The performance of the constellations satellites based on reliability

Most traditional satellite constellation design methods are associated with a simple zonal or global, continuous or discontinuous coverage connected with a visibility of points on the Earth's surface. A new geometric approach for more complex coverage of a geographic region is proposed. A method is developed for incorporating satellite reliability into a satellite system value model when satellites are used in constellations. The value model provides a method for trading reliability against cost, weight or other attributes. satellite constellations in circular orbits are currently used in many applications: communication, navigation, and remote sensing. Satellite constellation design for continuous single and multiple global coverage of the Earth's surface has been examined.