Study of Ionospheric Bending Angle and Scintillation Profiles Derived by GNSS Radio-Occultation with MetOp-A Satellite

Prol, Fabricio dos Santos; Hoque, Mainul; Hernández‐Pajares, Manuel; Yuan, Liangliang; Olivares‐Pulido, Germán; Engeln, Axel von; Marquardt, Christian; Notarpietro, Riccardo

doi:10.3390/rs15061663

Cited by 6 publications

(8 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A comprehensive quality assessment of the bending angle, amplitude, and phase scintillation profiles generated at EUMETSAT is conducted by comparing MetOp-A data against independent measurements. This analysis has been recently summarized and published [9], and a details analysis of the results is out of the scope of the current paper. A comprehensive quality assessment of the bending angle, amplitude, and phase scintillation profiles generated at EUMETSAT is conducted by comparing MetOp-A data against independent measurements.…”

Section: Assessment Of Bending Angle Profilesmentioning

confidence: 99%

Section: Assessment Of Bending Angle Profilesmentioning

confidence: 99%

“…It is noted that the MetOp-A satellite passes the Northern middle latitudes at around 6:00 and 18:00 local time (LT) hours, where and when the sporadic E-layers (Es) are more evident [9]. A literature study shows that the mid-latitude Es is visible only during summertime (being the highest during local noon hours) ( [9] and references therein). Such scintillation occurs only at E-layer height (80-140 km).…”

Section: Assessment Of Scintillation Indices Profilesmentioning

confidence: 99%

“…It seems that COSMIC-2 shows weaker scintillation due to the favorable ray path geometry (neither meridional direction nor zonal direction rather falls between the two). For more details of the assessment results regarding the quality of MetOp-A scintillations products, we refer to [9].…”

Section: Assessment Of Scintillation Indices Profilesmentioning

confidence: 99%

See 3 more Smart Citations

Assessment of GRAS Ionospheric Measurements for Ionospheric Model Assimilation

et al. 2023

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Assessment Of Bending Angle Profilesmentioning

confidence: 99%

Section: Assessment Of Bending Angle Profilesmentioning

confidence: 99%

Section: Assessment Of Scintillation Indices Profilesmentioning

confidence: 99%

Section: Assessment Of Scintillation Indices Profilesmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of GRAS Ionospheric Measurements for Ionospheric Model Assimilation

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…Using ground-based observations alone, with their inadequate geometry for capturing vertical ionospheric structures, leads to models with limited resolution and accuracy. The addition of RO data complements ground-based measurements by enhancing vertical resolution and expanding coverage, especially in the upper layers of the ionosphere [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

IONOLAB-Fusion: Fusion of Radio Occultation into Computerized Ionospheric Tomography

Yenen,

Arikan

2024

Atmosphere

View full text Add to dashboard Cite

In this study, a 4-D, computerized ionospheric tomography algorithm, IONOLAB-Fusion, is developed to reconstruct electron density using both actual and virtual vertical and horizontal paths for all ionospheric states. The user-friendly algorithm only requires the coordinates of the region of interest and range with the desired spatio-temporal resolutions. The model ionosphere is formed using spherical voxels in a lexicographical order so that a 4-D ionosphere can be mapped to a 2-D matrix. The model matrix is formed automatically using a background ionospheric model with an optimized retrospective or near-real time manner. The singular value decomposition is applied to extract a subset of significant singular values and corresponding signal subspace basis vectors. The measurement vector is filled automatically with the optimized number of ground-based and space-based paths. The reconstruction is obtained in closed form in the least squares sense. When the performance of IONOLAB-Fusion across Europe was compared with ionosonde profiles, a 26.51% and 32.33% improvement was observed over the background ionospheric model for quiet and disturbed days, respectively. When compared with GIM-TEC, the agreement of IONOLAB-Fusion was 37.89% and 31.58% better than those achieved with the background model for quiet and disturbed days, respectively.

show abstract

Validation of Ionospheric Parameters From Electron Density Profiles of FY‐3E Satellite Using Ionosonde, GIMs, Satellite Altimetry and Other Occultations

Huang,

Chen,

Yao

et al. 2024

JGR Space Physics

View full text Add to dashboard Cite

The FengYun‐3E satellite (FY‐3E) is the first to feature the GNSS Occultation Sounder II (GNOS‐II). Occultation is effective for ionosphere detection, but data variations between FY‐3E and other techniques are inevitable due to differing instruments and methodologies. Evaluating the GNOS‐II performance against other techniques is imperative. We extract ionospheric parameters—the F2 layer peak height (hmF2), F2 layer critical frequency (foF2), and Vertical Total Electron Content (VTEC)—from FY‐3E's electron density profile. We use ionosonde, Global Ionospheric Maps (GIMs), and Satellite Altimetry (SA), along with FY‐3D and COSMIC‐2 to analyze FY‐3E's performance. Additionally, we use the International Reference Ionosphere (IRI‐2020) to normalize VTEC, eliminating systematic biases due to altitude differences. Results show that FY‐3E's foF2 has high consistency with ionosonde, while hmF2 shows larger differences. However, both foF2 and hmF2 from FY‐3E, FY‐3D, and COSMIC‐2 have comparable data quality. TEC differences between FY‐3E and GIMs are greater during equinoxes and in the daytime. Significant TEC deviations are observed, particularly in low‐latitude region affected by the Equatorial Ionization Anomaly (EIA) during the daytime, with underestimation at EIA crests and overestimation at EIA troughs and around ±40° geomagnetic latitude, a phenomenon also observed when compared to SA. FY‐3D and COSMIC‐2 exhibit similar patterns, but FY‐3E shows better consistency with GIMs and SA compared to FY‐3D. Compared to FY‐3D and FY‐3E, COSMIC‐2 has fewer overestimated profiles. Furthermore, FY‐3E performs poorly in observing ionospheric structure in the EIA region but performs well in the Weddell Sea Anomaly (WSA) region, similar to FY‐3E.

show abstract

Study of Ionospheric Bending Angle and Scintillation Profiles Derived by GNSS Radio-Occultation with MetOp-A Satellite

Cited by 6 publications

References 55 publications

Assessment of GRAS Ionospheric Measurements for Ionospheric Model Assimilation

Assessment of GRAS Ionospheric Measurements for Ionospheric Model Assimilation

IONOLAB-Fusion: Fusion of Radio Occultation into Computerized Ionospheric Tomography

Validation of Ionospheric Parameters From Electron Density Profiles of FY‐3E Satellite Using Ionosonde, GIMs, Satellite Altimetry and Other Occultations

Contact Info

Product

Resources

About