The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This study was conducted to observe the sky radiation for air quality retrieval from spectroradiometer measurements over USM campus. The objective of this study is to evaluate the performance of a spectroradiometer for providing useful remotely sensed data for air pollution studies. Aerosol optical thickness (AOT) values were derived from the atmospheric transmittance measurements. A well known Beer-Lambert-Bouguer...
Wind carried the smoke further afield from forest fires in Sumatra caused worse air pollution in Malaysia reached extremely hazardous levels and forced schools and an airport to close. There were 3,258 'hot spots' recorded by NOAA satellites in the province of Riau only in August, each one representing a fire. USM Pulau Pinang station results and data from the atmospheric infrared sounder (AIRS) indicate...
This paper presents a transmittance measurements technique collected by using FieldSpec HandHeld (Fieldspec HH) spectroradiometer to derive the aerosol optical thickness (AOT) in the atmosphere at 550 nm to improve the particulate matters of less than 10 micron (PM10) concentrations mapping. The concentrations of PM10 at selected locations were measured simultaneously with the atmospheric transmittance...
In this study, we propose a new cost effective approach to retrieve aerosol optical thickness (AOT) data in the visible spectrum by using sky transmittance measurements measured by a handheld spectroradiometer. The transmittance values were measured in spectral region from 350 nm to 1050 nm at the earth's surface. The well known Beer-Lambert law was used in this study to retrieve AOT values from the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.