The US government
flicked the switch today on a new GPS signal, known as L2C. The signal, according to the government, is transmitted at
a higher effective power, allowing it to "work better in urban areas and indoors." The new signal, being
transmitted by the IIR
satellite launched in September, can also be received using less power, potentially allowing better GPS reception
by smaller devices such as cellphones. However, most current devices may not be able to make use of the new signals
without upgrades.[Via PhoneScoop]