George Joseph

George Joseph joined the Indian Space Research Organization (ISRO) in 1973 and retired as the director of the Space Applications Center in 1998. He introduced CCD technology for Earth imaging systems in India. He was instrumental in developing a variety of electro-optical sensors for ISRO’s Earth Observation programme, such as IRS and INSAT. He is the pioneer of satellite-based imaging sensors in the country and was president of ISPRS Technical Commission1 (1996-2000).


Understanding Spatial Resolution

Earth observation (EO) from space is important for resource monitoring and management. The performance of optical EO sensors is determined by four resolutions: spatial, spectral, radiometric and temporal. In this article, focusing on spatial resolution and manufacturers’ specifications, the au... (read more)