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 and antennae; 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 conditioners; electronic power conditioners, remote power control modules, low voltage power supplies and power supplies for receiving and redistributing power at various voltages, and data management systems comprising electrical processors for thermal plasma analyzer, opto-electrical processors for star tracker attitude sensing instruments, and readout equipment for receiving, understanding and retransmitting signals, namely buffer amplifiers and transponders; 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 and software used in training and computer based training software in the field of search and rescue satellite ground stations

Maintenance and repair of electronic, opto-electrical and electrical instruments, apparatus and equipment, namely, satellite ground systems and equipment, namely, transmitters, receivers, antennae and power supplies; maintenance and repair of computer based training systems consisting of hardware and software used therewith in the field of search and rescue satellite ground stations; maintenance and repair of terrestrial and space communications systems and equipment, namely, receivers, transmitters, power supplies and antennae; maintenance and repair of terrestrial and aeronautical mobile terminals and antennae; maintenance and repair of spacecraft systems, power management and distribution systems and data management systems; maintenance and repair of 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

Research and development and engineering services for electronic, opto-electrical and electrical instruments, apparatus and equipment, namely, satellite ground systems and equipment, namely, transmitters, receivers, antennae and power supplies; research and development and engineering services for terrestrial and space communications systems and equipment, namely, receivers, transmitters, power supplies and antennae; research and development and engineering services for terrestrial and aeronautical mobile terminals and antennae; research and development and engineering services for spacecraft systems, power management and distribution systems and data management systems; research and development and engineering services for 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; research and development and engineering services for computer based training systems, consisting of computer hardware and software used in training