03380cas|a2200277 i 450000500170000000800410001703500150005810000260007324500830009926000520018230000110023449000330024550001630027850000570044152021600049865000400265865000300269870000380272870000460276670000450281270000460285770000390290371000300294281000650297285600650303720260818154335.0181197s1988    th  uzm rtt  00|  a1eng d  a.b1042197x0 aChumnong Sorapipatana10aMapping solar radiation over Southeast Asia by meteorological satellite images  aBangkok :bAsian Institute of Technology,c1988  a170 p.1 aDissertation ;vno. ET-88-01  aA dissertation submitted in partial fulfillment of the  requirements for the degree of Doctor of Engineering, School of Environment, Resources and Development  aThesis (Ph.D.) - Asian Institute of Technology, 1988  aAn attempt has been made to develop a new method of  estimating daily insolation for use by developing countries in  Southeast Asia where there is a problem of data unavailability  due to lack of pyranometric measuring sites.  The technique developed involves the use of Visible  Infra- red Spin-Scan Radiometer System (VISSR ) data from the  Japanese GMS-3 satellite to obtain the cloud parameters, namely  fractional cloud amount and cloud albedo, affecting incoming  solar radiation. The two effects are then combined into a single  cloud effectiveness parameter. It was found that cloud  effectiveness is linearly correlated with the atmospheric  transmissivity . In comparisons between solar radiation estimated  by the model and ground truth data, good agreement between the  actual and model- derived hourly and daily global radiation was  found , with root mean square errors of less than 12% and 14% of  the means , respectively.  The technique was adopted to map insolation for large  geographical areas of the region through an operational system  developed for implementation on an IBM 3083 computer . The system  involves: (1 ) satellite data display and man- computer  interaction on an image processor for data retrieval, ( 2)  expertise in the navigation of satellite imagery and calibration  of satellite data , (3 ) a library of software developed to enable  the IBM 3083 to process satellite imagery .  Finally, the capability of daily insolation mapping from  satellite measurements is demonstrated. The method was  implemented operationally and used to compute insolation fields  for large geographical areas of the region between 98°E - 105°E  and 10°N - 20°N for the winter and the summer months of 1986 and  87 . Satellite data sampled for 61 days were regressed with a set  of pyranometer measurements. The insolation mapping obtained was  of high quality, with relatively small spatial scale resolution  fields of 1/2 degree grid point spacing . The strong correlation  between insolation and cloudiness is verified, the cloudiness  being affected in turn more by geographical terrain than by  seasonal changes in the region. 0aSolar radiationxAsia, Southeastern 0aMeteorological satellites1 aExell, Robert H.B., eChairperson1 aFoell, Wesley K., eExamination Committee1 aLukens, John E., eExamination Committee0 aPrida Wibulswas\, eExamination Committee1 aHay, J.E., eExamination Committee2 aDAAD. eScholarship Donor2 aAsian Institute of Technology.tDissertation ;vno. ET-88-01  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B18791