Satellite cities are smaller cities that are near to a large city that is the center of a metropolitan area. They are different from suburbs, subdivisions and bedroom communities because they have their own centre. Satellite cities could be separate cities outside of the larger metropolitan areas. However, working as part of a metropolis, a satellite city gets "cross-commuting" (people living in the city working outside of the city and people from other places working in the city). For example, London has several satellite cities, like Brentwood, Crawley and Chelmsford. New Haven and Bridgeport are among the satellites of New York City. Ipswich, Queensland, is a satellite to Brisbane (Australia) and Kitchener and Guelph, to Toronto (Canada).
Satellite cities are almost self sufficient in terms of amenities and facilities. They usually have all of the things to term them as a separate city but they rely on the parent city or the nearby larger metropolitan area for some of their needs like education or employment.