Journal of Geodesy ( IF 3.9 ) Pub Date : 2024-05-24 , DOI: 10.1007/s00190-024-01860-3 Léo Martire , Thomas F. Runge , Xing Meng , Siddharth Krishnamoorthy , Panagiotis Vergados , Anthony J. Mannucci , Olga P. Verkhoglyadova , Attila Komjáthy , Angelyn W. Moore , Robert F. Meyer , Byron A. Ijima , Donald W. Green
The Jet Propulsion Laboratory (JPL) develops JPL-GIM, a software for generating global ionospheric maps (GIMs) of total electron content (TEC) using measurements from multiple Global Navigation Satellite System (GNSS) constellations. Within this overview paper, we delve into the current state and the most recent enhancements of JPL-GIM. An adaptable Kalman filter provides maps with user-defined temporal and spatial resolutions, while concurrently delivering essential covariance data for uncertainty assessment. Furthermore, multiple shell models offer a versatile framework to balance accuracy and computational efficiency. We present the five operational JPL GIM products (JPLG, JPRG, JPLI, JPLD, JPRT), highlighting JPLG and JPRG, our products routinely delivered to the International GNSS Service (IGS), and introduce a new near-real-time product (JPRT). As an added demonstration of JPL-GIM’s capabilities, we present a very-high-resolution (2-minute, multi-GNSS, 1000-station) configuration to showcase JPL-GIM’s ability to resolve long-lasting effects of the 2022 Hunga Tonga-Hunga Ha’apai eruption. Validations using independent datasets confirm the accurate reproduction of ionospheric variations across all latitudinal bands.
中文翻译:
JPL-GIM 算法和产品:多 GNSS 总电子含量高速全局测绘
喷气推进实验室 (JPL) 开发了 JPL-GIM,这是一种利用多个全球导航卫星系统 (GNSS) 星座的测量结果生成总电子含量 (TEC) 的全球电离层图 (GIM) 的软件。在这篇概述论文中,我们深入研究了 JPL-GIM 的当前状态和最新增强功能。适应性强的卡尔曼滤波器提供具有用户定义的时间和空间分辨率的地图,同时提供用于不确定性评估的基本协方差数据。此外,多壳模型提供了一个通用框架来平衡准确性和计算效率。我们展示了五种可运行的 JPL GIM 产品(JPLG、JPRG、JPLI、JPLD、JPRT),重点介绍了我们定期向国际 GNSS 服务 (IGS) 提供的产品 JPLG 和 JPRG,并介绍了一种新的近实时产品 (JPRT )。作为 JPL-GIM 功能的补充演示,我们展示了超高分辨率(2 分钟、多 GNSS、1000 个站点)配置,以展示 JPL-GIM 解决 2022 年洪加汤加飓风长期影响的能力。洪加哈派火山喷发。使用独立数据集的验证确认了所有纬度带上电离层变化的准确再现。