User`s guide

Chapter 2 __________________________________________________________ Product Overview
VAISALA_______________________________________________________________________ 45
GOES Crossed Yagi Antenna
GOES Crossed Yagi Antenna is a lightweight, all-weather antenna
designed to operate in the 401 to 402 MHz frequency range. This
antenna radiates right-hand circular polarized energy in a pencil beam
pattern with a beam width of approximately 45 degrees measured at the
half-power points. The input impedance is 50 ohms, and the VSWR
across the operating frequency range of the antenna is better than 2:1.
Antenna gain is approximately 10 dB and is designed to provide
optimum signal levels at the GOES satellite when connected to the
10 W GOES radio transmitter. The antenna is designed to be
conveniently disassembled for transport.
GPS Antenna
0403-027
Figure 35 GPS Antenna for the GOES Transmitter
The GPS antenna is delivered with the GOES transmitter for accurate
time synchronization. The unit is interfaced via the GOES transmitter
with a weather station.