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Main Title: Operational multi-GNSS global ionosphere maps at GFZ derived from uncombined code and phase observations
Author(s): Brack, Andreas
Männel, Benjamin
Wickert, Jens
Schuh, Harald
Type: Article
Abstract: Global navigation satellite system (GNSS) networks with multi-frequency data can be used to monitor the activity of the Earth's ionosphere and to generate global maps of the vertical total electron content (VTEC). This article introduces and evaluates operational GFZ VTEC maps. The processing is based on a rigorous least squares approach using uncombined code and phase observations, and does not entail leveling techniques. A single-layer model with a spherical harmonic VTEC representation is used. The solutions are generated in a daily post-processing mode with GPS, GLONASS, and Galileo data, and are provided for the period since the beginning of 2000. A comparison of the GFZ VTEC maps with the final combined International GNSS Service (IGS) product shows a high consistency with the solutions of the IGS analysis centers. A validation with about four years of Jason-3 altimetry-derived VTEC data is provided, in which the GFZ solution has the smallest bias of 1.2 TEC units compared to the solutions of the IGS analysis centers, and with 3.0 TEC units one of the smallest standard deviations.
Subject(s): multi-GNSS
total electron content
global ionosphere map
Issue Date: 16-Sep-2021
Date Available: 12-Nov-2021
Language Code: en
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Journal Title: Radio Science
Publisher: Wiley
Volume: 56
Issue: 10
Article Number: e2021RS007337
Publisher DOI: 10.1029/2021RS007337
EISSN: 1944-799X
ISSN: 0048-6604
TU Affiliation(s): Fak. 6 Planen Bauen Umwelt » Inst. Geodäsie und Geoinformationstechnik » FG Satellitengeodäsie
Appears in Collections:Technische Universität Berlin » Publications

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