context: North of the Historic Center, Azcapotzalco and Gustavo A. Madero have important industrial centers and neighborhoods that range from established middle-class colonias such as Claveria and Lindavista to huge low-income housing areas that share hillsides with adjacent municipalities in the State of Mexico. In recent years much of northern Mexico City's industry has moved to nearby municipalities in the State of Mexico. Northwest of Mexico City itself is Ciudad Satélite, a vast middle to upper-middle-class residential and business area.
question: సియుడాడ్ శాటిలైట్ అంటే ఏమిటి?
answers: a vast middle to upper-middle-class residential and business area.