Inclined Obit

   A condition in which a satellite is unable to maintain a geostationary position above the earth's equator. Almost all satellites generate electrical power to operate their transponders by converting the sun's energy to electricity. Energy used for station keeping, that is keeping the satellite within a very narrow range of movement north or south of the equator, is stored on board the spacecraft and over time is dissipated, usually after passage of the design life of between 8-15 years.

Interaction Instructional Television Fixed Service (ITFS)

   Microwave-based, high-frequency television used in educational program delivery.

IRD

   An integrated receiver and decoder for reception of a transmission of voice, video and data.

ISDN

   Integrated services digital network. A standard for the integrated transmission of voice, video, and data developed by the Consultative Committee on International Telephony and Telegraphy (CCITT).

Internet Service Provider (ISP)

   A business or organization that provides consumers or businesses access to the Internet and related services.