Boundary Layer Studies by Acoustic Sounder at Indian Antarctic Station Maitri.

Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF2073870410&userType=user&freeTextValue=Boundary+Layer+Studies+by+Acoustic+Sounder+at+Indian+Antarctic+Station+Maitri.

Brief Description (Abstract):

An acoustic sounder system designed and developed at NPL was installed at Maitri in austral summer of 1991. This instrument consists of a low' power audio frequency generator, transmitting tone burst vertically up in the air and receving the weak echo returning from atmospheric irregularities and recording them on facsimile recorder/ digital printer. Among the various types of structures observed by the acoustic sounder, were the echo patterns, representing ground based inversions and variable structures on the surface of the inversion layer, throwing light on the nature of planetary boundary layer.

Status: Completed

Purpose: The Acoustic Sounder is a remote sensing tool to probe the atmosphere. It can give real time values of the structure parameters as can be obtained by meteorological tower and aircraft techniques. The system is capable of monitoring the structure turbulent boundary layer. It provides an inexpensive method to probe the complete dynamics which is represented in a simple picture form for various practical applications. Gilman et al, (1946) were the first to use the acoustic sounder in studies of signal fadings in the troposcatter trans-horizon microwave radio link over the 64 km distance between New York and New Jersey. A correlation between microwave radio fadings and the structure parameter obtained by the acoustic sounder was reported. During mid 60s, Mc Allister (1968) re-discovered the potential use of the acoustic scattered intensity from the atmosphere due to fluctuations in the wind velocity and temperature.

Presentation Format: Documentdigital

Distribution Format: unknown

Distribution Format Version: unknown

Supplemental Information:

TableDigital

Keyword(s): Earth Science-Human Dimensions,

Place/Location(s): Maitri, Antarctic,

Project: Boundary Layer Studies by Acoustic Sounder at Indian Antarctic Station Maitri,

Topic Category(s): Boundaries,

Date(s): 2020-09-11 (Creation),

Resource Contact(s):
1. Name : Dr. A K Hanjura
    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 : 1990-01-01
End Date   : 1991-12-31