A Direct Algorithm for Estimating Land Surface Broadband Albedos From MODIS Imagery
| dc.contributor.author | Liang, Shunlin | |
| dc.date.accessioned | 2007-02-28T21:00:58Z | |
| dc.date.available | 2007-02-28T21:00:58Z | |
| dc.date.issued | 2003-01 | |
| dc.description.abstract | Land surface albedo is a critical variable needed in land surface modeling. The conventional methods for estimating broadband albedos rely on a series of steps in the processing chain, including atmospheric correction, surface angular modeling, and narrowband-to-broadband albedo conversions. Unfortunately, errors associated with each procedure may be accumulated and significantly impact the accuracy of the final albedo products. In an earlier study, we developed a new direct procedure that links the top-of-atmosphere spectral albedos with land surface broadband albedos without performing atmospheric correction and other processes. In this paper, this method is further improved in several aspects and implemented using actual Moderate Resolution Imaging Spectroradiometer (MODIS) imagery. Several case studies indicated that this new method can predict land surface broadband albedos very accurately and eliminate aerosol effects effectively. It is very promising for global applications and is particularly suitable for nonvegetated land surfaces. Note that a Lambertian surface has been assumed in the radiative transfer simulation in this paper as a first-order approximation; this assumption can be easily removed as long as a global bidirectional reflectance distribution function climatology is available, | en |
| dc.description.sponsorship | This work was supported in part by the National Aeronautics and Space Administration (NASA) under Grant NAG5-6459. | en |
| dc.format.extent | 1000756 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.citation | Liang, S., (2003), A Direct Algorithm for Estimating Land Surface Broadband Albedos From MODIS Imagery, IEEE Transactions on Geosciences and Remote Sensing, 41 (1): 136-145. | en |
| dc.identifier.uri | http://hdl.handle.net/1903/4323 | |
| dc.language.iso | en_US | en |
| dc.publisher | Institute of Electrical and Electronics Engineers | en |
| dc.relation.isAvailableAt | College of Behavioral & Social Sciences | en_us |
| dc.relation.isAvailableAt | Geography | en_us |
| dc.relation.isAvailableAt | Digital Repository at the University of Maryland | en_us |
| dc.relation.isAvailableAt | University of Maryland (College Park, Md.) | en_us |
| dc.rights.license | Copyright Institute of Electrical and Electronics Engineers. | en_us |
| dc.subject | broadband albedo | en |
| dc.subject | land surface | en |
| dc.subject | MODIS | en |
| dc.subject | multispectral imagery | en |
| dc.subject | remote sensing | en |
| dc.subject | Moderate Resolution Imaging Spectroradiometer | en |
| dc.title | A Direct Algorithm for Estimating Land Surface Broadband Albedos From MODIS Imagery | en |
| dc.type | Article | en |