Recent rendering of one of LightSquared's satellites Related Links: GPS Industry Groups Reject LightSquared's Network Fix FCC Announces Comment Period for TWG GPS Industry Groups Reject LightSquared's Network Fix The gloves are off in a standoff between the U.S. Global Positioning System industry and a satellite communications vendor seeking to light up a broadband satellite and terrestrial network to blanket the country.GPS interests say plans for the satellite and terrestrial voice and data network with 40,000 base stations will operate too close to GPS on the spectrum and cause damaging interference to the entire system. They accuse the vendor of
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.