| Author | Chumnong Sorapipatana |
| Call Number | AIT Diss. no. ET-88-1 |
| Subject(s) | Solar radiation--Asia, Southeastern
Meteorological satellites
|
| Note | A dissertation submitted in partial fulfillment of the
requirements for the degree of Doctor of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | An 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. |
| Year | 1988 |
| Type | Dissertation |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Exell, Robert H.B. |
| Examination Committee(s) | Foell, Wesley K. ;Lukens, John E. ;Prida Wibulswas ;Hay, J.E.
|
| Scholarship Donor(s) | DAAD |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 1988 |
