Browsing Institute's contributions by Author "Fernandes, A.A."
Now showing items 1-20 of 34
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Currents and Siltation at Dharamtar Creek, Bombay
Swamy, G.N.; Kolhatkar, V.M.; Fernandes, A.A. (Indian Association for Limnology and Oceanography, 1980)Hydrographic data collected in Dharamtar Creek during 1976-77 have been analysed. This showed that the waters in the Creek are well mixed and the salinity varied with the tide. The tidal currents are found to be generally ... -
Data assimilation in modeling ocean processes: A bibliographic study
Mahadevan, R.; Fernandes, A.A.; Saran, A.K. (Goa: NIO, 2002)An annotated bibliography on studies related to data assimilation in modeling ocean processes has been prepared. The bibliography listed here is not comprehensive and is not prepared from the original references. Information ... -
Data assimilation techniques in modeling ocean processes
Mahadevan, R.; Fernandes, A.A.; Naqvi, S.W.A. (National Institute of Oceanography, India, 2001)Three main classes of procedures in data analysis and assimilation viz. Objective Analysis, Optimal Interpolation and variational method, used to process the observed data on atmospheric and ocean parameters are briefly ... -
Determination of wave direction from linear and polygonal arrays
Fernandes, A.A.; Gouveia, A.D.; Nagarajan, R. (Elsevier, 1988)Two key issues that have militated against popular adoption of methods based on phase/time/path difference concepts for the determination of wave direction from array measurements are addressed in this paper: the first ... -
Determination of wave direction using an orbital following buoy
Fernandes, A.A.; Almeida, A.M.; Vaithiyanathan, R.; Vethamony, P. (Publ. and Inf. Dir., New Delhi, India, 1994)Software has been developed in FORTRAN language using a personal computer for the determination of wave direction from time series measurements of heave, pitch and roll of an orbital following buoy. The method of digital ... -
Directional spectrum of ocean waves
Fernandes, A.A.; Gouveia, A.D.; Nagarajan, R. (Bombay: Indian Institute of Technology, 1986)This paper describes a methodology for obtaining the directional spectrum of ocean waves from time series measurement of wave elevation at several gauges arranged in linear or polygonal arrays. Results of simulated studies ... -
Directional spectrum of ocean waves at Duck, North Carolina, USA from array measurements using phase/tiem/path difference methods
Fernandes, A.A.; Sarma, Y.V.B.; Menon, H.B. (1995) -
Directional spectrum of ocean waves from array measurements using phase/time/path difference methods
Fernandes, A.A.; Sarma, Y.V.B.; Menon, H.B. (Pergamon, 2000)Wave direction has for the first time been consistently, accurately and unambiguously evaluated from array measurements using the phase/time/path difference (PTPD) methods of Esteva in case of polygonal arrays and Borgman ... -
Directional wave spectra off Candolim, Goa Coast measured through ENDECO directional wave track buoy
Vethamony, P.; Vaithiyanathan, R.; Almeida, A.M.; Fernandes, A.A.; Rao, L.V.G. (1993) -
Empiricial orthogonal function description of beach profiles
Mahadevan, R.; Fernandes, A.A. (IIT Bombay, 1985) -
Factor analysis of multivariate data
Fernandes, A.A.; Mahadevan, R. (1982)A brief introduction to factor analysis is presented. A FORTRAN program, which can perform the Q-mode and R-mode factor analysis and the singular value decomposition of a given data matrix is presented in Appendix B. This ... -
Harmonic analysis and tidal prediction
Fernandes, A.A. (NIO, Goa, 1991) -
Harmonic tidal analysis at a few stations using the least squares method
Fernandes, A.A.; Das, V.K.; Bahulayan, N. (Indian Association for Limnology and Oceanography, 1991)Using the least squares method, harmonic analysis has been performed on hourly water level records of 29 days at several stations depicting different types of non-tidal noise. For a tidal record at Mormugao, which was free ... -
Inter-comparison between Aanderaa and Potok current meters deployed during INDEX programme
Fernandes, A.A.; Pednekar, S.M.; Vethamony, P. (International Society of Offshore and Polar Engineers, Cupertino, CA (USA), 1999)The results of inter-comparison study between the Aanderaa RCM 7 and Potok 2M current meters deployed in the Southern Equatorial Indian Ocean during April to September 1996 in phase-2 of the INDEX programme has been ... -
Multivariate data analysis
Fernandes, A.A.; Antony, M.K.; Somayajulu, Y.K.; Sarma, Y.V.B.; Almeida, A.M.; Mahadevan, R. (National Institute of Oceanography, Goa, 2005)This report describes some of the multivariate data analysis techniques used in meteorology and oceanography and provides the necessary background and software to undertake appropriate analyses of a given data set. The ... -
Observed currents at Bombay High during a winter
Fernandes, A.A.; Chandramohan, P.; Nayak, B.U. (Indian Association for Limnology and Oceanography, 1993)Ten day records of Aanderaa current meters (24 Dec 1981 to 2 Jan. 1982) at four depths, viz. 30, 45, 60 and 75 m at Bombay High (19˚24.5'N, 71˚2.5'E) off the west coast of India, in a water depth of 80 m have been subjected ... -
On the spectra and coherence of some surface meteorological parameters in the Arabian Sea
RameshKumar, M.R.; Fernandes, A.A. (Indian Society for Physical Sciences of the Oceans, 1992)Spectra and cross-spectra of monthly time series of the surface meteorological parameters, sea surface temperature, air temperature, cloudiness, wind speed and sea level pressure were computed for the period 1948-1972 over ... -
Quaternary radiolarian faunal changes in the tropical Indian Ocean: Inferences to paleomonsoonal oscillation of the 10 degrees S hydrographic front
Gupta, S.M.; Fernandes, A.A. (Current Science Association, Bangalore, 1997)The northern Indian Ocean is characterized by three distinct surface water masses, i.e. (1) highly saline (greater than 34.5 ppt) Arabian Sea, (2) low saline (less than 34.5 ppt) Bay of Bengal and (3) a moderate salinity ... -
Scattering of Rossby and Poincare waves off rough lateral boundaries
Fernandes, A.A.; Prahalad, Y.S.; Sengupta, D. (Elsevier, 1989)Unified treatment of wave scattering from a rough boundary, which was originally developed by Nakayama et al. is presented. The stationary nature of the boundary process is used to show that the wave field is also stationary, ... -
Spectral characteristics of fine structure off the mouth of Persian Gulf in the Northern Arabian Sea
Varma, K.K.; Fernandes, A.A.; Rao, L.V.G. (CSIR-NISCAIR, 1979)