Response of the 30mhz and the Fluxgate Magnetometer at Maitri to Onset of Geomagnetic Disturbance.

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Brief Description (Abstract):

An attempt has been made to understand the physical processes in the auroral ionosphere over MAITRI (geog. coord. 70.75o S, 52.8?E) and their response to geomagnetic disturbances. After observing the signatures of auroral ionospheric current systems on the ground magnetograms of fluxgate magnetometer, we tried to correlate these with the auroral absorption events recorded by a 30 MHz Riometer. The radio noise absorption is caused by the charged, particle precipitation in the auroral ionosphere i.e. by the secondary ionisation created in the lower ionosphere over Maitri. While passing through the region of enhanced electron density the cosmic radio noise suffers increased absorption resulting in a decrease in signal strength received by Riometer on the ground absorption events are categorized into the dawn, daytime, dusk and nighttime events and corresponding variations in the ionospheric current systems are presented here.

Status: Completed

Purpose: The Indian Institute of Geomagnetism has been operating Fluxgate Magnetometers at MAITRI (MAI with geog. coord ?0.75o S, 11.75o E, geomagnetic 62.8o S, 52.8o E coord) over the past two decades. These Fluxgate Magnetometers (FM) have been recording variations in the three orthogonal components of the surface geomagnetic field, X (north- south direction), Y (east-west) and Z (vertical), in other words known as Daily Variations (DV). A Riometer (Radio Ionospheric Opacity Meter) recording the radio signal strength at ground of the natural omnidirectional 30 MHz cosmic radio noise from the Universe, was added as an experiment in 1995, but due to faulty earthing at MAI, could not yield good data for a couple of years. With the rectification of the earthing problem, the data from the Riometer (RIO) improved considerably in 1997, and by 1998 attained great reliability.

Presentation Format: Documentdigital

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Supplemental Information:

TableDigital

Keyword(s): Earth Science-Solid Earth,

Place/Location(s): Maitri, Antarctic,

Project: Response of the 30mhz and the Fluxgate Magnetometer at Maitri to Onset of Geomagnetic Disturbance,

Topic Category(s): GeoScientific Information,

Date(s): 2020-09-21 (Creation),

Resource Contact(s):
1. Name : Dr. P Elango
    Role : PrincipalInvestigator
    Phone : 8322525515
    E-Mail : ictd [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Distributor Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : Distributor
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Metadata Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : PointOfContact
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Extent:
Start Date : 1997-01-01
End Date   : 1998-12-31