NavCom SF-3050 Rev.A - Manual (Page 97)

SF-3050 User Guide – Rev A
4-95
close proximity to each other can create multipath
and oscillations between the antennas. These add
to position error or the inability to process
satellite signals.
Most antenna’s have better gain w
the
hen the satellite
elevation. Expect tracking performance
not
nal strength) throughout
on
ss
(av
 A c
the
loc ck the
synchronized 35,768kms above the Equator,
currently at Longitudes 15.5
° West, 97.65° West,
142
° West, 025° East, 109° East, and
178
° East. An inclination and bearing estimation
tool is available on NavCom’s website to aid in
determining potential obstructions to StarFire
signal.
Tall L-band Antenna (High Latitude L-Band
Antenna Kit option)
built-in
good is
.
The be as
the sta orms
with many antenna systems, it is better to locate the

is high in
to fade as the satellite lowers in elevation. It is
unusual to see 10dB difference in antenna gain
(which translates into sig
the entire elevation tracking path.
 Map obstructions above the horizon using a
compass and inclinometer. Use satellite predicti
software with a recent satellite almanac to asse
the impact on satellite visibility at that location
ailable on NavCom’s web site).
lear line of sight between the antenna and
al INMARSAT satellite is required to tra
StarFire signal. INMARSAT satellites are geo-
The separate Tall L-band antenna is used in high
latitude applications and most frequently on marine
vessels. This is an active antenna, meaning it has a
LNA. Therefore, this antenna should have
olation from other near-frequency antennae
st practice is to follow the same precautions
ndard GNSS antenna. On marine platf