Kongsberg 1007D - 7 Appendix - 1007 D Altimeter Altitude Detection Algorithm

974-72007001/1.0 1007D Altimeter Operators Manual
Page 38 1007D Altimeter Altitude Detection Algorithm
Kongsberg Mesotech Ltd.
Port Coquitlam, BC - Canada
7 APPENDIX - 1007D ALTIMETER ALTITUDE
DETECTION ALGORITHM
The 1007D is a digital altimeter used in several applications such as bottom profiling
and forward-looking obstacle avoidance deployments. This appendix describes the
methods used to determine the altitude/return values from the sampled sonar data.
The following figure shows a typical altimeter return signal:

Min. Width Setting
Min. Gap Setting
Min . Range
Setting
Min. Width Setting
Threshold
Setting
A
D
E F G H
M
N
A
m
p
l
i
t
u
d
e
Time
ALTIMETER RETUR
N
C
B