First Indian Solar Astronomical Program at Antarctica Study of Large Convective Cells.

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Brief Description (Abstract):

Continuous monitoring of the sun has great advantage in finding answer to many problems such as helioseismology, evolution of activity and supergranulation which has a lifetime of about 20 hours. To study the evolution and decay of these large convective cells known as supergranules, a solar telescope was set up at the Maitri station in Antarctica region during the local summer months (December 1989 through March 1990). The need for astronomical observations from Antarctica, the experimental set up to obtain the filtergrams of the sun through K-line(l .2 A pass band) filter and the observing conditions at Maitri have been described.

Status: Completed

Purpose: The study of evolution of these large cells will reveal the physical characteristics of the deeper convective layers and manifestation of the magnetic fields on the sun. To achieve this goal one needs data at least for 2-3 days without the interruption of day-night cycle. To obtain continuous data first attempt was made, during the international Geophysical year (July 1957-December 1958) by setting up worldwide network of small telescopes equipped with hydrogen H-alpha filters to record solar activity (Harvey, Pomerantz and Duvall, 1982). The collective contribution from different observatories, although substantial, lacked uniformity and there were frequent gaps in the data. Despite these problems, a network station is still the accepted method for carrying out solar research requiring continuity over long periods of time. A network of 6 stations known as Global Oscillation Network Group is being planned to study oscillations on the solar surface and thereby probe the interior of sun.

Presentation Format: Documentdigital

Distribution Format: unknown

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Supplemental Information:

TableDigital

Keyword(s): Earth Science-Spectral/Engineering,

Place/Location(s): Maitri, Antarctic,

Project: First Indian Solar Astronomical Program at Antarctica Study of Large Convective Cells,

Topic Category(s): GeoScientific Information,

Date(s): 2020-09-08 (Creation),

Resource Contact(s):
1. Name : Dr. Jagdev Singh
    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 : 1989-01-01
End Date   : 1990-12-31