Retrieval of water properties from satellite-borne imagers viewing oceans and coastal areas in the visible region spectrum requires removing effect atmosphere, which contributes approximately 80–90% measured radiance over open ocean blue spectral region. The Gordon Wang algorithm originally developed for SeaWiFS (and used with other NASA sensors, e.g., MODIS) forms basis many atmospheric remova...

ABSTRACT Measurements of the lunar surface in the visible and near infrared wavelength regions provide a new and intriguing method of determining changes in the sensitivities of Earth observing radiometers. Lunar measurements are part of the calibration strategy for the instruments in the Earth Observing System (EOS)' and part of the calibration strategy for the Sea Viewing Wide Field of View S...

The National Aeronautics & Space Administration (NASA) Sea viewing Wide Field of view Sensor (SeaWiFS) began operational measurement of ocean colour in September 1997. Upgrades to the SeaWiFS data processing system (SeaDAS) have occurred frequently and the effects of these revisions on the remotely sensed estimates of chlorophyll-a concentration (chl-a) have been significant. Measurements of ch...

We report on the lunar and solar measurements used to determine the changes in the radiometric sensitivity of the Sea-viewing Wide Field-of-view Sensor (SeaWiFS). Radiometric sensitivity is defined as the output from the instrument (or from one of the instrument bands) per unit spectral radiance at the instrument's input aperture. Knowledge of the long-term repeatability of the SeaWiFS measurem...

Seasonal cycles, interannual variations and decadal trends of Sea-viewing Wide Field-of-view Sensor (SeaWiFS)-retrieved chlorophyll-a concentration (Chl-a) in the Strait of Malacca (SM) were investigated with reconstructed, cloud-free SeaWiFS Chl-a during the period of the SeaWiFS full mission (September 1997 to December 2010). Pixel-based non-parametric correlations of SeaWiFS Chl-a on environ...

In order to complement present water quality monitoring of large lakes, we have attempted to make use of satellite imagery. In addition to ocean color sensors SeaWiFS and MODIS, lately MERIS images also became available. Here we analyze 18 almost cloud free full resolution atmospherically corrected MERIS images over the large European lakes Vättern, Vänern and Peipsi, where water type ranges fr...

The modular optoelectronic scanner (MOS) is a German instrument that was launched in the spring of 1996 on the Indian IRS-P3 satellite. With the successful launch of NASA’s Sea-viewing Wide Field-of-view Sensor (SeaWiFS) in the summer of 1997, there are now two ocean color missions in concurrent operation, and there is interest within the scientific community to compare data from these two sens...

This study employed water transparent characteristics from the Gulf and archipelago of Finland and the corresponding data sets of optical sensors at the green wavelength band to estimate Secchi disk depth (SDD). The SDD is one major optical measurement of water transparency in the study area, where the coastal waters are dominated by absorption from both dissolved and particulate organic matter...