GPS antenna AD-15 for Trimble EZ-Guide 250 course finder, Sumy region.

GPS antenna AD-15 is recommended for work with Trimble EZ-250 direction indicators. This model is an analogue of the original AG-15 antenna, which is used to increase the accuracy and quality of the GPS signal. The AD-15 antenna makes it possible to increase the accuracy of the parallel driving systemпараллельного вождения.
Parallel driving systems help to orient themselves well in the field, and also carry out night work. The use of such antennas guarantees reliable and stable signal reception, high positioning accuracy at any time of the day.

The AD-15 high-precision antenna is made of a durable plastic housing that is resistant to the sun, rain, or other weather conditions. Strong fastening is carried out with the help of 3 neodymium magnets. This antenna is intended for operation with free signals at the L1 frequency. The case meets the IP 67 protection standard, shockproof and waterproof.

Antenna for receiving L1 GPS, L1 GLONASS and SBAS signals (WAAS, EGNOS and MSAS) in the frequency range 1574 ... 1606 MHz. Specially designed for use in high-precision agriculture (field measurement systems and parallel driving systems), as well as for other industrial or military applications. According to its technical characteristics, the antenna provides excellent suppression of the multibeam effect (reception of GNSS signals reflected from the terrain). In addition, multi-level low-noise amplifiers of the useful signal from GNSS satellites with band-pass filters are built into the antenna. It is these functions that provide unique characteristics of the accuracy of GNSS equipment functioning.(//tractor-service.com)

Technical characteristics
Received signals: L1 GPS, L1 GLONASS, SBAS
Operating frequencies: 1574 ... 1606 MHz
Polarization: right circular (RHCP)
Gain coefficient of the useful signal: minimum 28 dB
Gain unevenness: +/- 2 dB