WorldCat Identities

Paul, A. K.

Overview
Works: 24 works in 36 publications in 1 language and 261 library holdings
Genres: Observations  Conference papers and proceedings  Census data 
Roles: Author, Editor, Other
Classifications: QC881.2.I6, 551.5145
Publication Timeline
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Most widely held works by A. K Paul
Toward global monitoring of the ionosphere in real time by a modern ionosonde network : the geophysical requirements and technological opportunity by J. W Wright( Book )

4 editions published in 1981 in English and held by 135 WorldCat member libraries worldwide

Advances in global/regional descriptions of ionospheric parameters : proceedings of URSI/COSPAR Symposium held in Athens, Greece, 1-4 October, 1991 by URSI/COSPAR Symposium( Book )

4 editions published in 1992 in English and held by 52 WorldCat member libraries worldwide

Off median phenomena and international reference ionosphere : proceedings of the COSPAR International Scientific Symposium held in Trieste, Italy, 19-22 October 1993 by COSPAR( Book )

6 editions published between 1994 and 1995 in English and held by 48 WorldCat member libraries worldwide

Handicraft survey report, wood carving of the Wanchos by Arunāchal Pradesh (India)( Book )

2 editions published in 1989 in English and held by 4 WorldCat member libraries worldwide

Modern history, with university questions and maps. New syllabus by A. K Paul( Book )

in English and held by 2 WorldCat member libraries worldwide

Mikir of Assam by A. K Paul( Book )

1 edition published in 1972 in English and held by 2 WorldCat member libraries worldwide

Processing of Digital Ionograms( Book )

1 edition published in 1982 in English and held by 1 WorldCat member library worldwide

More precise and more complete (amplitude and phase) information can be obtained with modern digital ionosondes. This in turn stimulated the development of new data processing routines which can provide new and better information about the ionosphere. The mathematical principles of computing angle of arrival (echo-location), Doppler velocity, and more accurate virtual heights; separating overlapping ordinary and extraordinary echos; estimating peak parameters; etc are described together with some applications and first steps toward automatic scaling of ionograms. (Author)
Comparison of San Diego Observations (March 1992) with IRI Parameters( )

1 edition published in 1993 in English and held by 1 WorldCat member library worldwide

During the month of March 1992, the new four channel ionosonde at NRaD was used to obtain ionograms at five minute intervals. Using the method of Paul, the standard F2 layer parameters (HmF2 and foF2) were extracted from the data at fifteen minute intervals. In this paper we present a comparison of these experimentally determined parameters to those predicted, for the same time and conditions, by the International Reference Ionosphere ... Electromagnetic, Propagation, Electro-optics, Atmosphere
Fitting of Discrete Irregularly Spaced Data with Differentiable Functions: Application to Ray Tracing in the Ionosphere( )

1 edition published in 1991 in English and held by 1 WorldCat member library worldwide

Frequently, data are collected at irregularly spaced grid points, and for a variety of reasons, there is usually a need for interpolation; for example, a two dimensional graphical representation in the form of maps showing contour lines of constant values (isobars in weather maps). In many cases, this is not a trivial task, especially when the grid points are irregular and large data gaps exist. This problem, as it exists for ionospheric data, was discussed by Rush et al. If the data can be fitted with a continuous function that has continuous partial derivatives, the computation of contour lines is relatively easy. The electron density in the ionosphere at a given time is a function of latitude, longitude, and height. Horizontal gradients of the electron density can cause significant deviation of the ray path distance and direction from that expected under the assumption of horizontal stratification of the ionosphere. To improve propagation predictions under such circumstances, ray tracing studies that require the knowledge of the density and its gradient for every point along each ray path are needed. Similar remarks apply to the vertical sounding of the ionosphere, where horizontal gradients cause deviation from vertical propagation and limit the accuracy of electron density profile calculations unless angle of arrival data are available and corresponding corrections can be obtained by means of ray tracing. This report introduces a process for fitting discrete data given, at irregular grid points with one function that is continuous and has finite continuous first- and higher-order derivatives everywhere
Some Results with the New Digital Ionosonde in San Diego( )

1 edition published in 1993 in English and held by 1 WorldCat member library worldwide

The new digital ionosonde (Dynasonde) became operational in early March 1992. The system takes ionograms in five minute intervals and the data are processed, extracting F-region profile and propagation parameters on a routine basis. The data verify earlier findings that a minimum sampling rate of twelve ionograms per hour is necessary to avoid aliasing. The most surprising result to date is the observation of large variations of the height of the F-region maximum (of the order of 100 km) during the nighttime hours of otherwise undisturbed days in late March and early April. The observed height variations are quasi-periodic, with periods of two to three hours and appear to have little effect on the F-region maximum electron density
Census of India, 1981 by N.K Bhattacharyya( Book )

1 edition published in 1989 in English and held by 1 WorldCat member library worldwide

Diurnal, Seasonal and Solar Activity Variations of F-Region Parameters( )

1 edition published in 1994 in English and held by 1 WorldCat member library worldwide

This abstract describes a presentation at the Radio Science Meeting in Boulder, CO. The presentation was on diurnal, Seasonal and solar activity variations of F-region parameters
The MUF (Maximum Usable Frequency) (3000) as an Indicator for F-Region Variations( Book )

1 edition published in 1988 in English and held by 1 WorldCat member library worldwide

Ionograms recorded at Brighton, Colorado during the last sunspot maximum are still being studied. Samples show that the high quality and high temporal resolution of the data may yield new information about the dynamics of the ionosphere, especially in the F-region. F-region parameters from these data show that this part of the ionosphere is highly variable, with short periods of the order of the order of fractions of an hour. This report explains why the maximum usable frequency (MUF) (3000) appears to be the most appropriate indicator for F-region variations
Religion( Book )

1 edition published in 1997 in English and held by 1 WorldCat member library worldwide

Advances in global/regional descriptions of ionospheric parameters : Symposium : Papers( Book )

1 edition published in 1992 in English and held by 1 WorldCat member library worldwide

Some aspect of estimation of genetic parameters for stay ability in Dairy cattle by A. K Paul( )

1 edition published in 1997 in English and held by 1 WorldCat member library worldwide

India and the Commonwealth in the Korean war. by A. K Paul( Book )

1 edition published in 1953 in English and held by 1 WorldCat member library worldwide

Advances in global / proceedings of URSI/COSPAR Symposium held in Athens, Greece 1-4 October, 1991 by A.K Paul( Book )

1 edition published in 1993 in English and held by 1 WorldCat member library worldwide

Impirical study of different selection strategies for genetic improvement by A. K Paul( )

1 edition published in 1993 in English and held by 1 WorldCat member library worldwide

Stoelting's anesthesia & co-existing disease by A. K PAUL( Book )

1 edition published in 2014 in English and held by 1 WorldCat member library worldwide

 
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Languages
English (32)