Chapter 2: Installing the system
TT-98-129218-A
Placing the antenna
8
The presences of S-band radar(s) are unlikely to cause any performance degradation – as long as
the minimum distances (d min.) listed in the previous section are applied.
It is strongly recommended that interference free operation is verified experimentally before the
installation is finalized.
Other Inmarsat systems
Recommended minimum safe distance to other Inmarsat antennas is 10 m.
GPS receivers
Good quality GPS receivers will work properly very close to the antenna - typically down to one
meter outside the main beam, and down to a few meters inside the main beam. However, simple
GPS receivers with poor frequency discrimination could be affected at longer range (typically
10 m). It is always recommended to test the GPS performance before the installation is finalized.
Other transmitters
See
Minimum distance to transmitters.
on page 49 in Appendix B for minimum recommended
distance to transmitters in the frequency range below 1000 MHz.
Other precautions
Do not place the antenna close to a funnel, as smoke deposits are corrosive. Furthermore,
deposits on the radome can degrade performance.
CAUTION!
The antenna must never be installed closer to a radar than “d min.” -
even if experiments show that interference free operation can be obtained at shorter
distances than “d min.” in the previous section.
