Satellite Internet access is Internet access provided through communications satellites. Ion thrusters are used on some satellites and spacecraft. The protocol applies to objects functioning in space like satellites or satellite parts. Such orbits are useful for telecommunications satellites. Space junk can be a hazard to active satellites and spacecraft. India currently has 10 remote sensing satellites in orbit. The exosphere contains most of the satellites orbiting Earth. The bearing for geostationary satellites is constant. ISRO currently operates three Radar Imaging Satellites (RISAT). There are methods available to detect hail-producing thunderstorms using weather satellites and weather radar imagery. Orbital velocity of the satellites is approximately . Receivers are auxiliary systems mounted on several types of satellites. These methods are less precise than observations of artificial satellites. He had discovered three of Jupiter's four largest satellites (moons). CNN news was transmitted via INTELSAT communications satellites.