Assessment of GRAS Ionospheric Measurements for Ionospheric Model Assimilation

We conducted a study to assess the GNSS (Global Navigation Satellite System) Receiver for Atmospheric Sounding (GRAS) ionospheric data quality by processing Radio Occultation (RO) observations of ionospheric products. The main objective of the study is to validate ionospheric data generated at EUMET...

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Bibliographic Details
Published in:Remote sensing (Basel, Switzerland) Switzerland), 2023-06, Vol.15 (12), p.3129
Main Authors: Hoque, M. M., Prol, F. S., Hernandez-Pajares, M., Notarpietro, R., Yuan, L., Olivares-Pulido, G., Graffigna, V., Von Engeln, A., Marquardt, C.
Format: Article
Language:English
Subjects:
Altitude
Artificial satellites
Atmospheric sounding
bending angle
Communications equipment
Data assimilation
Datasets
Earth orbits
Electron density profiles
Electrons
Global navigation satellite system
GNSS
GRAS ionospheric measurements
Information management
Ionosphere
Ionospheric research
ionospheric scintillations
Low earth orbits
Meteorological satellites
Physical instruments
Radio occultation
Receivers & amplifiers
Remote sensing
Satellite observation
Satellites
Total Electron Content
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Summary:We conducted a study to assess the GNSS (Global Navigation Satellite System) Receiver for Atmospheric Sounding (GRAS) ionospheric data quality by processing Radio Occultation (RO) observations of ionospheric products. The main objective of the study is to validate ionospheric data generated at EUMETSAT, such as ionospheric bending angle profiles, amplitude and phase scintillations, topside Total Electron Content (TEC) from MetOp-A GRAS instrument as well as generating and validating new ionospheric products derived from GRAS RO observations such as the TEC, rate of TEC and vertical electron density profiles. The assessment is conducted by comparing and evaluating the systematic differences between similar products from other Low Earth Orbit (LEO) satellite missions or from ground-based ionospheric measurements. The study confirms that the GNSS topside and RO observations recorded by the GRAS instrument onboard MetOp satellites are of good quality and are a valuable source of data for ionospheric research.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs15123129