%0 Journal Article
%@nexthigherunit 8JMKD3MGPCW/3EUPEJL
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@resumeid
%@resumeid
%@resumeid
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%@resumeid 8JMKD3MGP5W/3C9JHMS
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%X A multi-channel microwave radiometre (make: Radiometrics Corporation) is installed at Instituto Nacional de Pesquisas Espaciais-INPE, Brazil (22 degrees S). The radiometric output of two channels of the radiometer in the form of brightness temperature at 23.834 GHz and 30 GHz, initially, were used to find out the ambient water vapor content and the non-precipitable cloud liquid water content. The necessary algorithm was developed for the purpose. The best results were obtained using the hinge frequency 23.834 GHz and 30 GHz pair having an r.m.s. error of only 2.64. The same methodology was then adopted exploiting 23.034 GHz and 30 GHz pair. In that case the r.m.s. error was 3.42. These results were then compared with those obtained over Kolkata (22 degrees N), India, by using 22.234 GHz and 31.4 GHz radiometric data. This work conclusively suggests the use of a frequency should not be at the water vapor resonance line. Instead, while measuring the vapor content for separation of vapor and cloud liquid, one of them should be a few GHz left or right from the resonance line i.e., at 23.834 GHz and the other one should be around 30 GHz.
%8 Nov
%N 9
%T Radiometric estimation of water vapor content over Brazil
%@electronicmailaddress karmakar_p_k@yahoo.com
%@electronicmailaddress manab1972@yahoo.com
%@electronicmailaddress
%@electronicmailaddress carlos.angelis@cptec.inpe.br
%@electronicmailaddress machado@cptec.inpe.br
%@secondarytype PRE PI
%K Dual frequency, Radiosonde, Radiometer, Water vapor, Liquid water.
%@usergroup administrator
%@usergroup lattes
%@usergroup secretaria.cpa@dir.inpe.br
%@group
%@group
%@group
%@group CPT-CPT-INPE-MCT-BR
%@group CPT-CPT-INPE-MCT-BR
%@e-mailaddress machado@cptec.inpe.br
%3 Karmakar-AdvSpaceRes-v48-n9-p1506-14-science[1].pdf
%@secondarymark B4_ASTRONOMIA_/_FÍSICA B3_CIÊNCIAS_BIOLÓGICAS_I B1_ENGENHARIAS_III B1_ENGENHARIAS_IV B1_GEOCIÊNCIAS B1_INTERDISCIPLINAR
%F lattes: 5379515759830546 5 KARMAKARMaiSetAngMac:2011:RaEsOf
%@issn 0273-1177
%2 dpi.inpe.br/plutao/2011/09.22.20.24.26
%@affiliation Univ Calcutta, Inst Radiophys & Elect, Ctr Res & Training
%@affiliation MCKV Inst Engn, Liluah 711204, Howrah, India.
%@affiliation Centre for Research and Training in Microwave and Millimeter Wave, Institute of Radiophysics and Electronics, University of Calcutta, 92. A.P.C Road, Kolkata 700 009, India
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@project CNPq[680002/2007 - 3]
%B Advances in Space Research
%@versiontype publisher
%P 1506-1514
%4 dpi.inpe.br/plutao/2011/09.22.20.24
%@documentstage not transferred
%D 2011
%V 48
%@doi 10.1016/j.asr.2011.06.032
%A Karmakar, Pranab K.,
%A Maiti, M.,
%A Sett, S.,
%A Angelis, C. F.,
%A Machado, Luiz Augusto Toledo,
%@dissemination WEBSCI; PORTALCAPES; MGA; COMPENDEX.
%@area MET