What are the form of waves produced by GPS devices(radio waves, microwaves etc)
Freedy asked
Which type of waves do the gps devices use to transfer data and how does it happens ?
GPS broadcasts radio signals to enable GPS receivers on or near the Earth’s surface to determine location and synchronized time. GPS satellites transmit two radio signals. These are designated as L1 and L2. A Civilian GPS uses the L1 signal frequency (1575.42 MHz) in the UHF band. The L2 frequency (1227.60 MHz, wavelength 24.45 cm) only carries the P code and is only used by receivers which are designed for PPS (precision positioning code). Mostly this can be found in military receivers.To transport data signals, a suitable carrier frequency is required.
The frequency range of GPS signals is ~1.2-1.6 GHz, so you could classify the waves as very short radio waves (higher energy than FM) or very long microwaves–that frequency range is right at the “boundary” on the EM spectrum.
The frequency bluetooth devices use is 2.4 GHz, which is again close to the boundary, and can be classified as either short radio wave radiation or long microwave radiation. In advertisements, they usually market it as RF (radio-frequency) technology.
Hope that helps!
22 October 2010 @ 6am