The GPA series is a GPS/GNSS antenna for Timing that is intended for installation on buildings. GPA-017 is a compact and lightweight package designed to withstand harsh outdoor environments including rain, wind, sunlight and temperature changes.• Input Frequency: 1575.42MHz±1.023MHz• Polarization: R. H. C. P. (Right Hand Circular Polarization)• Antenna Gain: >= 2.0dBi (at 90° elev. angle) >= -4.0dBi (at 10° elev. angle)• Output Impedance: 50 O• Pre. Amp Gain: 27.5±5.5dB• Pre. Amp Noise Figure: | GPS Antenna