Identification

Title

Multi-wavelength (L and S band) study of ionospheric irregularities from an anomaly crest location

Abstract

This paper reports observation of moderate to intense scintillations, at S band of Indian Regional Navigation Satellite System (IRNSS). During current solar cycle 25, these occurrences are probably being reported for the first time, from a low-latitude station Calcutta (22.58 DEG;N, 88.38 DEG;E geographic; magnetic dip 34.54 DEG;), located near the northern crest of Equatorial Ionization Anomaly. Efforts have been made to analyze irregularity dynamics at IRNSS S band, along with a comparative study at GNSS L1 to characterize occurrence and evolution of multiscale irregularity structures. Power spectral analysis technique has been applied on recorded C/N-O,N- during scintillation patches, to measure east-west zonal drift velocity. Efforts are also made to study intensity of signal perturbation at L5 frequency of IRNSS, compared to S band, when observed simultaneously, during period of ionospheric scintillation. Concurrent irregularity dynamics at L1, L5, and S band, particularly from a low-latitude station, has not been extensively reported earlier. Data is recorded during vernal equinox (February-April 2022) of current solar cycle. Results of this study show occurrence of simultaneous night-time scintillation at L1, L5, and S band. East-west zonal drift velocity of irregularity, obtained from S band observations are found to decrease with the progress of time during 20-23 LT having a maximum value of 125 m/s. At GNSS L1, hourly average value of the velocity, is observed to maximize during 20-21 LT. Simultaneous observation of scintillation effects at L5 and S band of IRNSS led to loss-of-lock at L5, while no such occurrence was noted at S band.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7ff3xbf

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

2023-07-01T00:00:00Z

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