radio signal However, the GPS satellite broadcasts very weak radio signal with low power Two Frequencies, L1 and L2. The first frequency is Intended as a Civilian GPS broadcast band at a frequency of 1575.42. The later frequency L2 is Intended to provide statement Stronger transmission signal for the Future. The signals pass through Canon glass, plastic and clouds and always move in a straight line though THEY Cdn not pass through the metals and brickwork. That's why it is imperative to position the antenna in a spot Where It Cdn face the clear sky. Replica Gucci Purses. There are Some ideal locations for it Such as on the roof top and if it is impractical to position it on the roof top then you-can spot it in the side of a building or near a window.