Satellite Searching - Nera Saturn BM Marine Operator's Manual

Satellite Searching

Introduction
The Saturn Bm may find a satellite and obtain synchronization in one
of several ways:
•
searching automatically when required.
•
the user starts a search from the keypad.
•
the user moves the antenna using the keypad.
Automatically Initiated Search
Two different "search types" are used:
Initial Search which starts automatically
•
at power on/restart, or
•
when changing Ocean Region
Auto Search which starts automatically
•
when losing synchronization for a preset time interval.
(For setting the time interval, see
chapter 3. Configuration.)
Search Patterns
The two search types above can be individually configured to perform
one of several search algorithms, called "search levels":
Search
level
0 NO_SEARCH
1 AZIMUTH_ONLY Search on the active NCSC frequency in the current
2 ACTIVE_FREQ
3 REGION_FREQS Search on all NCSCs in current Ocean Region. One or
4 ALL_REGIONS
5 FULL_SEARCH
6 DIRECT_SAT
7 DIRECT_BEST
(See chapter 2. Operation for a description of
5.10
Name
No search is performed.
Manually Initiated Search is still possible.
Ocean Region at last known elevation for the region.
One 360 degree search in azimuth.
Search on the active NCSC frequency in the current
Ocean Region.
One hemispheric search.
two hemispheric searches.
Search on active NCSC in all Ocean Regions.
One to max eight hemispheric searches
Search for all NCSCs in all Ocean Regions.
One to max thirty-two hemispheric searches.
Points the antenna directly at the satellite for the
current Ocean Region.
Finds the best Ocean Region by searching all satellites
above the horizon.
"Antenna Configuration" in
Description
hemispheric
Saturn Bm – Chapter 5. System
search).