The Global Positioning System (GPS) is a network of about 30 satellites orbiting the Earth at an altitude of 20,000 km.
There are 435 voting members in the House of Representatives.
The House of Representatives is composed of 480 members, of whom 300 are elected from the single-seat constituencies and 180 by the proportional representation system in which the nation is divided into 11 electoral blocs which according to size return between 6 and 30 members.