4-Axes Design
4-Axes Design = Reliable Satellite Communication
High elevation problems are experienced with traditional
3-axes systems and occurs in a wide belt around the equator when a
vessel rolls back and forth and the satellite is close to zenith.
The problem is provoking loss of signal, restarts and
downtime.
The 4-axes solution designed by C2SAT allowes the RF equipment to
move freely and to maintain an optimal position towards the
satellite without big and sudden movements even during harsh
conditions and heavy seas. The 4-axes system does not experience
dead angles and does therefore not experience any high-elevation
problems.
The high reability makes the C2SAT antennas suitable for use as the
main connection point as the system can carry large volumes of
information without interruption. C2SAT gradient track system
identifies and finds any selected satellite within 6-8
seconds.
3-Axis
4-Axis
Zenith pass problems can occur for
a The 4-Axis
system does not experi-
3-Axis system in a wide area around the ence dead
angles and does therefore
equator. This will lead to loss of signal
- not experience any
high-elevation
less availabílity. Motors
subjected to
problems.
stress & wear - more service required.
Better accuracy and Faster System
The system achieves superbly high tracking accuracy (only
a loss of +- 0,1 dB), comparable to a fixed antenna. C2SAT prefers
to use the value of tracking accuracy to measure performance
instead of pointing accuracy, because it includes both losses, due
to pointing and polarisation misalignments.
The high tracking accuracy is a result of the C2SAT gradient
tracking method, a predetermination tracking parameter and the
4-axes design, where the fourth axis refers to the cross-level
elevation. Higher accuracy results in: improved availability; more
efficient use of shared lines and network bandwidth; and wider
operational area in the satellite footprint.
The system is faster due to the gimbal design with AC servomotors
on each axis, and the C2SAT gradient satellite tracking method on
all axes. The system locks on the satellite within 6 seconds
acquisition time, starting from its parking position. This speeds
up the transition from one satellite to another and results in
extremely fast recovery from sync loss.
