GS10/GS15, Safety Directions
10
Lightning
conductors
Suggestion for design of a lightning conductor for a GNSS system:
1) On non-metallic structures
Protection by air terminals is recommended. An air terminal is a pointed solid or
tubular rod of conducting material with proper mounting and connection to a
conductor. The position of four air terminals can be uniformly distributed around
the antenna at a distance equal to the height of the air terminal.
The air terminal diameter should be 12 mm for copper or 15 mm for aluminium. The
height of the air terminals should be 25 cm to 50 cm. All air terminals should be
connected to the down conductors. The diameter of the air terminal should be kept
to a minimum to reduce GNSS signal shading.
2) On metallic structures
Protection is as described for non-metallic structures, but the air terminals can be
connected directly to the conducting structure without the need for down conduc-
tors.
Air terminal
arrangement, plan
view
Grounding the
instrument/antenna
CAUTION
During the transport, shipping or disposal of batteries it is possible for inappropriate
mechanical influences to constitute a fire hazard.
Precautions:
Before shipping the product or disposing of it, discharge the batteries by running the
product until they are flat.
When transporting or shipping batteries, the person in charge of the product must
ensure that the applicable national and international rules and regulations are
observed. Before transportation or shipping contact your local passenger or freight
transport company.
WARNING
High mechanical stress, high ambient temperatures or immersion into fluids can cause
leakage, fire or explosions of the batteries.
Precautions:
Protect the batteries from mechanical influences and high ambient temperatures. Do
not drop or immerse batteries into fluids.
a) Antenna
b) Support structure
c) Air terminal
GS_039
a
b
c
a) Antenna
b) Lightning conductor array
c) Antenna/instrument connection
d) Metallic mast
e) Connection to earth
GS_040
e
d
c
a
b
