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Description

Developed at JPL, GUARDIAN is a near-real-time (NRT) ionospheric monitoring software (Martire et al.). Its main products are NRT total electronic content (TEC) time series, allowing users to explore ionospheric TEC perturbations due to natural and anthropogenic events on Earth. The NRT GUARDIAN time series are validated against well-established post-processing methods. Currently, time series are computed for more than 90 GNSS ground stations distributed around the Pacific Ring of Fire, which monitor the four main GNSS constellations (GPS, Galileo, BDS, and GLONASS).

Product Summary

Platforms
GROUND STATIONS,
Galileo
Instruments
GNSS RECEIVER
Spatial Extent
N: 90 S: -90 E: 180 W: -180
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2022-09-01
Data Partner
Crustal Dynamics Data Information System, Geodesy and Geophysics Laboratory, Earth Sciences Division, Sciences and Exploration Directorate, Goddard Space Flight Center, NASA (CDDIS)
Concept ID
c2792598543-cddis
Data State
ACTIVE
Processing Level
2
Published

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

JPL Global Differential GPS (GDGPS) System. (2023). Ground-Based Global Navigation Satellite System (GNSS) Guardian near-real-time Ionospheric Total Electron Count (5-second sampling, 24-hour files) from NASA CDDIS [Data set]. NASA Crustal Dynamics Data Information System. https://doi.org/10.5067/GNSS/GUARDIAN_IONOTEC_001 Date Accessed: 2025-06-18

Additional Citation

NASA Jet Propulsion Laboratory, GUARDIAN Near-Real-Time Ionospheric Total Electron Content product, Greenbelt, MD, USA:NASA Crustal Dynamics Data Information System (CDDIS), Accessed [[enter user data access date]] at doi:10.5067/GNSS/guardian_ionotec_001.

File Naming Convention

YYYY/DDD/SITE_YYMMDD.CSV

Documents

GENERAL DOCUMENTATION URL for more information about GUARDIAN TEC observation data

Learning Resources

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