How information is disseminated by satellite during disasters?
Satellites are used to effectively communicate during disasters. When a disaster hits, often satellite communication is the only means of communicating. Satellites can also provide authorities with weather updates. http://www.idirect.net/Applications/Business-Continuity-and-Disaster-Preparedness.aspx
Are you worried that the satellite won't get sunshine during a solar eclipse to power its solar panels ? Any artificial satellite whose orbit is not directly over the earth's poles is already in darkness for roughly half of every orbital revolution, 24/7. That's why every satellite has storage batteries, to save it up when the sun is shining, and keep it going when it's not . . . a lot like your cellphone or…
satellites must transmit all their information to the earth down .satellites transmit information gathered by their sensors during each contact with the ground station. They contact the station using a large dish antennae which is situated on earth, at the site of the ground station. During the contacts between the satellite and ground station the satellites usually transmit information about the state of its various subsystems abd its position in space.
The area of the earth which is imaged during a satellite orbit is referred to as the satellite swath and can range in width from ten to hundreds ofkilometers. As the satellite orbits the earth a different area is covered due to the earth's rotation. The elevation of the satellite orbit is designed so that the same location will be retraced (imaged) in a period of several weeks.
During natural calamity-be it flood, earthquake, people get displaced from their habitats,loose their livlihood and are in dire straits. These have great impact on society. Rehabilitating these displaced persons is the primary responsiblity of the state. The NGOs also extend their helping hands during natural disasters.