IAG JWG 4.3.1 Real-time Ionosphere Monitoring and Modeling: Status during 2019-2022
- 1Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China
- *A full list of authors appears at the end of the abstract
For many decades the International GNSS Service (IGS) is delivering high-precision ionospheric products for various scientific applications. The Ionosphere Associated Analysis Centers (IAAC), for instance, provide routinely maps of the Vertical Total Electron Content (VTEC), i.e. the integral of the electron density along the height to correct measurements for ionospheric influences, usually disseminated with latencies of days to weeks and based on post-processed observations. Precise GNSS applications, however, such as autonomous driving or precision farming, require the use of high-precision and high-resolution ionospheric correction models in real-time. Hence, the Joint Working Group 4.3.1 “Real-time Ionosphere Monitoring and Modeling” was launched together with IGS and Global Geodetic Observing System (GGOS) within IAG sub-commission 4.3.
The structure and objectives of IAG JWG 4.3.1 during 2019-2023 are described first. Progress of the JWG during 2019-2022, are then presented in detail, which can be summarized as follows:
- Discussion of different time scales for designing / delivering different types of IGS ionospheric State Space Representation (SSR) messages.
- Finalization of global ionosphere corrections in IGS RT-WG proposed SSR data format, which had been released in early October 2020 (Phase 1).
- Continue working on the IGS experimental RT-combination of CAS, CNES, UPC and WHU RT-GIMs, and routine generation of IGS RT-GIMs from two ACs.
- Discussion on delivering ionospheric corrections using alternative base functions (e.g. B-Splines) together with accuracy information or quality indicator.
- Using DORIS near-real-time data to validate the quality real-time GNSS generated ionospheric models.
- Working with IRI-WG on the assimilation of IGS RT-GIM into IRI model.
Finally, the next-step work of JWG 4.3.1 in the generation, comparison, combination and dissemination of experimental two- and/or three-dimensional ionospheric information in support of real-time ionospheric monitoring and associated scientific applications are given.
Zishen Li(1*), Ningbo Wang(1), Yunbin Yuan(2), Manuel Hernández-Pajares(3), Alexis Blot(4) Andrzej Krankowski(5), Andre Hauschild(6), Alberto Garcia-Rigo(3), Andreas Goss(7), Attila Komjathy(8), Cheng Wang(9), Eren Erdogan(7), German Olivares(10), Kenji Nakayama(11), Libo Liu(12), Nicolas Bergeot(13), Qile Zhao(14), Raul Orús(15), Reza Ghoddousi-Fard(16), Wookyoung Lee(17), Xingliang Huo(2), Heng Yang(3), Zhizhao Liu(18) (1) AIR/CAS, China; (2) IGG-Wuhan/CAS; (3) UPC-IonSAT, Spain; (4) CNES, France; (5) UWM, Poland; (6) DLR/GSOC, Germany; (7) TUM/DGFI, Germany; (8) NASA/JPL, USA; (9) BUAA, China; (10) GA, Australia; (11) NICT, Japan; (12) IGG-Beijing/CAS, China; (13) ROB, Belgium; (14) WHU, China; (15) ESA/ESTEC, Netherland; (16) NRCan, Canada; (17) KASI, South Korea; (18) PolyU, China Hongkong
How to cite: Li, Z. and the IAG 4.3.1 Working Group Member: IAG JWG 4.3.1 Real-time Ionosphere Monitoring and Modeling: Status during 2019-2022, 2nd Symposium of IAG Commission 4 “Positioning and Applications”, Potsdam, Germany, 5–8 Sep 2022, iag-comm4-2022-12, https://doi.org/10.5194/iag-comm4-2022-12, 2022.
