This video provides an in-depth look at ESA's ERS-1 remote sensing satellite (3 May 1991). The information is divided into 17 subjects: What is ERS-1?; Orbital Coverage; Launch; Deployment; Operations SAR (deforestation); Operations SAR (cartography); Operations SAR (environmental disasters); Operations – ATSR (sea surface temperature); Operations (wind scattermometer); Operations (radar altimeter); Data collection; Data Processing; the environment (rain forests); the environment (polar ice caps); the environment (exchange of energy); Construction and testing; Quick guide (instrument diagram). Each subject is introduced by a title page, followed by an informative animation or video.