Identification

Title

3-D ionospheric imaging over the South American region with a new TEC-based ionospheric data assimilation system (TIDAS-SA)

Abstract

This study has developed a new TEC-based ionospheric data assimilation system for 3-D regional ionospheric imaging over the South American sector (TIDAS-SA) (45 degrees S-15 degrees N, 35 degrees-85 degrees W, and 100-800 km). The TIDAS-SA data assimilation system utilizes a hybrid Ensemble-Variational approach to incorporate a diverse set of ionospheric data sources, including dense ground-based Global Navigation Satellite System (GNSS) line-of-sight Total Electron Content (TEC) data, radio occultation data from the Constellation Observing System for Meteorology, Ionosphere, and Climate-2 (COSMIC-2), and altimeter TEC data from the JASON-3 satellite. TIDAS-SA can produce a reanalyzed three-dimensional (3-D) electron density spatial variation with a high time cadence, yielding spatial-temporal resolution of 1 degrees (latitude) x 1 degrees (longitude) x 20 km (altitude) x 5 min. This allows us to reconstruct and study the 3-D ionospheric morphology with multi-scale structures. The performance of the data assimilation system is validated against independent ionosonde and in situ measurements through an experiment for a strong geomagnetic storm event on 03-04 November 2021. The results demonstrate that TIDAS-SA can provide detailed and altitude-resolved information that accurately characterizes the storm-time ionospheric disturbances in vertical and horizontal domains over the equatorial and low-latitude regions of South America.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.org/ark:/85065/d7qf8z16

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2024-02-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact