A GNSS or GPS antenna receives and amplifies the radio signals transmitted on specific frequencies by GNSS satellites and converts them to an electronic signal used by a GNSS or GPS receiver. The GNSS or GPS antenna output is fed into a GNSS or GPS receiver that can compute the position. These antennas are the primary interface through which GNSS or GPS receivers take external UTC input and provide UTC traceability information through its output signals in 1PPS, 10MHz and TOD.