| Approach |
Stabilization algorithms scan the antenna in earth coordinates using
AZ and EL velocity and position servos that are adjusted for the pitch, roll and
heading (and rates of change) of the platform. |
| Built-in display |
Selectable earth or pedestal relative AZ/EL position and/or
velocity. |
| Motion reference |
Honeywell or Seatec INU with GPS update and serial output |
| Platform motion sensor input |
Pitch, roll heading and rates and absolute platform position and
velocity from inertial navigation system such as the Honeywell MAPS system on SDLC
serial line or Seatex, Inc. Seapath 200 system on RS232C serial line. GPS update and
at-sea alignment are highly recommended for any INU system. |
| Range of operation |
Typical 0 ... 65° elevation (earth relative) for up to 15° of
attitude change.  | Antenna pedestal
should be capable of ~ -20° of elevation. |
|
| Typical performance |
0.1° of accuracy for elevation angles in the range 0 to 65° for
inclinations, up 15° over 10-second periods. Exact performance depends on servo drive
performance. |
