendo describir con mayor claridad los detalles del relieve; en este estudio también se tuvo en cuenta el impacto de la vegetación en la precisión de los productos DEM, en regiones con una densa vegetación, los errores causados por la vegetación no pueden ser ignorados. Los experimentos realizados en este artículo muestran que el complejo InSAR de PIESAT-1 tiene enormes ventajas en cuanto a resolución espacial, eficiencia cartográfica y precisión de medición en comparación con otros productos DEM, lo que constituye una referencia importante para la aplicación comercial de la constelación Nuwa.

palabra clave

PIESAT-1;Satellite-based InSAR terrain mapping;ICESat-2 control points;Multi-baseline phase unwrapping;DEM accuracy validation;Vegetation impacts

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