Circular polarization antenna for reception of 137 MHz or ACARS transmissions on NOAA weather satellites about 135 MHz. The quadrifilar helical antenna is a KE-137 (QFH). Thanks to the construction of the antenna, the satellites are received with a very low angle above the horizon but also when I'm on the antenna vertical. Circular polarization is required to compensate for the fluctuations of the signal strength. This is also valid for the aircraft ACARS on 135 MHz and broadcasts that can be received from the same antenna. The antenna is weatherproof and is designed for installation on pole. A terminal for installation on poles from 25 to 65 mm is included. Height approx 100 cm, weight approx 1100 gr. Connector PL female.