Calibration
6-8
Chapter 6: Configuration
98-146706-A
6.2.3
Azimuth calibration
Azimuth calibration is done toward a satellite of a known position. After finding the
satellite, the system can calculate the azimuth offset of the ADU installation. The satellite
and transponder properties for the calibration can be selected from a list of service profiles
or supplied manually.
You can make an azimuth calibration in the following ways:
• Automatic azimuth calibration
• User-controlled azimuth calibration
• User-controlled azimuth calibration with a service profile
Automatic azimuth calibration with an active satellite profile:
If there is no line of sight to an azimuth calibration satellite from the place of installation
you can enable automatic azimuth calibration. When the vessel leaves the harbour and gets
line of sight to the calibration satellite, the system automatically finds and tracks the
satellite and makes the azimuth calibration. After a successful azimuth calibration the ACU
will automatically disable the
Azimuth calibration (active satellite profile)
on the
page
SERVICE > Calibration
.
1. Click
SERVICE > Calibration
.
2. Select
Enable
in the section
Azimuth calibration
(active satellite profile). To be able
to use this feature you must have made a valid satellite profile and activate it.
3. Click
Apply
.
4. Switch on the modem.
User controlled azimuth calibration with user defined input
1. On the page
SERVICE > Calibration
, in the section
Azimuth calibration (user
controlled)
, select
User defined
in the
Satellite
drop down list.
2. Type in the longitude of the satellite. See Table 6-1 on page 6-4
Validate result
(10 s per result)
10 - 30 s
10 - 30 s
10 - 30 s
10 - 30 s
10 - 30 s
Max. total time
25 - 45 s
30 - 50 s
35 - 55 s
45 - 65 s
50 - 70 s
Activity
Inclination
0°
1°
2°
3°
4°
Table 6-3: Acquisition time (Continued)
Important
The calibration function is not able to verify the
correctness or precision of the supplied longitude. It is
therefore important to supply the correct longitude
including the first decimal.
SAILOR900Ka-IM-98-146706.book Page 8 Thursday, July 16, 2015 11:07 AM
