Reson SeaBat 7125 SV2, Руководство оператора

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SYSTEM PERFORMANCE AND DATA TYPES
SeaBat 7125 SV2 Operator‟s Manual
Page 121 July 25, 2011
Version 3
7.3 Best Coverage and Intermediate Modes
As the beam steering angle increases from nadir, the number of beams per degree of
swath stays constant for equiangular spacing (Minimum Beams mode) while it increases
for equidistant spacing (Best Coverage mode).
Figure 52 presents the number of beams
as a function of steering angle for a 1° nadir beam spacing.
Figure 52: Beam Density
Figure 53 shows that the horizontal spacing of the Intermediate mode increases with
beam angle, unlike Best Coverage mode (equidistant) where the spacing stays constant.
However, the Intermediate mode increases the spacing much slower than the Minimum
Beams mode (equiangular spacing) so the outer beam density is still quite good.
Figure 53: Beam Spacing vs. Beam Angle
Assuming a flat bottom and using the beam footprint generated by the nadir beam, it
may be seen that the center-to-center spacing for each beam successively reduces as
the departure from nadir increases until at ±65° the beam density is approximately 2.5
times greater than at nadir.