9 electronic, opto-electrical and electrical instruments, apparatus and equipment, namely, satellite ground systems consisting of transmitters, receivers, antennae and power supplies and satellite ground systems equipment, namely, transmitters, receivers, antennae and power supplies; terrestrial and space communications systems consisting of receivers, transmitters, power supplies; terrestrial and space communications equipment, namely, receivers, transmitters, power supplies and antennae; terrestrial and aeronautical mobile terminals and antennae; spacecraft systems, namely, power management and distribution systems comprising; joint power supplies and power supplies for receiving and redistributing power at various voltages, and data management systems comprising electrical processors for thermal plasma analyzer, electrical processors for thermal plasma analyzer, electrical processors for star tracker attitude sensing instrument, and readout equipment for receiving, understanding and retransmitting signals, namely; scientific equipment for use in space, namely, instruments to measure wind velocity and temperature in the upper atmosphere, ultraviolet imaging instruments, instruments which measure the properties of radio waves in space; computer based training systems, consisting of computer hardware an software used in training and computer based training software in the field of search and rescue satellite ground stations