Software distribution system and software receiving terminal apparatus

摘要

A terminal apparatus has a reception unit for receiving a data group or a program group distributed from a satellite or a ground distribution system, and an update sequence management unit. The update sequence management unit searches data or a program of the terminal apparatus to be updated and data or a program necessary for updating the data or the program of the terminal apparatus, from the data group or the program group, determines an update sequence of the searched program or data, and updates the program or data of the terminal apparatus in accordance with the determined update sequence.