October 2017 RiverPro and RioPro ADCP Guide
Page 96
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
EB – Heading Bias
Purpose Corrects for electrical/magnetic bias between the RiverPro/RioPro heading value and the
heading reference.
Format EB±nnnnn
Range ±nnnnn = -17999 to 18000 (-179.99 to 180.00 degrees)
Default EB00000
Recommended Setting. Set using the magnetic variation setting in WinRiver II.
Description EB is the heading angle that counteracts the electrical bias or magnetic declination be-
tween the RiverPro/RioPro and the heading source. Use the EA-command to correct for
physical heading misalignment between the RiverPro/RioPro and a vessel’s centerline.
Examples A RiverPro/RioPro is receiving heading from its internal compass. A navigation map for
the deployment area shows a declination of 10°10′W 1995 (9′E/year). This means the
magnetic offset in the year 2001 at this location is (- (10+10/60) + (9/60*6)) = -9.26666
degrees. Set the EB command value to EB-926.
EC – Speed of Sound
Purpose Sets the speed of sound value used for RiverPro/RioPro data processing.
Format ECnnnn
Range nnnn = 1400 to 1600 meters per second
Default EC 1485
Recommended Setting. The default setting for this command is recommended for most applications.
Description EC sets the sound speed value used by the RiverPro/RioPro to scale velocity data, depth
cell size, and range to the bottom. The RiverPro/RioPro assumes the speed of sound read-
ing is taken at the transducer head. See the primer for information on speed of sound cal-
culations.
If the EZ Speed of Sound field = 0, the RiverPro/RioPro overrides the manually-set EC value
and calculates speed of sound using the values determined by transducer depth (ED), salinity
(ES), and transducer temperature (ET). EZ also selects the source for ED, ES, and ET.
To Next Page
Loading...
