SeaSpace TeraScan 1.5M, Operation And Maintenance Manual

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198
SeaSpace Corporation
Notes on the Table 10-1:
c
Program Track: This setting is used in computing the program track for the antenna.
d
3-Axes Motion: This setting is used in computing the antenna tracking sequence with all three axes
(azimuth, elevation, and cross-level) used in the tracking solution.
e
Conscan Autotrack: This setting is used by Conscan autotracking .
cl.cs.start x degrees Conscan parameter: antenna
elevation where cross-level
corrections are used in place of
azimuth corrections.
constants x x x Individual values for different
types of antennas. See "Constants
Settings" below.
The next four settings control how the two-axis tracking sequence (azimuth, elevation) is converted into a three-
axis tracking sequence (azimuth, elevation, cross-level). There are three different methods available to adjust the
tracking on the maximum elevation of the pass and these three settings.
No cross-level motion during the pass. Cross-level beam remains fixed at 90
°
(horizontal). This method will be
used if the maximum pass elevation is less than cl.el.min .
The cross-level beam is moved during the pass. This method will be used if the maximum pass elevation is in
the range [
cl.el.min , cl.el.max }.
The cross-level beam is fixed at a non-horizontal position and the antenna elevation motion varies from 0
°
to
180
°
. This method will be used if the maximum pass elevation is greater than cl.el.max .
cl.el.min x degrees Minimum elevation that cross-
level motion is involved in the
tracking solution. Example value:
64. Use a value of 90 if cross-level
torque error occurs.
cl.el.max x degrees Maximum elevation during a
pass for which the cross-level
beam will be moved. For a 1.5m
antenna, this value is fixed at 90.
cl.el.start x fraction Cross-level beam moves when
antenna elevation >
cl.el.start *
maximum pass elevation.
Example value: 0.65
cl.mag x degrees Absolute value of the range of
motion of the cross-level beam.
Example value: 15
The cross-level beam will move in
the range (90 - 15)
°
to
(90 + 15)
°
.
T
ABLE
10-1:
Layout of antenna.calib File
.
Setting
Program
Track
c
3-Axis
Motion
d
Conscan
Autotrack
e
Units Description