Configuration and Operation
LD8 Operations Manual AB-V-MA-00635_RevA2 17
4.2 L-BAND CONFIGURATION
Tracking of a L-band beam is required to receive VERIPOS service correction data. This section will detail how
to establish and confirm successful L-band tracking in order to make use of VERIPOS services.
4.2.1 SELECTING AUTO BEAM
Auto Beam is the recommended way to manage L-band beam choices. When in this mode the LD8 will track
up to three beams simultaneously, with tracking determined based on available L-band satellites and
elevation. Data received from each of the L-band satellites will be utilised within the calculation, eliminating the
requirement to switch beam selection in the event of tracking loss.
Using Auto Beam can mitigate against the impact of a single beam failure or masking. Additionally, when using
Auto Beam and transiting across different geographic regions, the LD8 will automatically select available L-
band beams.
Whilst in this mode no manual beam selection is required. If a single beam is selected this will disable the Auto
Beam selection and the user will need to select a beam.
To enable the use of Auto Beam enter the following:
4.2.2 SELECTING A SINGLE BEAM
The receiver allows for selection of a single L-band beam. VERIPOS have six available beams as detailed
below and in most regions more than one beam should be available at all times. A global map with a beam
overlay can be found in the Appendix.
North America, Gulf of Mexico, South America
North America, Gulf of Mexico, South America, North Sea, West Africa
North Sea, Mediterranean Sea, Africa, Persian Gulf, Caspian Sea
Asia, Indian Ocean, East Africa, Persian Gulf, Caspian Sea, East Mediterranean
Asia, Australasia, Indian Ocean
East Asia, Australasia, Alaska
The VERIPOS software Verichart can be used to assess L-band availability, by creating coverage charts
specific to a work location.
Where possible different VERIPOS receiver units on the same vessel should be set to different beams to
maximise redundancy.
The format for assigning a specific L-band beam is as follows:
ASSIGNLBANDBEAM BEAM NAME
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