System Calibration Including Time Delay Estimation for GNSS/INS-Assisted Pushbroom Scanners Onboard UAV Platforms

IF 1 4区地球科学 Q4 GEOGRAPHY, PHYSICAL

Photogrammetric Engineering and Remote Sensing Pub Date : 2021-10-01 DOI:10.14358/pers.20-00084r3

Lisa M. LaForest, T. Zhou, S. Hasheminasab, A. Habib

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引用次数: 0

Abstract

Unmanned aerial vehicles (UAVs ) equipped with imaging sensors and integrated global navigation satellite system/inertial navigation system (GNSS/INS ) units are used for numerous applications. Deriving reliable 3D coordinates from such UAVs is contingent on accurate geometric calibration, which encompasses the estimation of mounting parameters and synchronization errors. Through a rigorous impact analysis of such systematic errors, this article proposes a direct approach for spatial and temporal calibration (estimating system parameters through a bundle adjustment procedure) of a GNSS/INS -assisted pushbroom scanner onboard a UAV platform. The calibration results show that the horizontal and vertical accuracies are within the ground sampling distance of the sensor. Unlike for frame camera systems, this article also shows that the indirect approach is not a feasible solution for pushbroom scanners due to their limited ability for decoupling system parameters. This finding provides further support that the direct approach is recommended for spatial and temporal calibration of UAV pushbroom scanner systems.

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无人机平台上GNSS/ ins辅助推扫扫描仪的系统校准包括时延估计

配备成像传感器和集成全球导航卫星系统/惯性导航系统(GNSS/INS)单元的无人驾驶飞行器(uav)被用于许多应用。从这种无人机获得可靠的三维坐标取决于精确的几何校准，其中包括安装参数和同步误差的估计。通过对此类系统误差的严格影响分析，本文提出了一种直接的无人机平台上GNSS/INS辅助推扫扫描仪时空定标方法(通过束平差过程估计系统参数)。标定结果表明，水平和垂直精度都在传感器的地面采样距离内。与框架相机系统不同，本文还表明，由于推扫帚扫描仪解耦系统参数的能力有限，间接方法不是可行的解决方案。这一发现进一步支持了直接方法被推荐用于无人机推扫扫描仪系统的时空校准。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Photogrammetric Engineering and Remote Sensing 地学-成像科学与照相技术

CiteScore

1.70

自引率

15.40%

发文量

审稿时长

9 months

期刊介绍： Photogrammetric Engineering & Remote Sensing commonly referred to as PE&RS, is the official journal of imaging and geospatial information science and technology. Included in the journal on a regular basis are highlight articles such as the popular columns “Grids & Datums” and “Mapping Matters” and peer reviewed technical papers. We publish thousands of documents, reports, codes, and informational articles in and about the industries relating to Geospatial Sciences, Remote Sensing, Photogrammetry and other imaging sciences.