15 April 2009

The new GPS L5 signal

The new GPS IIR-20(M) satellite started to transmit on the L5 frequency band. This is the third GPS civilian signal. It should improve the GPS accuracy and it should be used for safety of life applications. US Air Force reports that this broadcast brings into use the GPS International Telecommunication Union filing at 1176.45 MHz in the highly protected and co-allocated Radio Navigation Satellite Service and Aeronautical Radio Navigation Service band.

The Figure shows the time series and power spectrum of the L5 demonstration signal. [Credit Air Force - Los Angeles Air Force Base]