Paper Title
Cost-Benefit Analysis of Two-Identical Warm Standby Satellite System Subject to Failure of Navigation Systems and Satellite Hardware Damage under Effects of Solar Events and Geomagnetic Storm with Different Repair Facilities

Abstract
A geomagnetic storm is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave and/or cloud of magnetic field which interacts with the Earth's magnetic field. The increase in the solar wind pressure initially compresses the magnetosphere and the solar wind's magnetic field interacts with the Earth’s magnetic field and transfers an increased energy into the magnetosphere. Both interactions cause an increase in movement of plasma through the magnetosphere (driven by increased electric fields inside the magnetosphere) and an increase in electric current in the magnetosphere and ionosphere. In the present paper we have taken failure due to inaccurate Navigators information during solar event and geomagnetic storms and failure due to Satellite hardware damage under effects of geomagnetic storm with different repair facilities. When the main unit fails then warm standby system becomes operative. Failure due to Satellite hardware damage cannot occur simultaneously in both the units and after failure the unit undergoes Type-I or Type-II or Type-III or Type IV repair facility immediately. Applying the regenerative point technique with renewal process theory the various reliability parameters MTSF, Availability, Busy period, Benefit-Function analysis have been evaluated. Keywords: Warm Standby, failure due to inaccurate Navigators information during solar event and geomagnetic storms, failure due to Satellite hardware damage, first come first serve, MTSF, Availability, Busy period, Benefit -Function.